{"api_version":"1","generated_at":"2026-07-23T14:54:35+00:00","cve":"CVE-2023-53133","urls":{"html":"https://cve.report/CVE-2023-53133","api":"https://cve.report/api/cve/CVE-2023-53133.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-53133","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-53133"},"summary":{"title":"bpf, sockmap: Fix an infinite loop error when len is 0 in tcp_bpf_recvmsg_parser()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: Fix an infinite loop error when len is 0 in tcp_bpf_recvmsg_parser()\n\nWhen the buffer length of the recvmsg system call is 0, we got the\nflollowing soft lockup problem:\n\nwatchdog: BUG: soft lockup - CPU#3 stuck for 27s! [a.out:6149]\nCPU: 3 PID: 6149 Comm: a.out Kdump: loaded Not tainted 6.2.0+ #30\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014\nRIP: 0010:remove_wait_queue+0xb/0xc0\nCode: 5e 41 5f c3 cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 41 57 <41> 56 41 55 41 54 55 48 89 fd 53 48 89 f3 4c 8d 6b 18 4c 8d 73 20\nRSP: 0018:ffff88811b5978b8 EFLAGS: 00000246\nRAX: 0000000000000000 RBX: ffff88811a7d3780 RCX: ffffffffb7a4d768\nRDX: dffffc0000000000 RSI: ffff88811b597908 RDI: ffff888115408040\nRBP: 1ffff110236b2f1b R08: 0000000000000000 R09: ffff88811a7d37e7\nR10: ffffed10234fa6fc R11: 0000000000000001 R12: ffff88811179b800\nR13: 0000000000000001 R14: ffff88811a7d38a8 R15: ffff88811a7d37e0\nFS:  00007f6fb5398740(0000) GS:ffff888237180000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000020000000 CR3: 000000010b6ba002 CR4: 0000000000370ee0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n tcp_msg_wait_data+0x279/0x2f0\n tcp_bpf_recvmsg_parser+0x3c6/0x490\n inet_recvmsg+0x280/0x290\n sock_recvmsg+0xfc/0x120\n ____sys_recvmsg+0x160/0x3d0\n ___sys_recvmsg+0xf0/0x180\n __sys_recvmsg+0xea/0x1a0\n do_syscall_64+0x3f/0x90\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\nThe logic in tcp_bpf_recvmsg_parser is as follows:\n\nmsg_bytes_ready:\n\tcopied = sk_msg_recvmsg(sk, psock, msg, len, flags);\n\tif (!copied) {\n\t\twait data;\n\t\tgoto msg_bytes_ready;\n\t}\n\nIn this case, \"copied\" always is 0, the infinite loop occurs.\n\nAccording to the Linux system call man page, 0 should be returned in this\ncase. Therefore, in tcp_bpf_recvmsg_parser(), if the length is 0, directly\nreturn. Also modify several other functions with the same problem.","state":"PUBLISHED","assigner":"Linux","published_at":"2025-05-02 16:15:32","updated_at":"2026-06-01 17:16:24"},"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/bf0579989de64d36e177c0611c685dc4a91457a7","name":"https://git.kernel.org/stable/c/bf0579989de64d36e177c0611c685dc4a91457a7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f45cf3ae3068e70e2c7f3e24a7f8e8aa99511f03","name":"https://git.kernel.org/stable/c/f45cf3ae3068e70e2c7f3e24a7f8e8aa99511f03","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d900f3d20cc3169ce42ec72acc850e662a4d4db2","name":"https://git.kernel.org/stable/c/d900f3d20cc3169ce42ec72acc850e662a4d4db2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4a476285f6d2921c3c9faa494eab83b78f78fc55","name":"https://git.kernel.org/stable/c/4a476285f6d2921c3c9faa494eab83b78f78fc55","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f0d52cc242f279c422b487dcaaccd98b99672fd0","name":"https://git.kernel.org/stable/c/f0d52cc242f279c422b487dcaaccd98b99672fd0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-53133","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53133","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 604326b41a6fb9b4a78b6179335decee0365cd8c f0d52cc242f279c422b487dcaaccd98b99672fd0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 604326b41a6fb9b4a78b6179335decee0365cd8c 4a476285f6d2921c3c9faa494eab83b78f78fc55 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 604326b41a6fb9b4a78b6179335decee0365cd8c f45cf3ae3068e70e2c7f3e24a7f8e8aa99511f03 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 604326b41a6fb9b4a78b6179335decee0365cd8c bf0579989de64d36e177c0611c685dc4a91457a7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 604326b41a6fb9b4a78b6179335decee0365cd8c d900f3d20cc3169ce42ec72acc850e662a4d4db2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.20","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.20 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.258 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.103 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.20 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.2.7 6.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"53133","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":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv4/tcp_bpf.c","net/ipv4/udp_bpf.c","net/unix/unix_bpf.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f0d52cc242f279c422b487dcaaccd98b99672fd0","status":"affected","version":"604326b41a6fb9b4a78b6179335decee0365cd8c","versionType":"git"},{"lessThan":"4a476285f6d2921c3c9faa494eab83b78f78fc55","status":"affected","version":"604326b41a6fb9b4a78b6179335decee0365cd8c","versionType":"git"},{"lessThan":"f45cf3ae3068e70e2c7f3e24a7f8e8aa99511f03","status":"affected","version":"604326b41a6fb9b4a78b6179335decee0365cd8c","versionType":"git"},{"lessThan":"bf0579989de64d36e177c0611c685dc4a91457a7","status":"affected","version":"604326b41a6fb9b4a78b6179335decee0365cd8c","versionType":"git"},{"lessThan":"d900f3d20cc3169ce42ec72acc850e662a4d4db2","status":"affected","version":"604326b41a6fb9b4a78b6179335decee0365cd8c","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv4/tcp_bpf.c","net/ipv4/udp_bpf.c","net/unix/unix_bpf.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.20"},{"lessThan":"4.20","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.103","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.20","versionType":"semver"},{"lessThanOrEqual":"6.2.*","status":"unaffected","version":"6.2.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.258","versionStartIncluding":"4.20","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.103","versionStartIncluding":"4.20","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.20","versionStartIncluding":"4.20","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.2.7","versionStartIncluding":"4.20","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.3","versionStartIncluding":"4.20","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: Fix an infinite loop error when len is 0 in tcp_bpf_recvmsg_parser()\n\nWhen the buffer length of the recvmsg system call is 0, we got the\nflollowing soft lockup problem:\n\nwatchdog: BUG: soft lockup - CPU#3 stuck for 27s! [a.out:6149]\nCPU: 3 PID: 6149 Comm: a.out Kdump: loaded Not tainted 6.2.0+ #30\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014\nRIP: 0010:remove_wait_queue+0xb/0xc0\nCode: 5e 41 5f c3 cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 41 57 <41> 56 41 55 41 54 55 48 89 fd 53 48 89 f3 4c 8d 6b 18 4c 8d 73 20\nRSP: 0018:ffff88811b5978b8 EFLAGS: 00000246\nRAX: 0000000000000000 RBX: ffff88811a7d3780 RCX: ffffffffb7a4d768\nRDX: dffffc0000000000 RSI: ffff88811b597908 RDI: ffff888115408040\nRBP: 1ffff110236b2f1b R08: 0000000000000000 R09: ffff88811a7d37e7\nR10: ffffed10234fa6fc R11: 0000000000000001 R12: ffff88811179b800\nR13: 0000000000000001 R14: ffff88811a7d38a8 R15: ffff88811a7d37e0\nFS:  00007f6fb5398740(0000) GS:ffff888237180000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000020000000 CR3: 000000010b6ba002 CR4: 0000000000370ee0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n tcp_msg_wait_data+0x279/0x2f0\n tcp_bpf_recvmsg_parser+0x3c6/0x490\n inet_recvmsg+0x280/0x290\n sock_recvmsg+0xfc/0x120\n ____sys_recvmsg+0x160/0x3d0\n ___sys_recvmsg+0xf0/0x180\n __sys_recvmsg+0xea/0x1a0\n do_syscall_64+0x3f/0x90\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\nThe logic in tcp_bpf_recvmsg_parser is as follows:\n\nmsg_bytes_ready:\n\tcopied = sk_msg_recvmsg(sk, psock, msg, len, flags);\n\tif (!copied) {\n\t\twait data;\n\t\tgoto msg_bytes_ready;\n\t}\n\nIn this case, \"copied\" always is 0, the infinite loop occurs.\n\nAccording to the Linux system call man page, 0 should be returned in this\ncase. Therefore, in tcp_bpf_recvmsg_parser(), if the length is 0, directly\nreturn. Also modify several other functions with the same problem."}],"providerMetadata":{"dateUpdated":"2026-06-01T16:04:07.921Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/f0d52cc242f279c422b487dcaaccd98b99672fd0"},{"url":"https://git.kernel.org/stable/c/4a476285f6d2921c3c9faa494eab83b78f78fc55"},{"url":"https://git.kernel.org/stable/c/f45cf3ae3068e70e2c7f3e24a7f8e8aa99511f03"},{"url":"https://git.kernel.org/stable/c/bf0579989de64d36e177c0611c685dc4a91457a7"},{"url":"https://git.kernel.org/stable/c/d900f3d20cc3169ce42ec72acc850e662a4d4db2"}],"title":"bpf, sockmap: Fix an infinite loop error when len is 0 in tcp_bpf_recvmsg_parser()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2023-53133","datePublished":"2025-05-02T15:56:06.981Z","dateReserved":"2025-05-02T15:51:43.561Z","dateUpdated":"2026-06-01T16:04:07.921Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-05-02 16:15:32","lastModifiedDate":"2026-06-01 17:16:24","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}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.15.103","matchCriteriaId":"9A448EF3-BCC2-4540-98BC-8158B650FDB6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.1.20","matchCriteriaId":"B22D8949-72A1-4CED-8318-A040635DEEBE"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.2.7","matchCriteriaId":"EFEDDF17-189C-4901-BD6B-41752E80AAA4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*","matchCriteriaId":"B8E3B0E8-FA27-4305-87BB-AF6C25B160CB"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2023","CveId":"53133","Ordinal":"1","Title":"bpf, sockmap: Fix an infinite loop error when len is 0 in tcp_bp","CVE":"CVE-2023-53133","Year":"2023"},"notes":[{"CveYear":"2023","CveId":"53133","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: Fix an infinite loop error when len is 0 in tcp_bpf_recvmsg_parser()\n\nWhen the buffer length of the recvmsg system call is 0, we got the\nflollowing soft lockup problem:\n\nwatchdog: BUG: soft lockup - CPU#3 stuck for 27s! [a.out:6149]\nCPU: 3 PID: 6149 Comm: a.out Kdump: loaded Not tainted 6.2.0+ #30\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014\nRIP: 0010:remove_wait_queue+0xb/0xc0\nCode: 5e 41 5f c3 cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 41 57 <41> 56 41 55 41 54 55 48 89 fd 53 48 89 f3 4c 8d 6b 18 4c 8d 73 20\nRSP: 0018:ffff88811b5978b8 EFLAGS: 00000246\nRAX: 0000000000000000 RBX: ffff88811a7d3780 RCX: ffffffffb7a4d768\nRDX: dffffc0000000000 RSI: ffff88811b597908 RDI: ffff888115408040\nRBP: 1ffff110236b2f1b R08: 0000000000000000 R09: ffff88811a7d37e7\nR10: ffffed10234fa6fc R11: 0000000000000001 R12: ffff88811179b800\nR13: 0000000000000001 R14: ffff88811a7d38a8 R15: ffff88811a7d37e0\nFS:  00007f6fb5398740(0000) GS:ffff888237180000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000020000000 CR3: 000000010b6ba002 CR4: 0000000000370ee0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n tcp_msg_wait_data+0x279/0x2f0\n tcp_bpf_recvmsg_parser+0x3c6/0x490\n inet_recvmsg+0x280/0x290\n sock_recvmsg+0xfc/0x120\n ____sys_recvmsg+0x160/0x3d0\n ___sys_recvmsg+0xf0/0x180\n __sys_recvmsg+0xea/0x1a0\n do_syscall_64+0x3f/0x90\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\nThe logic in tcp_bpf_recvmsg_parser is as follows:\n\nmsg_bytes_ready:\n\tcopied = sk_msg_recvmsg(sk, psock, msg, len, flags);\n\tif (!copied) {\n\t\twait data;\n\t\tgoto msg_bytes_ready;\n\t}\n\nIn this case, \"copied\" always is 0, the infinite loop occurs.\n\nAccording to the Linux system call man page, 0 should be returned in this\ncase. Therefore, in tcp_bpf_recvmsg_parser(), if the length is 0, directly\nreturn. Also modify several other functions with the same problem.","Type":"Description","Title":"bpf, sockmap: Fix an infinite loop error when len is 0 in tcp_bp"}]}}}