{"api_version":"1","generated_at":"2026-11-10T15:38:51+00:00","cve":"CVE-2022-50008","urls":{"html":"https://cve.report/CVE-2022-50008","api":"https://cve.report/api/cve/CVE-2022-50008.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2022-50008","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2022-50008"},"summary":{"title":"kprobes: don't call disarm_kprobe() for disabled kprobes","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nkprobes: don't call disarm_kprobe() for disabled kprobes\n\nThe assumption in __disable_kprobe() is wrong, and it could try to disarm\nan already disarmed kprobe and fire the WARN_ONCE() below. [0]  We can\neasily reproduce this issue.\n\n1. Write 0 to /sys/kernel/debug/kprobes/enabled.\n\n  # echo 0 > /sys/kernel/debug/kprobes/enabled\n\n2. Run execsnoop.  At this time, one kprobe is disabled.\n\n  # /usr/share/bcc/tools/execsnoop &\n  [1] 2460\n  PCOMM            PID    PPID   RET ARGS\n\n  # cat /sys/kernel/debug/kprobes/list\n  ffffffff91345650  r  __x64_sys_execve+0x0    [FTRACE]\n  ffffffff91345650  k  __x64_sys_execve+0x0    [DISABLED][FTRACE]\n\n3. Write 1 to /sys/kernel/debug/kprobes/enabled, which changes\n   kprobes_all_disarmed to false but does not arm the disabled kprobe.\n\n  # echo 1 > /sys/kernel/debug/kprobes/enabled\n\n  # cat /sys/kernel/debug/kprobes/list\n  ffffffff91345650  r  __x64_sys_execve+0x0    [FTRACE]\n  ffffffff91345650  k  __x64_sys_execve+0x0    [DISABLED][FTRACE]\n\n4. Kill execsnoop, when __disable_kprobe() calls disarm_kprobe() for the\n   disabled kprobe and hits the WARN_ONCE() in __disarm_kprobe_ftrace().\n\n  # fg\n  /usr/share/bcc/tools/execsnoop\n  ^C\n\nActually, WARN_ONCE() is fired twice, and __unregister_kprobe_top() misses\nsome cleanups and leaves the aggregated kprobe in the hash table.  Then,\n__unregister_trace_kprobe() initialises tk->rp.kp.list and creates an\ninfinite loop like this.\n\n  aggregated kprobe.list -> kprobe.list -.\n                                     ^    |\n                                     '.__.'\n\nIn this situation, these commands fall into the infinite loop and result\nin RCU stall or soft lockup.\n\n  cat /sys/kernel/debug/kprobes/list : show_kprobe_addr() enters into the\n                                       infinite loop with RCU.\n\n  /usr/share/bcc/tools/execsnoop : warn_kprobe_rereg() holds kprobe_mutex,\n                                   and __get_valid_kprobe() is stuck in\n\t\t\t\t   the loop.\n\nTo avoid the issue, make sure we don't call disarm_kprobe() for disabled\nkprobes.\n\n[0]\nFailed to disarm kprobe-ftrace at __x64_sys_execve+0x0/0x40 (error -2)\nWARNING: CPU: 6 PID: 2460 at kernel/kprobes.c:1130 __disarm_kprobe_ftrace.isra.19 (kernel/kprobes.c:1129)\nModules linked in: ena\nCPU: 6 PID: 2460 Comm: execsnoop Not tainted 5.19.0+ #28\nHardware name: Amazon EC2 c5.2xlarge/, BIOS 1.0 10/16/2017\nRIP: 0010:__disarm_kprobe_ftrace.isra.19 (kernel/kprobes.c:1129)\nCode: 24 8b 02 eb c1 80 3d c4 83 f2 01 00 75 d4 48 8b 75 00 89 c2 48 c7 c7 90 fa 0f 92 89 04 24 c6 05 ab 83 01 e8 e4 94 f0 ff <0f> 0b 8b 04 24 eb b1 89 c6 48 c7 c7 60 fa 0f 92 89 04 24 e8 cc 94\nRSP: 0018:ffff9e6ec154bd98 EFLAGS: 00010282\nRAX: 0000000000000000 RBX: ffffffff930f7b00 RCX: 0000000000000001\nRDX: 0000000080000001 RSI: ffffffff921461c5 RDI: 00000000ffffffff\nRBP: ffff89c504286da8 R08: 0000000000000000 R09: c0000000fffeffff\nR10: 0000000000000000 R11: ffff9e6ec154bc28 R12: ffff89c502394e40\nR13: ffff89c502394c00 R14: ffff9e6ec154bc00 R15: 0000000000000000\nFS:  00007fe800398740(0000) GS:ffff89c812d80000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000c00057f010 CR3: 0000000103b54006 CR4: 00000000007706e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n<TASK>\n __disable_kprobe (kernel/kprobes.c:1716)\n disable_kprobe (kernel/kprobes.c:2392)\n __disable_trace_kprobe (kernel/trace/trace_kprobe.c:340)\n disable_trace_kprobe (kernel/trace/trace_kprobe.c:429)\n perf_trace_event_unreg.isra.2 (./include/linux/tracepoint.h:93 kernel/trace/trace_event_perf.c:168)\n perf_kprobe_destroy (kernel/trace/trace_event_perf.c:295)\n _free_event (kernel/events/core.c:4971)\n perf_event_release_kernel (kernel/events/core.c:5176)\n perf_release (kernel/events/core.c:5186)\n __fput (fs/file_table.c:321)\n task_work_run (./include/linux/\n---truncated---","state":"PUBLISHED","assigner":"Linux","published_at":"2025-06-18 11:15:28","updated_at":"2026-11-05 20:17:20"},"problem_types":["CWE-835"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"5.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"references":[{"url":"https://git.kernel.org/stable/c/55c7a91527343d2e0b5647cc308c6e04ddd2aa52","name":"https://git.kernel.org/stable/c/55c7a91527343d2e0b5647cc308c6e04ddd2aa52","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/19cd630712e7c13a3dedfc6986a9b983fed6fd98","name":"https://git.kernel.org/stable/c/19cd630712e7c13a3dedfc6986a9b983fed6fd98","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/744b0d3080709a172f0408aedabd1cedd24c2ee6","name":"https://git.kernel.org/stable/c/744b0d3080709a172f0408aedabd1cedd24c2ee6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9c80e79906b4ca440d09e7f116609262bb747909","name":"https://git.kernel.org/stable/c/9c80e79906b4ca440d09e7f116609262bb747909","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fc91d2db55acdaf0c0075b624e572d3520ca3bc3","name":"https://git.kernel.org/stable/c/fc91d2db55acdaf0c0075b624e572d3520ca3bc3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6f3c1bc22fc2165461883f506b4d2c3594bd7137","name":"https://git.kernel.org/stable/c/6f3c1bc22fc2165461883f506b4d2c3594bd7137","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b474ff1b20951f1eac75d100a93861e6da2b522b","name":"https://git.kernel.org/stable/c/b474ff1b20951f1eac75d100a93861e6da2b522b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bc3188d8a3b8c08c306a4c851ddb2c92ba4599ca","name":"https://git.kernel.org/stable/c/bc3188d8a3b8c08c306a4c851ddb2c92ba4599ca","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2022-50008","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50008","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 69d54b916d83872a0a327778a01af2a096923f59 19cd630712e7c13a3dedfc6986a9b983fed6fd98 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 69d54b916d83872a0a327778a01af2a096923f59 6f3c1bc22fc2165461883f506b4d2c3594bd7137 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 69d54b916d83872a0a327778a01af2a096923f59 fc91d2db55acdaf0c0075b624e572d3520ca3bc3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 69d54b916d83872a0a327778a01af2a096923f59 b474ff1b20951f1eac75d100a93861e6da2b522b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 69d54b916d83872a0a327778a01af2a096923f59 744b0d3080709a172f0408aedabd1cedd24c2ee6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 69d54b916d83872a0a327778a01af2a096923f59 55c7a91527343d2e0b5647cc308c6e04ddd2aa52 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 69d54b916d83872a0a327778a01af2a096923f59 bc3188d8a3b8c08c306a4c851ddb2c92ba4599ca git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 69d54b916d83872a0a327778a01af2a096923f59 9c80e79906b4ca440d09e7f116609262bb747909 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.0 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.9.327 4.9.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.14.292 4.14.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.19.257 4.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.4.212 5.4.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.141 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.65 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.19.6 5.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2022","cve_id":"50008","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2022-50008","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-11-05T19:52:55.378052Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-11-05T20:00:13.618Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/kprobes.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"19cd630712e7c13a3dedfc6986a9b983fed6fd98","status":"affected","version":"69d54b916d83872a0a327778a01af2a096923f59","versionType":"git"},{"lessThan":"6f3c1bc22fc2165461883f506b4d2c3594bd7137","status":"affected","version":"69d54b916d83872a0a327778a01af2a096923f59","versionType":"git"},{"lessThan":"fc91d2db55acdaf0c0075b624e572d3520ca3bc3","status":"affected","version":"69d54b916d83872a0a327778a01af2a096923f59","versionType":"git"},{"lessThan":"b474ff1b20951f1eac75d100a93861e6da2b522b","status":"affected","version":"69d54b916d83872a0a327778a01af2a096923f59","versionType":"git"},{"lessThan":"744b0d3080709a172f0408aedabd1cedd24c2ee6","status":"affected","version":"69d54b916d83872a0a327778a01af2a096923f59","versionType":"git"},{"lessThan":"55c7a91527343d2e0b5647cc308c6e04ddd2aa52","status":"affected","version":"69d54b916d83872a0a327778a01af2a096923f59","versionType":"git"},{"lessThan":"bc3188d8a3b8c08c306a4c851ddb2c92ba4599ca","status":"affected","version":"69d54b916d83872a0a327778a01af2a096923f59","versionType":"git"},{"lessThan":"9c80e79906b4ca440d09e7f116609262bb747909","status":"affected","version":"69d54b916d83872a0a327778a01af2a096923f59","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/kprobes.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.0"},{"lessThan":"4.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"4.9.*","status":"unaffected","version":"4.9.327","versionType":"semver"},{"lessThanOrEqual":"4.14.*","status":"unaffected","version":"4.14.292","versionType":"semver"},{"lessThanOrEqual":"4.19.*","status":"unaffected","version":"4.19.257","versionType":"semver"},{"lessThanOrEqual":"5.4.*","status":"unaffected","version":"5.4.212","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.141","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.65","versionType":"semver"},{"lessThanOrEqual":"5.19.*","status":"unaffected","version":"5.19.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"4.9.327","versionStartIncluding":"4.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"4.14.292","versionStartIncluding":"4.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"4.19.257","versionStartIncluding":"4.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.4.212","versionStartIncluding":"4.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.141","versionStartIncluding":"4.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.65","versionStartIncluding":"4.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.19.6","versionStartIncluding":"4.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.0","versionStartIncluding":"4.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nkprobes: don't call disarm_kprobe() for disabled kprobes\n\nThe assumption in __disable_kprobe() is wrong, and it could try to disarm\nan already disarmed kprobe and fire the WARN_ONCE() below. [0]  We can\neasily reproduce this issue.\n\n1. Write 0 to /sys/kernel/debug/kprobes/enabled.\n\n  # echo 0 > /sys/kernel/debug/kprobes/enabled\n\n2. Run execsnoop.  At this time, one kprobe is disabled.\n\n  # /usr/share/bcc/tools/execsnoop &\n  [1] 2460\n  PCOMM            PID    PPID   RET ARGS\n\n  # cat /sys/kernel/debug/kprobes/list\n  ffffffff91345650  r  __x64_sys_execve+0x0    [FTRACE]\n  ffffffff91345650  k  __x64_sys_execve+0x0    [DISABLED][FTRACE]\n\n3. Write 1 to /sys/kernel/debug/kprobes/enabled, which changes\n   kprobes_all_disarmed to false but does not arm the disabled kprobe.\n\n  # echo 1 > /sys/kernel/debug/kprobes/enabled\n\n  # cat /sys/kernel/debug/kprobes/list\n  ffffffff91345650  r  __x64_sys_execve+0x0    [FTRACE]\n  ffffffff91345650  k  __x64_sys_execve+0x0    [DISABLED][FTRACE]\n\n4. Kill execsnoop, when __disable_kprobe() calls disarm_kprobe() for the\n   disabled kprobe and hits the WARN_ONCE() in __disarm_kprobe_ftrace().\n\n  # fg\n  /usr/share/bcc/tools/execsnoop\n  ^C\n\nActually, WARN_ONCE() is fired twice, and __unregister_kprobe_top() misses\nsome cleanups and leaves the aggregated kprobe in the hash table.  Then,\n__unregister_trace_kprobe() initialises tk->rp.kp.list and creates an\ninfinite loop like this.\n\n  aggregated kprobe.list -> kprobe.list -.\n                                     ^    |\n                                     '.__.'\n\nIn this situation, these commands fall into the infinite loop and result\nin RCU stall or soft lockup.\n\n  cat /sys/kernel/debug/kprobes/list : show_kprobe_addr() enters into the\n                                       infinite loop with RCU.\n\n  /usr/share/bcc/tools/execsnoop : warn_kprobe_rereg() holds kprobe_mutex,\n                                   and __get_valid_kprobe() is stuck in\n\t\t\t\t   the loop.\n\nTo avoid the issue, make sure we don't call disarm_kprobe() for disabled\nkprobes.\n\n[0]\nFailed to disarm kprobe-ftrace at __x64_sys_execve+0x0/0x40 (error -2)\nWARNING: CPU: 6 PID: 2460 at kernel/kprobes.c:1130 __disarm_kprobe_ftrace.isra.19 (kernel/kprobes.c:1129)\nModules linked in: ena\nCPU: 6 PID: 2460 Comm: execsnoop Not tainted 5.19.0+ #28\nHardware name: Amazon EC2 c5.2xlarge/, BIOS 1.0 10/16/2017\nRIP: 0010:__disarm_kprobe_ftrace.isra.19 (kernel/kprobes.c:1129)\nCode: 24 8b 02 eb c1 80 3d c4 83 f2 01 00 75 d4 48 8b 75 00 89 c2 48 c7 c7 90 fa 0f 92 89 04 24 c6 05 ab 83 01 e8 e4 94 f0 ff <0f> 0b 8b 04 24 eb b1 89 c6 48 c7 c7 60 fa 0f 92 89 04 24 e8 cc 94\nRSP: 0018:ffff9e6ec154bd98 EFLAGS: 00010282\nRAX: 0000000000000000 RBX: ffffffff930f7b00 RCX: 0000000000000001\nRDX: 0000000080000001 RSI: ffffffff921461c5 RDI: 00000000ffffffff\nRBP: ffff89c504286da8 R08: 0000000000000000 R09: c0000000fffeffff\nR10: 0000000000000000 R11: ffff9e6ec154bc28 R12: ffff89c502394e40\nR13: ffff89c502394c00 R14: ffff9e6ec154bc00 R15: 0000000000000000\nFS:  00007fe800398740(0000) GS:ffff89c812d80000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000c00057f010 CR3: 0000000103b54006 CR4: 00000000007706e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n<TASK>\n __disable_kprobe (kernel/kprobes.c:1716)\n disable_kprobe (kernel/kprobes.c:2392)\n __disable_trace_kprobe (kernel/trace/trace_kprobe.c:340)\n disable_trace_kprobe (kernel/trace/trace_kprobe.c:429)\n perf_trace_event_unreg.isra.2 (./include/linux/tracepoint.h:93 kernel/trace/trace_event_perf.c:168)\n perf_kprobe_destroy (kernel/trace/trace_event_perf.c:295)\n _free_event (kernel/events/core.c:4971)\n perf_event_release_kernel (kernel/events/core.c:5176)\n perf_release (kernel/events/core.c:5186)\n __fput (fs/file_table.c:321)\n task_work_run (./include/linux/\n---truncated---"}],"providerMetadata":{"dateUpdated":"2026-05-11T19:10:56.412Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/19cd630712e7c13a3dedfc6986a9b983fed6fd98"},{"url":"https://git.kernel.org/stable/c/6f3c1bc22fc2165461883f506b4d2c3594bd7137"},{"url":"https://git.kernel.org/stable/c/fc91d2db55acdaf0c0075b624e572d3520ca3bc3"},{"url":"https://git.kernel.org/stable/c/b474ff1b20951f1eac75d100a93861e6da2b522b"},{"url":"https://git.kernel.org/stable/c/744b0d3080709a172f0408aedabd1cedd24c2ee6"},{"url":"https://git.kernel.org/stable/c/55c7a91527343d2e0b5647cc308c6e04ddd2aa52"},{"url":"https://git.kernel.org/stable/c/bc3188d8a3b8c08c306a4c851ddb2c92ba4599ca"},{"url":"https://git.kernel.org/stable/c/9c80e79906b4ca440d09e7f116609262bb747909"}],"title":"kprobes: don't call disarm_kprobe() for disabled kprobes","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2022-50008","datePublished":"2025-06-18T11:01:13.331Z","dateReserved":"2025-06-18T10:57:27.388Z","dateUpdated":"2026-11-05T20:00:13.618Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-06-18 11:15:28","lastModifiedDate":"2026-11-05 20:17:20","problem_types":["CWE-835"],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-11-05T19:52:55.378052Z","id":"CVE-2022-50008","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"4.9.327","matchCriteriaId":"203966D0-A354-4EC4-91F9-E064E3CF8F8D"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"4.14.292","matchCriteriaId":"42DF7D19-F259-47AF-8715-288480443B27"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"4.19.257","matchCriteriaId":"379F570B-8101-4252-AE1C-B802D441D9B4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.4.212","matchCriteriaId":"BEFFBCD7-9B53-46AB-B3FD-53EAD80FD3E1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.141","matchCriteriaId":"6872143E-BF6D-4DB5-8454-D843F608AB3B"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.65","matchCriteriaId":"81162A58-341F-455C-96D5-6DF30A0F9295"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"5.19.6","matchCriteriaId":"89E99903-E16D-475D-954B-2BAC46C98262"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*","matchCriteriaId":"E8BD11A3-8643-49B6-BADE-5029A0117325"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*","matchCriteriaId":"5F0AD220-F6A9-4012-8636-155F1B841FAD"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2022","CveId":"50008","Ordinal":"1","Title":"kprobes: don't call disarm_kprobe() for disabled kprobes","CVE":"CVE-2022-50008","Year":"2022"},"notes":[{"CveYear":"2022","CveId":"50008","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nkprobes: don't call disarm_kprobe() for disabled kprobes\n\nThe assumption in __disable_kprobe() is wrong, and it could try to disarm\nan already disarmed kprobe and fire the WARN_ONCE() below. [0]  We can\neasily reproduce this issue.\n\n1. Write 0 to /sys/kernel/debug/kprobes/enabled.\n\n  # echo 0 > /sys/kernel/debug/kprobes/enabled\n\n2. Run execsnoop.  At this time, one kprobe is disabled.\n\n  # /usr/share/bcc/tools/execsnoop &\n  [1] 2460\n  PCOMM            PID    PPID   RET ARGS\n\n  # cat /sys/kernel/debug/kprobes/list\n  ffffffff91345650  r  __x64_sys_execve+0x0    [FTRACE]\n  ffffffff91345650  k  __x64_sys_execve+0x0    [DISABLED][FTRACE]\n\n3. Write 1 to /sys/kernel/debug/kprobes/enabled, which changes\n   kprobes_all_disarmed to false but does not arm the disabled kprobe.\n\n  # echo 1 > /sys/kernel/debug/kprobes/enabled\n\n  # cat /sys/kernel/debug/kprobes/list\n  ffffffff91345650  r  __x64_sys_execve+0x0    [FTRACE]\n  ffffffff91345650  k  __x64_sys_execve+0x0    [DISABLED][FTRACE]\n\n4. Kill execsnoop, when __disable_kprobe() calls disarm_kprobe() for the\n   disabled kprobe and hits the WARN_ONCE() in __disarm_kprobe_ftrace().\n\n  # fg\n  /usr/share/bcc/tools/execsnoop\n  ^C\n\nActually, WARN_ONCE() is fired twice, and __unregister_kprobe_top() misses\nsome cleanups and leaves the aggregated kprobe in the hash table.  Then,\n__unregister_trace_kprobe() initialises tk->rp.kp.list and creates an\ninfinite loop like this.\n\n  aggregated kprobe.list -> kprobe.list -.\n                                     ^    |\n                                     '.__.'\n\nIn this situation, these commands fall into the infinite loop and result\nin RCU stall or soft lockup.\n\n  cat /sys/kernel/debug/kprobes/list : show_kprobe_addr() enters into the\n                                       infinite loop with RCU.\n\n  /usr/share/bcc/tools/execsnoop : warn_kprobe_rereg() holds kprobe_mutex,\n                                   and __get_valid_kprobe() is stuck in\n\t\t\t\t   the loop.\n\nTo avoid the issue, make sure we don't call disarm_kprobe() for disabled\nkprobes.\n\n[0]\nFailed to disarm kprobe-ftrace at __x64_sys_execve+0x0/0x40 (error -2)\nWARNING: CPU: 6 PID: 2460 at kernel/kprobes.c:1130 __disarm_kprobe_ftrace.isra.19 (kernel/kprobes.c:1129)\nModules linked in: ena\nCPU: 6 PID: 2460 Comm: execsnoop Not tainted 5.19.0+ #28\nHardware name: Amazon EC2 c5.2xlarge/, BIOS 1.0 10/16/2017\nRIP: 0010:__disarm_kprobe_ftrace.isra.19 (kernel/kprobes.c:1129)\nCode: 24 8b 02 eb c1 80 3d c4 83 f2 01 00 75 d4 48 8b 75 00 89 c2 48 c7 c7 90 fa 0f 92 89 04 24 c6 05 ab 83 01 e8 e4 94 f0 ff <0f> 0b 8b 04 24 eb b1 89 c6 48 c7 c7 60 fa 0f 92 89 04 24 e8 cc 94\nRSP: 0018:ffff9e6ec154bd98 EFLAGS: 00010282\nRAX: 0000000000000000 RBX: ffffffff930f7b00 RCX: 0000000000000001\nRDX: 0000000080000001 RSI: ffffffff921461c5 RDI: 00000000ffffffff\nRBP: ffff89c504286da8 R08: 0000000000000000 R09: c0000000fffeffff\nR10: 0000000000000000 R11: ffff9e6ec154bc28 R12: ffff89c502394e40\nR13: ffff89c502394c00 R14: ffff9e6ec154bc00 R15: 0000000000000000\nFS:  00007fe800398740(0000) GS:ffff89c812d80000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000c00057f010 CR3: 0000000103b54006 CR4: 00000000007706e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n<TASK>\n __disable_kprobe (kernel/kprobes.c:1716)\n disable_kprobe (kernel/kprobes.c:2392)\n __disable_trace_kprobe (kernel/trace/trace_kprobe.c:340)\n disable_trace_kprobe (kernel/trace/trace_kprobe.c:429)\n perf_trace_event_unreg.isra.2 (./include/linux/tracepoint.h:93 kernel/trace/trace_event_perf.c:168)\n perf_kprobe_destroy (kernel/trace/trace_event_perf.c:295)\n _free_event (kernel/events/core.c:4971)\n perf_event_release_kernel (kernel/events/core.c:5176)\n perf_release (kernel/events/core.c:5186)\n __fput (fs/file_table.c:321)\n task_work_run (./include/linux/\n---truncated---","Type":"Description","Title":"kprobes: don't call disarm_kprobe() for disabled kprobes"}]}}}