CVE-2022-49065

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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 \u2192 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"}}]}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["include/trace/events/sunrpc.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "85ee17ca21cf92989e8c923e3ea4514c291e9d38", "status": "affected", "version": "ece200ddd54b9ce840cfee554fb812560c545c7d", "versionType": "git"}, {"lessThan": "726ae7300fcc25fefa46d188cc07eb16dc908f9e", "status": "affected", "version": "ece200ddd54b9ce840cfee554fb812560c545c7d", "versionType": "git"}, {"lessThan": "c2456f470eea3bd06574d988bf6089e7c3f4c5cc", "status": "affected", "version": "ece200ddd54b9ce840cfee554fb812560c545c7d", "versionType": "git"}, {"lessThan": "4d5004451ab2218eab94a30e1841462c9316ba19", "status": "affected", "version": "ece200ddd54b9ce840cfee554fb812560c545c7d", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["include/trace/events/sunrpc.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.17"}, {"lessThan": "4.17", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.112", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.35", "versionType": "semver"}, {"lessThanOrEqual": "5.17.*", "status": "unaffected", "version": "5.17.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "5.18", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6DEF5532-F330-4A6A-B903-C82DBA088C88", "versionEndExcluding": "5.10.112", "versionStartIncluding": "4.17", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "05ABCC3F-88A9-47F9-9D40-8665747B2E43", "versionEndExcluding": "5.15.35", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E22C86CB-06CD-4D16-AB2A-F21EE8199262", "versionEndExcluding": "5.17.4", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc1:*:*:*:*:*:*", "matchCriteriaId": "6AD94161-84BB-42E6-9882-4FC0C42E9FC1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc2:*:*:*:*:*:*", "matchCriteriaId": "7AB06DDF-3C2B-416D-B448-E990D8FF67A9", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: SUNRPC: Arreglar la clase de seguimiento svc_deferred_event Arreglar un fallo de desreferencia NULL que ocurre cuando se aplaza un svc_rqst mientras el subsistema de seguimiento sunrpc est\u00e1 habilitado. svc_revisit() establece dr->xprt en NULL, por lo que no se puede confiar en \u00e9l en el punto de seguimiento para proporcionar la direcci\u00f3n del control remoto. Desafortunadamente, no podemos revertir el trozo \"svc_deferred_class\" en el commit ece200ddd54b (\"sunrpc: Guardar la direcci\u00f3n de presentaci\u00f3n remota en svc_xprt para eventos de seguimiento\") porque ahora hay una comprobaci\u00f3n espec\u00edfica de especificadores de formato de evento para desreferencias inseguras. La advertencia que emite la comprobaci\u00f3n es: el evento svc_defer_recv tiene una desreferencia insegura del argumento 1 Un especificador de formato \"%pISpc\" con un \"struct sockaddr *\" est\u00e1 marcado por esta comprobaci\u00f3n. En su lugar, adopte el enfoque de fuerza bruta utilizado por el punto de seguimiento svcrdma_qp_error. Convierta el campo dr::addr en una direcci\u00f3n de presentaci\u00f3n en el brazo TP_fast_assign() del evento de seguimiento y almac\u00e9nelo como una cadena. Esta correcci\u00f3n se puede implementar en kernels estables. Mientras tanto, el commit c6ced22997ad (\"seguimiento: Actualizar la comprobaci\u00f3n de impresi\u00f3n fmt para manejar la nueva macro __get_sockaddr()\") ahora est\u00e1 en v5.18, por lo que esta correcci\u00f3n complicada se puede reemplazar con __sockaddr() y similares correctamente durante la ventana de fusi\u00f3n de v5.19."}], "id": "CVE-2022-49065", "lastModified": "2026-08-04T10:17:33.030", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-49065", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T19:49:41.900091Z", "version": "2.0.3"}}]}, "published": "2025-02-26T07:00:43.723", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4d5004451ab2218eab94a30e1841462c9316ba19"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/726ae7300fcc25fefa46d188cc07eb16dc908f9e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/85ee17ca21cf92989e8c923e3ea4514c291e9d38"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c2456f470eea3bd06574d988bf6089e7c3f4c5cc"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-476"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: SUNRPC: Fix the svc_deferred_event trace class", "id": "2347987", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2347987"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nSUNRPC: Fix the svc_deferred_event trace class\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.\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:\nevent svc_defer_recv has unsafe dereference of argument 1\nA \"%pISpc\" format specifier with a \"struct sockaddr *\" is indeed\nflagged by this check.\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.\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."], "name": "CVE-2022-49065", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49065\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49065\nhttps://lore.kernel.org/linux-cve-announce/2025022654-CVE-2022-49065-46dc@gregkh/T"], "threat_severity": "Low"}

{}