CVE-2025-71182 (GCVE-0-2025-71182)

Vulnerability from cvelistv5 – Published: 2026-01-31 11:38 – Updated: 2026-02-09 08:36
VLAI?
Title
can: j1939: make j1939_session_activate() fail if device is no longer registered
Summary
In the Linux kernel, the following vulnerability has been resolved: can: j1939: make j1939_session_activate() fail if device is no longer registered syzbot is still reporting unregister_netdevice: waiting for vcan0 to become free. Usage count = 2 even after commit 93a27b5891b8 ("can: j1939: add missing calls in NETDEV_UNREGISTER notification handler") was added. A debug printk() patch found that j1939_session_activate() can succeed even after j1939_cancel_active_session() from j1939_netdev_notify(NETDEV_UNREGISTER) has completed. Since j1939_cancel_active_session() is processed with the session list lock held, checking ndev->reg_state in j1939_session_activate() with the session list lock held can reliably close the race window.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < ebb0dfd718dd31c8d3600612ca4b7207ec3d923a (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < c3a4316e3c746af415c0fd6c6d489ad13f53714d (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < 46ca9dc978923c5e1247a9e9519240ba7ace413c (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < 78d87b72cebe2a993fd5b017e9f14fb6278f2eae (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536 (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < 79dd3f1d9dd310c2af89b09c71f34d93973b200f (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < 5d5602236f5db19e8b337a2cd87a90ace5ea776d (git)
Create a notification for this product.
    Linux Linux Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.10.248 , ≤ 5.10.* (semver)
Unaffected: 5.15.198 , ≤ 5.15.* (semver)
Unaffected: 6.1.161 , ≤ 6.1.* (semver)
Unaffected: 6.6.121 , ≤ 6.6.* (semver)
Unaffected: 6.12.66 , ≤ 6.12.* (semver)
Unaffected: 6.18.6 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/can/j1939/transport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ebb0dfd718dd31c8d3600612ca4b7207ec3d923a",
              "status": "affected",
              "version": "9d71dd0c70099914fcd063135da3c580865e924c",
              "versionType": "git"
            },
            {
              "lessThan": "c3a4316e3c746af415c0fd6c6d489ad13f53714d",
              "status": "affected",
              "version": "9d71dd0c70099914fcd063135da3c580865e924c",
              "versionType": "git"
            },
            {
              "lessThan": "46ca9dc978923c5e1247a9e9519240ba7ace413c",
              "status": "affected",
              "version": "9d71dd0c70099914fcd063135da3c580865e924c",
              "versionType": "git"
            },
            {
              "lessThan": "78d87b72cebe2a993fd5b017e9f14fb6278f2eae",
              "status": "affected",
              "version": "9d71dd0c70099914fcd063135da3c580865e924c",
              "versionType": "git"
            },
            {
              "lessThan": "ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536",
              "status": "affected",
              "version": "9d71dd0c70099914fcd063135da3c580865e924c",
              "versionType": "git"
            },
            {
              "lessThan": "79dd3f1d9dd310c2af89b09c71f34d93973b200f",
              "status": "affected",
              "version": "9d71dd0c70099914fcd063135da3c580865e924c",
              "versionType": "git"
            },
            {
              "lessThan": "5d5602236f5db19e8b337a2cd87a90ace5ea776d",
              "status": "affected",
              "version": "9d71dd0c70099914fcd063135da3c580865e924c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/can/j1939/transport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.4"
            },
            {
              "lessThan": "5.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.248",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.198",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.161",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.121",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.66",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.248",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.198",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.161",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.121",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.66",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.6",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: j1939: make j1939_session_activate() fail if device is no longer registered\n\nsyzbot is still reporting\n\n  unregister_netdevice: waiting for vcan0 to become free. Usage count = 2\n\neven after commit 93a27b5891b8 (\"can: j1939: add missing calls in\nNETDEV_UNREGISTER notification handler\") was added. A debug printk() patch\nfound that j1939_session_activate() can succeed even after\nj1939_cancel_active_session() from j1939_netdev_notify(NETDEV_UNREGISTER)\nhas completed.\n\nSince j1939_cancel_active_session() is processed with the session list lock\nheld, checking ndev-\u003ereg_state in j1939_session_activate() with the session\nlist lock held can reliably close the race window."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T08:36:06.320Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ebb0dfd718dd31c8d3600612ca4b7207ec3d923a"
        },
        {
          "url": "https://git.kernel.org/stable/c/c3a4316e3c746af415c0fd6c6d489ad13f53714d"
        },
        {
          "url": "https://git.kernel.org/stable/c/46ca9dc978923c5e1247a9e9519240ba7ace413c"
        },
        {
          "url": "https://git.kernel.org/stable/c/78d87b72cebe2a993fd5b017e9f14fb6278f2eae"
        },
        {
          "url": "https://git.kernel.org/stable/c/ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536"
        },
        {
          "url": "https://git.kernel.org/stable/c/79dd3f1d9dd310c2af89b09c71f34d93973b200f"
        },
        {
          "url": "https://git.kernel.org/stable/c/5d5602236f5db19e8b337a2cd87a90ace5ea776d"
        }
      ],
      "title": "can: j1939: make j1939_session_activate() fail if device is no longer registered",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71182",
    "datePublished": "2026-01-31T11:38:55.157Z",
    "dateReserved": "2026-01-31T11:36:51.185Z",
    "dateUpdated": "2026-02-09T08:36:06.320Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-71182\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-31T12:16:03.463\",\"lastModified\":\"2026-02-03T16:44:36.630\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncan: j1939: make j1939_session_activate() fail if device is no longer registered\\n\\nsyzbot is still reporting\\n\\n  unregister_netdevice: waiting for vcan0 to become free. Usage count = 2\\n\\neven after commit 93a27b5891b8 (\\\"can: j1939: add missing calls in\\nNETDEV_UNREGISTER notification handler\\\") was added. A debug printk() patch\\nfound that j1939_session_activate() can succeed even after\\nj1939_cancel_active_session() from j1939_netdev_notify(NETDEV_UNREGISTER)\\nhas completed.\\n\\nSince j1939_cancel_active_session() is processed with the session list lock\\nheld, checking ndev-\u003ereg_state in j1939_session_activate() with the session\\nlist lock held can reliably close the race window.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/46ca9dc978923c5e1247a9e9519240ba7ace413c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5d5602236f5db19e8b337a2cd87a90ace5ea776d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/78d87b72cebe2a993fd5b017e9f14fb6278f2eae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/79dd3f1d9dd310c2af89b09c71f34d93973b200f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c3a4316e3c746af415c0fd6c6d489ad13f53714d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ebb0dfd718dd31c8d3600612ca4b7207ec3d923a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.



Detection rules are retrieved from Rulezet.