{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50291","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-09-15T14:18:36.811Z","datePublished":"2025-09-15T14:45:47.510Z","dateUpdated":"2026-05-11T19:16:28.446Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:16:28.446Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nkcm: annotate data-races around kcm->rx_psock\n\nkcm->rx_psock can be read locklessly in kcm_rfree().\nAnnotate the read and writes accordingly.\n\nWe do the same for kcm->rx_wait in the following patch.\n\nsyzbot reported:\nBUG: KCSAN: data-race in kcm_rfree / unreserve_rx_kcm\n\nwrite to 0xffff888123d827b8 of 8 bytes by task 2758 on cpu 1:\nunreserve_rx_kcm+0x72/0x1f0 net/kcm/kcmsock.c:313\nkcm_rcv_strparser+0x2b5/0x3a0 net/kcm/kcmsock.c:373\n__strp_recv+0x64c/0xd20 net/strparser/strparser.c:301\nstrp_recv+0x6d/0x80 net/strparser/strparser.c:335\ntcp_read_sock+0x13e/0x5a0 net/ipv4/tcp.c:1703\nstrp_read_sock net/strparser/strparser.c:358 [inline]\ndo_strp_work net/strparser/strparser.c:406 [inline]\nstrp_work+0xe8/0x180 net/strparser/strparser.c:415\nprocess_one_work+0x3d3/0x720 kernel/workqueue.c:2289\nworker_thread+0x618/0xa70 kernel/workqueue.c:2436\nkthread+0x1a9/0x1e0 kernel/kthread.c:376\nret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\n\nread to 0xffff888123d827b8 of 8 bytes by task 5859 on cpu 0:\nkcm_rfree+0x14c/0x220 net/kcm/kcmsock.c:181\nskb_release_head_state+0x8e/0x160 net/core/skbuff.c:841\nskb_release_all net/core/skbuff.c:852 [inline]\n__kfree_skb net/core/skbuff.c:868 [inline]\nkfree_skb_reason+0x5c/0x260 net/core/skbuff.c:891\nkfree_skb include/linux/skbuff.h:1216 [inline]\nkcm_recvmsg+0x226/0x2b0 net/kcm/kcmsock.c:1161\n____sys_recvmsg+0x16c/0x2e0\n___sys_recvmsg net/socket.c:2743 [inline]\ndo_recvmmsg+0x2f1/0x710 net/socket.c:2837\n__sys_recvmmsg net/socket.c:2916 [inline]\n__do_sys_recvmmsg net/socket.c:2939 [inline]\n__se_sys_recvmmsg net/socket.c:2932 [inline]\n__x64_sys_recvmmsg+0xde/0x160 net/socket.c:2932\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\ndo_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nvalue changed: 0xffff88812971ce00 -> 0x0000000000000000\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 0 PID: 5859 Comm: syz-executor.3 Not tainted 6.0.0-syzkaller-12189-g19d17ab7c68b-dirty #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/kcm/kcmsock.c"],"versions":[{"version":"ab7ac4eb9832e32a09f4e8042705484d2fb0aad3","lessThan":"13dba69e18d04c8eec7596369f2a0596b0260275","status":"affected","versionType":"git"},{"version":"ab7ac4eb9832e32a09f4e8042705484d2fb0aad3","lessThan":"bf46af730e58d340f6f740bc69a07c5f6b85c655","status":"affected","versionType":"git"},{"version":"ab7ac4eb9832e32a09f4e8042705484d2fb0aad3","lessThan":"1b8a5692ab25db4ef1c2cc8e5d21f7a65dc3d079","status":"affected","versionType":"git"},{"version":"ab7ac4eb9832e32a09f4e8042705484d2fb0aad3","lessThan":"e94395e916b48a5b912a0a04570981b5b091acb0","status":"affected","versionType":"git"},{"version":"ab7ac4eb9832e32a09f4e8042705484d2fb0aad3","lessThan":"c325f92d8d9b223d5842609ca067e898e9d34566","status":"affected","versionType":"git"},{"version":"ab7ac4eb9832e32a09f4e8042705484d2fb0aad3","lessThan":"342d918cf9a45df9cf11bbe7162b851adefd178f","status":"affected","versionType":"git"},{"version":"ab7ac4eb9832e32a09f4e8042705484d2fb0aad3","lessThan":"12a0eb340c9a22e0f8c00d2c0c1a60695ead926a","status":"affected","versionType":"git"},{"version":"ab7ac4eb9832e32a09f4e8042705484d2fb0aad3","lessThan":"15e4dabda11b0fa31d510a915d1a580f47dfc92e","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/kcm/kcmsock.c"],"versions":[{"version":"4.6","status":"affected"},{"version":"0","lessThan":"4.6","status":"unaffected","versionType":"semver"},{"version":"4.9.332","lessThanOrEqual":"4.9.*","status":"unaffected","versionType":"semver"},{"version":"4.14.298","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.264","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.223","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.153","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.77","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.0.7","lessThanOrEqual":"6.0.*","status":"unaffected","versionType":"semver"},{"version":"6.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"4.9.332"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"4.14.298"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"4.19.264"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"5.4.223"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"5.10.153"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"5.15.77"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.0.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/13dba69e18d04c8eec7596369f2a0596b0260275"},{"url":"https://git.kernel.org/stable/c/bf46af730e58d340f6f740bc69a07c5f6b85c655"},{"url":"https://git.kernel.org/stable/c/1b8a5692ab25db4ef1c2cc8e5d21f7a65dc3d079"},{"url":"https://git.kernel.org/stable/c/e94395e916b48a5b912a0a04570981b5b091acb0"},{"url":"https://git.kernel.org/stable/c/c325f92d8d9b223d5842609ca067e898e9d34566"},{"url":"https://git.kernel.org/stable/c/342d918cf9a45df9cf11bbe7162b851adefd178f"},{"url":"https://git.kernel.org/stable/c/12a0eb340c9a22e0f8c00d2c0c1a60695ead926a"},{"url":"https://git.kernel.org/stable/c/15e4dabda11b0fa31d510a915d1a580f47dfc92e"}],"title":"kcm: annotate data-races around kcm->rx_psock","x_generator":{"engine":"bippy-1.2.0"}}}}