CVE-2025-21775 (GCVE-0-2025-21775)

Vulnerability from cvelistv5 – Published: 2025-02-27 02:18 – Updated: 2026-05-11 21:06
VLAI
Title
can: ctucanfd: handle skb allocation failure
Summary
In the Linux kernel, the following vulnerability has been resolved: can: ctucanfd: handle skb allocation failure If skb allocation fails, the pointer to struct can_frame is NULL. This is actually handled everywhere inside ctucan_err_interrupt() except for the only place. Add the missed NULL check. Found by Linux Verification Center (linuxtesting.org) with SVACE static analysis tool.
Severity
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 19:30 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2dcb8e8782d8e4c38903bf37b1a24d3ffd193da7 , < 84b9ac59978a6a4e0812d1c938fad97306272cef (git)
Affected: 2dcb8e8782d8e4c38903bf37b1a24d3ffd193da7 , < e505b83b9ee6aa0ae2f4395f573a66579ae403fb (git)
Affected: 2dcb8e8782d8e4c38903bf37b1a24d3ffd193da7 , < b0e592dd46a0a952b41c3bf6c963afdd6a42b526 (git)
Affected: 2dcb8e8782d8e4c38903bf37b1a24d3ffd193da7 , < e7e2e2318b1f085044126ba553a4e619842fc36d (git)
Affected: 2dcb8e8782d8e4c38903bf37b1a24d3ffd193da7 , < 9bd24927e3eeb85642c7baa3b28be8bea6c2a078 (git)
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Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.129 , ≤ 6.1.* (semver)
Unaffected: 6.6.79 , ≤ 6.6.* (semver)
Unaffected: 6.12.16 , ≤ 6.12.* (semver)
Unaffected: 6.13.4 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-29T01:27:52Z",
      "cve": "CVE-2025-21775",
      "id": "CVE-2025-21775",
      "initial_release_date": "2025-02-28T02:21:00Z",
      "product_status:known_affected": "461",
      "product_status:known_not_affected": "343",
      "product_status:recommended": "357",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-21775",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-21775.json",
      "version": "46"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
              "dateUpdated": "2025-11-03T19:37:28.523Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
            },
            "references": [
              {
                "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"
              }
            ],
            "title": "CVE Program Container"
          },
          {
            "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-2025-21775",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-10-01T19:30:28.979689Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-476",
                    "description": "CWE-476 NULL Pointer Dereference",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-10-01T16:56:09.092Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/net/can/ctucanfd/ctucanfd_base.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "84b9ac59978a6a4e0812d1c938fad97306272cef",
                  "status": "affected",
                  "version": "2dcb8e8782d8e4c38903bf37b1a24d3ffd193da7",
                  "versionType": "git"
                },
                {
                  "lessThan": "e505b83b9ee6aa0ae2f4395f573a66579ae403fb",
                  "status": "affected",
                  "version": "2dcb8e8782d8e4c38903bf37b1a24d3ffd193da7",
                  "versionType": "git"
                },
                {
                  "lessThan": "b0e592dd46a0a952b41c3bf6c963afdd6a42b526",
                  "status": "affected",
                  "version": "2dcb8e8782d8e4c38903bf37b1a24d3ffd193da7",
                  "versionType": "git"
                },
                {
                  "lessThan": "e7e2e2318b1f085044126ba553a4e619842fc36d",
                  "status": "affected",
                  "version": "2dcb8e8782d8e4c38903bf37b1a24d3ffd193da7",
                  "versionType": "git"
                },
                {
                  "lessThan": "9bd24927e3eeb85642c7baa3b28be8bea6c2a078",
                  "status": "affected",
                  "version": "2dcb8e8782d8e4c38903bf37b1a24d3ffd193da7",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/net/can/ctucanfd/ctucanfd_base.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "5.19"
                },
                {
                  "lessThan": "5.19",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.129",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.79",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.12.*",
                  "status": "unaffected",
                  "version": "6.12.16",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.13.*",
                  "status": "unaffected",
                  "version": "6.13.4",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.14",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.129",
                      "versionStartIncluding": "5.19",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.79",
                      "versionStartIncluding": "5.19",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.12.16",
                      "versionStartIncluding": "5.19",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.13.4",
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                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                      "versionStartIncluding": "5.19",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: ctucanfd: handle skb allocation failure\n\nIf skb allocation fails, the pointer to struct can_frame is NULL. This\nis actually handled everywhere inside ctucan_err_interrupt() except for\nthe only place.\n\nAdd the missed NULL check.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE static\nanalysis tool."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T21:06:11.286Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/84b9ac59978a6a4e0812d1c938fad97306272cef"
            },
            {
              "url": "https://git.kernel.org/stable/c/e505b83b9ee6aa0ae2f4395f573a66579ae403fb"
            },
            {
              "url": "https://git.kernel.org/stable/c/b0e592dd46a0a952b41c3bf6c963afdd6a42b526"
            },
            {
              "url": "https://git.kernel.org/stable/c/e7e2e2318b1f085044126ba553a4e619842fc36d"
            },
            {
              "url": "https://git.kernel.org/stable/c/9bd24927e3eeb85642c7baa3b28be8bea6c2a078"
            }
          ],
          "title": "can: ctucanfd: handle skb allocation failure",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2025-21775",
        "datePublished": "2025-02-27T02:18:21.019Z",
        "dateReserved": "2024-12-29T08:45:45.763Z",
        "dateUpdated": "2026-05-11T21:06:11.286Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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

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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.
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  • 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.



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.