CVE-2022-49065 (GCVE-0-2022-49065)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:54 – Updated: 2026-08-05 08:53
VLAI
Title
SUNRPC: Fix the svc_deferred_event trace class
Summary
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Fix the svc_deferred_event trace class Fix a NULL deref crash that occurs when an svc_rqst is deferred while the sunrpc tracing subsystem is enabled. svc_revisit() sets dr->xprt to NULL, so it can't be relied upon in the tracepoint to provide the remote's address. Unfortunately we can't revert the "svc_deferred_class" hunk in commit ece200ddd54b ("sunrpc: Save remote presentation address in svc_xprt for trace events") because there is now a specific check of event format specifiers for unsafe dereferences. The warning that check emits is: event svc_defer_recv has unsafe dereference of argument 1 A "%pISpc" format specifier with a "struct sockaddr *" is indeed flagged by this check. Instead, take the brute-force approach used by the svcrdma_qp_error tracepoint. Convert the dr::addr field into a presentation address in the TP_fast_assign() arm of the trace event, and store that as a string. This fix can be backported to -stable kernels. In the meantime, commit c6ced22997ad ("tracing: Update print fmt check to handle new __get_sockaddr() macro") is now in v5.18, so this wonky fix can be replaced with __sockaddr() and friends properly during the v5.19 merge window.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 19:49 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ece200ddd54b9ce840cfee554fb812560c545c7d , < 85ee17ca21cf92989e8c923e3ea4514c291e9d38 (git)
Affected: ece200ddd54b9ce840cfee554fb812560c545c7d , < 726ae7300fcc25fefa46d188cc07eb16dc908f9e (git)
Affected: ece200ddd54b9ce840cfee554fb812560c545c7d , < c2456f470eea3bd06574d988bf6089e7c3f4c5cc (git)
Affected: ece200ddd54b9ce840cfee554fb812560c545c7d , < 4d5004451ab2218eab94a30e1841462c9316ba19 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.17
Unaffected: 0 , < 4.17 (semver)
Unaffected: 5.10.112 , ≤ 5.10.* (semver)
Unaffected: 5.15.35 , ≤ 5.15.* (semver)
Unaffected: 5.17.4 , ≤ 5.17.* (semver)
Unaffected: 5.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-49065",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T19:49:41.900091Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-476",
                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T19:57:06.151Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.112",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.35",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.17.4",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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-\u003exprt to NULL, so it can\u0027t be relied upon in the tracepoint to\nprovide the remote\u0027s address.\n\nUnfortunately we can\u0027t 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": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "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-\u003exprt 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-\u003exprt in the enabled svc_defer_queue/svc_defer_recv tracepoint causes a kernel oops/panic in the nfsd/lockd service path, fully denying availability."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:53:42.252Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49065",
    "datePublished": "2025-02-26T01:54:33.881Z",
    "dateReserved": "2025-02-26T01:49:39.244Z",
    "dateUpdated": "2026-08-05T08:53:42.252Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-49065",
      "date": "2026-10-30",
      "epss": "0.00644",
      "percentile": "0.50844"
    },
    "nvd": {
      "cve": {
        "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-\u003exprt to NULL, so it can\u0027t be relied upon in the tracepoint to\nprovide the remote\u0027s address.\n\nUnfortunately we can\u0027t 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-\u0026gt;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"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-19T10:33:57+00:00",
      "cve": "CVE-2022-49065",
      "id": "CVE-2022-49065",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: SUNRPC: Fix the svc_deferred_event trace class",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49065.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "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"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2022-49065",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-10-01T19:49:41.900091Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-476",
                    "description": "CWE-476 NULL Pointer Dereference",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-10-01T16:03:59.252Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "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"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.112",
                      "versionStartIncluding": "4.17",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.35",
                      "versionStartIncluding": "4.17",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.17.4",
                      "versionStartIncluding": "4.17",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.18",
                      "versionStartIncluding": "4.17",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "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-\u003exprt to NULL, so it can\u0027t be relied upon in the tracepoint to\nprovide the remote\u0027s address.\n\nUnfortunately we can\u0027t 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": {
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "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-\u003exprt 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-\u003exprt in the enabled svc_defer_queue/svc_defer_recv tracepoint causes a kernel oops/panic in the nfsd/lockd service path, fully denying availability."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T08:53:42.252Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "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"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-49065",
        "datePublished": "2025-02-26T01:54:33.881Z",
        "dateReserved": "2025-02-26T01:49:39.244Z",
        "dateUpdated": "2026-08-05T08:53:42.252Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.