{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50676","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-12-09T01:26:45.991Z","datePublished":"2025-12-09T01:29:29.166Z","dateUpdated":"2026-08-05T08:59:22.454Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T08:59:22.454Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: rds: don't hold sock lock when cancelling work from rds_tcp_reset_callbacks()\n\nsyzbot is reporting lockdep warning at rds_tcp_reset_callbacks() [1], for\ncommit ac3615e7f3cffe2a (\"RDS: TCP: Reduce code duplication in\nrds_tcp_reset_callbacks()\") added cancel_delayed_work_sync() into a section\nprotected by lock_sock() without realizing that rds_send_xmit() might call\nlock_sock().\n\nWe don't need to protect cancel_delayed_work_sync() using lock_sock(), for\neven if rds_{send,recv}_worker() re-queued this work while __flush_work()\n from cancel_delayed_work_sync() was waiting for this work to complete,\nretried rds_{send,recv}_worker() is no-op due to the absence of RDS_CONN_UP\nbit."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:N - The vulnerable rds_tcp_reset_callbacks() path is reached from rds_tcp_accept_one() when a remote peer TCP-connects to the RDS/TCP listener on port 16385 during duelling-SYN/reconnect handling; in an RDS-cluster deployment this is a network-facing path without requiring a local syscall.\nAC:L - A remote peer can drive reconnects while send/recv workers are active (normal RDS traffic), controlling both sides of the lock-ordering race; no rare victim-only state beyond an active RDS/TCP deployment is required.\nPR:N - The RDS/TCP accept path performs no peer authentication or credential check before reaching rds_tcp_reset_callbacks(); connecting to the listener is sufficient.\nUI:N - No victim action is required; the attacker triggers the path by initiating TCP reconnect/duelling-SYN sequences against the RDS listener.\nS:U - Impact is confined to kernel locking/availability on the same host; it does not cross a VM, IOMMU, or other separate security boundary.\nC:N - This is a circular locking dependency / deadlock only; there is no memory disclosure, OOB read, or UAF read primitive.\nI:N - There is no memory corruption or write primitive; the fix only reorders cancel_delayed_work_sync() relative to lock_sock(), with no integrity-impacting exploit path.\nA:H - Holding the socket lock across cancel_delayed_work_sync() can deadlock against rds_send_worker/rds_recv_worker (which take the same sock lock via cork/recv), hanging the RDS workqueue and denying service."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/rds/tcp.c"],"versions":[{"version":"ac3615e7f3cffe2a1a6b25172dfd09e138593d82","lessThan":"5d2ba255e93211e541373469dffbda7c99dfa0e5","status":"affected","versionType":"git"},{"version":"ac3615e7f3cffe2a1a6b25172dfd09e138593d82","lessThan":"2425007c0967a7c04b0dee7cce05ecf0ca869ad1","status":"affected","versionType":"git"},{"version":"ac3615e7f3cffe2a1a6b25172dfd09e138593d82","lessThan":"e3cb25d3ad08f5dbd53ce2b31720cad529944322","status":"affected","versionType":"git"},{"version":"ac3615e7f3cffe2a1a6b25172dfd09e138593d82","lessThan":"360aa7219285fac63dab99706a16f2daf3222abe","status":"affected","versionType":"git"},{"version":"ac3615e7f3cffe2a1a6b25172dfd09e138593d82","lessThan":"da349221c4d2d4ac5f606c1c3b36d4ef0b3e6a0c","status":"affected","versionType":"git"},{"version":"ac3615e7f3cffe2a1a6b25172dfd09e138593d82","lessThan":"30bfa5aa7228eb1e67663d67e553627e572cc717","status":"affected","versionType":"git"},{"version":"ac3615e7f3cffe2a1a6b25172dfd09e138593d82","lessThan":"c380c28ab9b15fc53565909c814f6dd3e7f77c4b","status":"affected","versionType":"git"},{"version":"ac3615e7f3cffe2a1a6b25172dfd09e138593d82","lessThan":"afe7053c390fe8ff27d0c2ceaece5625283044ba","status":"affected","versionType":"git"},{"version":"ac3615e7f3cffe2a1a6b25172dfd09e138593d82","lessThan":"a91b750fd6629354460282bbf5146c01b05c4859","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/rds/tcp.c"],"versions":[{"version":"4.8","status":"affected"},{"version":"0","lessThan":"4.8","status":"unaffected","versionType":"semver"},{"version":"4.9.331","lessThanOrEqual":"4.9.*","status":"unaffected","versionType":"semver"},{"version":"4.14.296","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.262","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.220","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.150","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.75","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"5.19.17","lessThanOrEqual":"5.19.*","status":"unaffected","versionType":"semver"},{"version":"6.0.3","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":"4.8","versionEndExcluding":"4.9.331"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"4.14.296"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"4.19.262"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"5.4.220"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"5.10.150"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"5.15.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"5.19.17"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.0.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/5d2ba255e93211e541373469dffbda7c99dfa0e5"},{"url":"https://git.kernel.org/stable/c/2425007c0967a7c04b0dee7cce05ecf0ca869ad1"},{"url":"https://git.kernel.org/stable/c/e3cb25d3ad08f5dbd53ce2b31720cad529944322"},{"url":"https://git.kernel.org/stable/c/360aa7219285fac63dab99706a16f2daf3222abe"},{"url":"https://git.kernel.org/stable/c/da349221c4d2d4ac5f606c1c3b36d4ef0b3e6a0c"},{"url":"https://git.kernel.org/stable/c/30bfa5aa7228eb1e67663d67e553627e572cc717"},{"url":"https://git.kernel.org/stable/c/c380c28ab9b15fc53565909c814f6dd3e7f77c4b"},{"url":"https://git.kernel.org/stable/c/afe7053c390fe8ff27d0c2ceaece5625283044ba"},{"url":"https://git.kernel.org/stable/c/a91b750fd6629354460282bbf5146c01b05c4859"}],"title":"net: rds: don't hold sock lock when cancelling work from rds_tcp_reset_callbacks()","x_generator":{"engine":"bippy-1.2.0"}}}}