{ "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" } } } }