{"id":"CVE-2026-23120","revision":null,"records":[{"revision":"27fff00915c6492f8433f806e5157935","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-23120","aliases":[],"title":"l2tp: avoid one data-race in l2tp_tunnel_del_work()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nl2tp: avoid one data-race in l2tp_tunnel_del_work()\n\nWe should read sk->sk_socket only when dealing with kernel sockets.\n\nsyzbot reported the following data-race:\n\nBUG: KCSAN: data-race in l2tp_tunnel_del_work / sk_common_release\n\nwrite to 0xffff88811c182b20 of 8 bytes by task 5365 on cpu 0:\n sk_set_socket include/net/sock.h:2092 [inline]\n sock_orphan include/net/sock.h:2118 [inline]\n sk_common_release+0xae/0x230 net/core/sock.c:4003\n udp_lib_close+0x15/0x20 include/net/udp.h:325\n inet_release+0xce/0xf0 net/ipv4/af_inet.c:437\n __sock_release net/socket.c:662 [inline]\n sock_close+0x6b/0x150 net/socket.c:1455\n __fput+0x29b/0x650 fs/file_table.c:468\n ____fput+0x1c/0x30 fs/file_table.c:496\n task_work_run+0x131/0x1a0 kernel/task_work.c:233\n resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]\n __exit_to_user_mode_loop kernel/entry/common.c:44 [inline]\n exit_to_user_mode_loop+0x1fe/0x740 kernel/entry/common.c:75\n __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]\n syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]\n syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]\n syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]\n do_syscall_64+0x1e1/0x2b0 arch/x86/entry/syscall_64.c:100\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nread to 0xffff88811c182b20 of 8 bytes by task 827 on cpu 1:\n l2tp_tunnel_del_work+0x2f/0x1a0 net/l2tp/l2tp_core.c:1418\n process_one_work kernel/workqueue.c:3257 [inline]\n process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3340\n worker_thread+0x582/0x770 kernel/workqueue.c:3421\n kthread+0x489/0x510 kernel/kthread.c:463\n ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246\n\nvalue changed: 0xffff88811b818000 -> 0x0000000000000000","state":0,"publishedAt":"2026-02-14T15:09:51.223+00:00","modifiedAt":"2026-10-19T18:25:31.962+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/l2tp/l2tp_core.c\"\n ],\n \"versions\": [\n {\n \"version\": \"d00fa9adc528c1b0e64d532556764852df8bd7b9\",\n \"lessThan\": \"1f63ca44b4f419a1663d94d1bb0b4e2beb73fdb4\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d00fa9adc528c1b0e64d532556764852df8bd7b9\",\n \"lessThan\": \"36c40a80109f1771d59558050b1a71e13c60c759\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d00fa9adc528c1b0e64d532556764852df8bd7b9\",\n \"lessThan\": \"eae074dab764ea181bbed5e88626889319177498\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d00fa9adc528c1b0e64d532556764852df8bd7b9\",\n \"lessThan\": \"68e92085427c84e7679ddb53c0d68836d220b6e7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d00fa9adc528c1b0e64d532556764852df8bd7b9\",\n \"lessThan\": \"3d6d414b214ce31659bded2f8df50c93a3769474\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d00fa9adc528c1b0e64d532556764852df8bd7b9\",\n \"lessThan\": \"32d417497b79efb403d75f4c185fe6fd9d64b94f\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d00fa9adc528c1b0e64d532556764852df8bd7b9\",\n \"lessThan\": \"7a29f6bf60f2590fe5e9c4decb451e19afad2bcf\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"15df699fdc5af46a9fb15ae2d9326294852de5b5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"18bdaefc715b4530b4b2fe670506bb47713664cc\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"3.16.57\",\n \"lessThan\": \"3.17\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"4.15.8\",\n \"lessThan\": \"4.16\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/l2tp/l2tp_core.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4.16\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"4.16\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.249\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.199\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.162\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.122\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.68\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.8\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.19\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/1f63ca44b4f419a1663d94d1bb0b4e2beb73fdb4","https://git.kernel.org/stable/c/36c40a80109f1771d59558050b1a71e13c60c759","https://git.kernel.org/stable/c/eae074dab764ea181bbed5e88626889319177498","https://git.kernel.org/stable/c/68e92085427c84e7679ddb53c0d68836d220b6e7","https://git.kernel.org/stable/c/3d6d414b214ce31659bded2f8df50c93a3769474","https://git.kernel.org/stable/c/32d417497b79efb403d75f4c185fe6fd9d64b94f","https://git.kernel.org/stable/c/7a29f6bf60f2590fe5e9c4decb451e19afad2bcf"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23120","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-23120","identifiers":["CVE-2026-23120"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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