{"api_version":"1","generated_at":"2026-10-21T10:16:50+00:00","cve":"CVE-2026-98646","urls":{"html":"https://cve.report/CVE-2026-98646","api":"https://cve.report/api/cve/CVE-2026-98646.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98646","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98646"},"summary":{"title":"tcp: Skip cond_resched() in inet_csk_listen_stop() under BPF context","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: Skip cond_resched() in inet_csk_listen_stop() under BPF context\n\nbpf_sock_destroy() runs from the tcp iterator, under rcu_read_lock(). If\nthe sock is a listener that still has children in its accept queue,\ntcp_abort() ends up in inet_csk_listen_stop() and the cond_resched()\nthere trips the debug check:\n\nBUG: sleeping function called from invalid context at net/ipv4/inet_connection_sock.c:1523\nin_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 628, name: test_progs\npreempt_count: 0, expected: 0\nRCU nest depth: 1, expected: 0\nlocks held by test_progs/628: 3, last CPU#3:\n #0: ffff8881158cee18 (&p->lock){+.+.}-{4:4}, at: bpf_seq_read+0x56/0x1210\n #1: ffff8881106bb858 (sk_lock-AF_INET6){+.+.}-{0:0}, at: bpf_iter_tcp_seq_show+0x32b/0x4b0\n #2: ffffffffb435af20 (rcu_read_lock){....}-{1:3}, at: bpf_iter_run_prog+0x46b/0xde0\nCPU: 3 UID: 0 PID: 628 Comm: test_progs Tainted: G        W           7.2.0+ #65 PREEMPT\nTainted: [W]=WARN\nCall Trace:\n <TASK>\n dump_stack_lvl+0xc1/0xf0\n dump_stack+0x10/0x20\n __might_resched+0x3d2/0x610\n inet_csk_listen_stop+0x7b/0xbf0\n tcp_abort+0x23b/0x3b0\n bpf_sock_destroy+0xfc/0x140\n bpf_prog_448133d24601754f_iter_tcp6_server+0x81/0x8a\n bpf_iter_run_prog+0x538/0xde0\n bpf_iter_tcp_seq_show+0x26b/0x4b0\n bpf_seq_read+0x424/0x1210\n vfs_read+0x197/0xe40\n ksys_read+0x119/0x240\n __x64_sys_read+0x72/0xc0\n x64_sys_call+0x647/0x27e0\n do_syscall_64+0xe5/0x610\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\nRIP: 0033:0x7fad39b28aca\nRSP: 002b:00007ffc381c61c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000000\nRAX: ffffffffffffffda RBX: 00007ffc381c6a88 RCX: 00007fad39b28aca\nRDX: 0000000000000032 RSI: 00007ffc381c6250 RDI: 0000000000000014\nRBP: 00007ffc381c61e0 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003\nR13: 0000000000000000 R14: 000055f077c1bbb0 R15: 00007fad3a0f3000\n </TASK>\n\nThe commit that added the kfunc already guards lock_sock() in tcp_abort()\nand udp_abort() with has_current_bpf_ctx(), but missed the listener path.\nDo the same for the cond_resched(). The loop runs inside the iterator's\nrcu_read_lock(), it must not reschedule or report a quiescent state there.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:17","updated_at":"2026-10-19 10:19:28"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/eaab8cab451b9502ce224cd202550375b894a467","name":"https://git.kernel.org/stable/c/eaab8cab451b9502ce224cd202550375b894a467","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/55bbebf2829c3f47c5a48fc261740301d0f25f48","name":"https://git.kernel.org/stable/c/55bbebf2829c3f47c5a48fc261740301d0f25f48","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5b52417c6196e05618a3b5d9753dbed9adef0166","name":"https://git.kernel.org/stable/c/5b52417c6196e05618a3b5d9753dbed9adef0166","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/23da88d1597ee7fdda373e1530284b763710911f","name":"https://git.kernel.org/stable/c/23da88d1597ee7fdda373e1530284b763710911f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ee7246bccb9da66076dd8094daa48bdc761d6b76","name":"https://git.kernel.org/stable/c/ee7246bccb9da66076dd8094daa48bdc761d6b76","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98646","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98646","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4ddbcb886268af8d12a23e6640b39d1d9c652b1b 23da88d1597ee7fdda373e1530284b763710911f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4ddbcb886268af8d12a23e6640b39d1d9c652b1b 5b52417c6196e05618a3b5d9753dbed9adef0166 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4ddbcb886268af8d12a23e6640b39d1d9c652b1b 55bbebf2829c3f47c5a48fc261740301d0f25f48 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4ddbcb886268af8d12a23e6640b39d1d9c652b1b ee7246bccb9da66076dd8094daa48bdc761d6b76 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4ddbcb886268af8d12a23e6640b39d1d9c652b1b eaab8cab451b9502ce224cd202550375b894a467 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.5","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.158 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.112 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.55 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.9 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv4/inet_connection_sock.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"23da88d1597ee7fdda373e1530284b763710911f","status":"affected","version":"4ddbcb886268af8d12a23e6640b39d1d9c652b1b","versionType":"git"},{"lessThan":"5b52417c6196e05618a3b5d9753dbed9adef0166","status":"affected","version":"4ddbcb886268af8d12a23e6640b39d1d9c652b1b","versionType":"git"},{"lessThan":"55bbebf2829c3f47c5a48fc261740301d0f25f48","status":"affected","version":"4ddbcb886268af8d12a23e6640b39d1d9c652b1b","versionType":"git"},{"lessThan":"ee7246bccb9da66076dd8094daa48bdc761d6b76","status":"affected","version":"4ddbcb886268af8d12a23e6640b39d1d9c652b1b","versionType":"git"},{"lessThan":"eaab8cab451b9502ce224cd202550375b894a467","status":"affected","version":"4ddbcb886268af8d12a23e6640b39d1d9c652b1b","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv4/inet_connection_sock.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.5"},{"lessThan":"6.5","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.158","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.112","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.55","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.55","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.9","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"6.5","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: Skip cond_resched() in inet_csk_listen_stop() under BPF context\n\nbpf_sock_destroy() runs from the tcp iterator, under rcu_read_lock(). If\nthe sock is a listener that still has children in its accept queue,\ntcp_abort() ends up in inet_csk_listen_stop() and the cond_resched()\nthere trips the debug check:\n\nBUG: sleeping function called from invalid context at net/ipv4/inet_connection_sock.c:1523\nin_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 628, name: test_progs\npreempt_count: 0, expected: 0\nRCU nest depth: 1, expected: 0\nlocks held by test_progs/628: 3, last CPU#3:\n #0: ffff8881158cee18 (&p->lock){+.+.}-{4:4}, at: bpf_seq_read+0x56/0x1210\n #1: ffff8881106bb858 (sk_lock-AF_INET6){+.+.}-{0:0}, at: bpf_iter_tcp_seq_show+0x32b/0x4b0\n #2: ffffffffb435af20 (rcu_read_lock){....}-{1:3}, at: bpf_iter_run_prog+0x46b/0xde0\nCPU: 3 UID: 0 PID: 628 Comm: test_progs Tainted: G        W           7.2.0+ #65 PREEMPT\nTainted: [W]=WARN\nCall Trace:\n <TASK>\n dump_stack_lvl+0xc1/0xf0\n dump_stack+0x10/0x20\n __might_resched+0x3d2/0x610\n inet_csk_listen_stop+0x7b/0xbf0\n tcp_abort+0x23b/0x3b0\n bpf_sock_destroy+0xfc/0x140\n bpf_prog_448133d24601754f_iter_tcp6_server+0x81/0x8a\n bpf_iter_run_prog+0x538/0xde0\n bpf_iter_tcp_seq_show+0x26b/0x4b0\n bpf_seq_read+0x424/0x1210\n vfs_read+0x197/0xe40\n ksys_read+0x119/0x240\n __x64_sys_read+0x72/0xc0\n x64_sys_call+0x647/0x27e0\n do_syscall_64+0xe5/0x610\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\nRIP: 0033:0x7fad39b28aca\nRSP: 002b:00007ffc381c61c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000000\nRAX: ffffffffffffffda RBX: 00007ffc381c6a88 RCX: 00007fad39b28aca\nRDX: 0000000000000032 RSI: 00007ffc381c6250 RDI: 0000000000000014\nRBP: 00007ffc381c61e0 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003\nR13: 0000000000000000 R14: 000055f077c1bbb0 R15: 00007fad3a0f3000\n </TASK>\n\nThe commit that added the kfunc already guards lock_sock() in tcp_abort()\nand udp_abort() with has_current_bpf_ctx(), but missed the listener path.\nDo the same for the cond_resched(). The loop runs inside the iterator's\nrcu_read_lock(), it must not reschedule or report a quiescent state there."}],"providerMetadata":{"dateUpdated":"2026-10-19T09:23:15.900Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/23da88d1597ee7fdda373e1530284b763710911f"},{"url":"https://git.kernel.org/stable/c/5b52417c6196e05618a3b5d9753dbed9adef0166"},{"url":"https://git.kernel.org/stable/c/55bbebf2829c3f47c5a48fc261740301d0f25f48"},{"url":"https://git.kernel.org/stable/c/ee7246bccb9da66076dd8094daa48bdc761d6b76"},{"url":"https://git.kernel.org/stable/c/eaab8cab451b9502ce224cd202550375b894a467"}],"title":"tcp: Skip cond_resched() in inet_csk_listen_stop() under BPF context","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98646","datePublished":"2026-10-18T15:20:17.490Z","dateReserved":"2026-09-25T10:25:14.362Z","dateUpdated":"2026-10-19T09:23:15.900Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:17","lastModifiedDate":"2026-10-19 10:19:28","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98646","Ordinal":"1","Title":"tcp: Skip cond_resched() in inet_csk_listen_stop() under BPF con","CVE":"CVE-2026-98646","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98646","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: Skip cond_resched() in inet_csk_listen_stop() under BPF context\n\nbpf_sock_destroy() runs from the tcp iterator, under rcu_read_lock(). If\nthe sock is a listener that still has children in its accept queue,\ntcp_abort() ends up in inet_csk_listen_stop() and the cond_resched()\nthere trips the debug check:\n\nBUG: sleeping function called from invalid context at net/ipv4/inet_connection_sock.c:1523\nin_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 628, name: test_progs\npreempt_count: 0, expected: 0\nRCU nest depth: 1, expected: 0\nlocks held by test_progs/628: 3, last CPU#3:\n #0: ffff8881158cee18 (&p->lock){+.+.}-{4:4}, at: bpf_seq_read+0x56/0x1210\n #1: ffff8881106bb858 (sk_lock-AF_INET6){+.+.}-{0:0}, at: bpf_iter_tcp_seq_show+0x32b/0x4b0\n #2: ffffffffb435af20 (rcu_read_lock){....}-{1:3}, at: bpf_iter_run_prog+0x46b/0xde0\nCPU: 3 UID: 0 PID: 628 Comm: test_progs Tainted: G        W           7.2.0+ #65 PREEMPT\nTainted: [W]=WARN\nCall Trace:\n <TASK>\n dump_stack_lvl+0xc1/0xf0\n dump_stack+0x10/0x20\n __might_resched+0x3d2/0x610\n inet_csk_listen_stop+0x7b/0xbf0\n tcp_abort+0x23b/0x3b0\n bpf_sock_destroy+0xfc/0x140\n bpf_prog_448133d24601754f_iter_tcp6_server+0x81/0x8a\n bpf_iter_run_prog+0x538/0xde0\n bpf_iter_tcp_seq_show+0x26b/0x4b0\n bpf_seq_read+0x424/0x1210\n vfs_read+0x197/0xe40\n ksys_read+0x119/0x240\n __x64_sys_read+0x72/0xc0\n x64_sys_call+0x647/0x27e0\n do_syscall_64+0xe5/0x610\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\nRIP: 0033:0x7fad39b28aca\nRSP: 002b:00007ffc381c61c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000000\nRAX: ffffffffffffffda RBX: 00007ffc381c6a88 RCX: 00007fad39b28aca\nRDX: 0000000000000032 RSI: 00007ffc381c6250 RDI: 0000000000000014\nRBP: 00007ffc381c61e0 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003\nR13: 0000000000000000 R14: 000055f077c1bbb0 R15: 00007fad3a0f3000\n </TASK>\n\nThe commit that added the kfunc already guards lock_sock() in tcp_abort()\nand udp_abort() with has_current_bpf_ctx(), but missed the listener path.\nDo the same for the cond_resched(). The loop runs inside the iterator's\nrcu_read_lock(), it must not reschedule or report a quiescent state there.","Type":"Description","Title":"tcp: Skip cond_resched() in inet_csk_listen_stop() under BPF con"}]}}}