{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49065", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T01:49:39.244Z", "datePublished": "2025-02-26T01:54:33.881Z", "dateUpdated": "2026-08-05T08:53:42.252Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:53:42.252Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: Fix the svc_deferred_event trace class\n\nFix a NULL deref crash that occurs when an svc_rqst is deferred\nwhile the sunrpc tracing subsystem is enabled. svc_revisit() sets\ndr->xprt to NULL, so it can't be relied upon in the tracepoint to\nprovide the remote's address.\n\nUnfortunately we can't revert the \"svc_deferred_class\" hunk in\ncommit ece200ddd54b (\"sunrpc: Save remote presentation address in\nsvc_xprt for trace events\") because there is now a specific check\nof event format specifiers for unsafe dereferences. The warning\nthat check emits is:\n\n event svc_defer_recv has unsafe dereference of argument 1\n\nA \"%pISpc\" format specifier with a \"struct sockaddr *\" is indeed\nflagged by this check.\n\nInstead, take the brute-force approach used by the svcrdma_qp_error\ntracepoint. Convert the dr::addr field into a presentation address\nin the TP_fast_assign() arm of the trace event, and store that as\na string. This fix can be backported to -stable kernels.\n\nIn the meantime, commit c6ced22997ad (\"tracing: Update print fmt\ncheck to handle new __get_sockaddr() macro\") is now in v5.18, so\nthis wonky fix can be replaced with __sockaddr() and friends\nproperly during the v5.19 merge window." } ], "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 bug is in the SUNRPC server deferred-request path used by nfsd and lockd; a remote NFS/NLM peer drives svc_defer → svc_revisit/svc_deferred_recv over TCP/UDP without local access.\nAC:L - With the sunrpc svc_defer_* trace events enabled (a realistic NFS debugging/observability deployment), a remote peer can deterministically force request deferral via auth/export/idmap cache misses and hit the NULL deref with no race or layout dependency.\nPR:N - Deferral runs during svcauth_unix_set_client (AUTH_NULL/AUTH_UNIX) and related cache_check paths before meaningful credentials are established, so an unauthenticated network peer reaching nfsd/lockd is sufficient.\nUI:N - The attacker triggers the path solely by sending RPC traffic that causes a cache deferral/revisit; no victim user action is required.\nS:U - The resulting kernel oops stays within the NFS server host kernel under the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:N - This is a pure NULL dereference of dr->xprt in the tracepoint TP_fast_assign path with no out-of-bounds read, UAF, or other disclosure primitive.\nI:N - The fault is a NULL pointer read of xpt_remotebuf with no memory corruption, write primitive, or control-flow hijack beyond the ensuing oops.\nA:H - Dereferencing NULL dr->xprt in the enabled svc_defer_queue/svc_defer_recv tracepoint causes a kernel oops/panic in the nfsd/lockd service path, fully denying availability." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/trace/events/sunrpc.h" ], "versions": [ { "version": "ece200ddd54b9ce840cfee554fb812560c545c7d", "lessThan": "85ee17ca21cf92989e8c923e3ea4514c291e9d38", "status": "affected", "versionType": "git" }, { "version": "ece200ddd54b9ce840cfee554fb812560c545c7d", "lessThan": "726ae7300fcc25fefa46d188cc07eb16dc908f9e", "status": "affected", "versionType": "git" }, { "version": "ece200ddd54b9ce840cfee554fb812560c545c7d", "lessThan": "c2456f470eea3bd06574d988bf6089e7c3f4c5cc", "status": "affected", "versionType": "git" }, { "version": "ece200ddd54b9ce840cfee554fb812560c545c7d", "lessThan": "4d5004451ab2218eab94a30e1841462c9316ba19", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/trace/events/sunrpc.h" ], "versions": [ { "version": "4.17", "status": "affected" }, { "version": "0", "lessThan": "4.17", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.112", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.35", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17.4", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18", "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": "4.17", "versionEndExcluding": "5.10.112" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.15.35" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.17.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.18" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/85ee17ca21cf92989e8c923e3ea4514c291e9d38" }, { "url": "https://git.kernel.org/stable/c/726ae7300fcc25fefa46d188cc07eb16dc908f9e" }, { "url": "https://git.kernel.org/stable/c/c2456f470eea3bd06574d988bf6089e7c3f4c5cc" }, { "url": "https://git.kernel.org/stable/c/4d5004451ab2218eab94a30e1841462c9316ba19" } ], "title": "SUNRPC: Fix the svc_deferred_event trace class", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2022-49065", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2025-10-01T19:49:41.900091Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T19:57:06.151Z" } } ] } }