{"id":"CVE-2025-71182","state":"PUBLISHED","title":"can: j1939: make j1939_session_activate() fail if device is no longer registered","description":"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->reg_state in j1939_session_activate() with the session\nlist lock held can reliably close the race window.","publishedAt":"2026-01-31T11:38:55.157Z","updatedAt":"2026-10-19T18:15:16.548Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9d71dd0c70099914fcd063135da3c580865e924c","status":"affected","lessThan":"ebb0dfd718dd31c8d3600612ca4b7207ec3d923a","versionType":"git"},{"version":"9d71dd0c70099914fcd063135da3c580865e924c","status":"affected","lessThan":"c3a4316e3c746af415c0fd6c6d489ad13f53714d","versionType":"git"},{"version":"9d71dd0c70099914fcd063135da3c580865e924c","status":"affected","lessThan":"46ca9dc978923c5e1247a9e9519240ba7ace413c","versionType":"git"},{"version":"9d71dd0c70099914fcd063135da3c580865e924c","status":"affected","lessThan":"78d87b72cebe2a993fd5b017e9f14fb6278f2eae","versionType":"git"},{"version":"9d71dd0c70099914fcd063135da3c580865e924c","status":"affected","lessThan":"ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536","versionType":"git"},{"version":"9d71dd0c70099914fcd063135da3c580865e924c","status":"affected","lessThan":"79dd3f1d9dd310c2af89b09c71f34d93973b200f","versionType":"git"},{"version":"9d71dd0c70099914fcd063135da3c580865e924c","status":"affected","lessThan":"5d5602236f5db19e8b337a2cd87a90ace5ea776d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/j1939/transport.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.4","versionType":"semver"},{"version":"5.10.248","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.198","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.161","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.121","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.66","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.6","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/j1939/transport.c"]}],"references":["https://git.kernel.org/stable/c/ebb0dfd718dd31c8d3600612ca4b7207ec3d923a","https://git.kernel.org/stable/c/c3a4316e3c746af415c0fd6c6d489ad13f53714d","https://git.kernel.org/stable/c/46ca9dc978923c5e1247a9e9519240ba7ace413c","https://git.kernel.org/stable/c/78d87b72cebe2a993fd5b017e9f14fb6278f2eae","https://git.kernel.org/stable/c/ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536","https://git.kernel.org/stable/c/79dd3f1d9dd310c2af89b09c71f34d93973b200f","https://git.kernel.org/stable/c/5d5602236f5db19e8b337a2cd87a90ace5ea776d"],"weaknesses":["CWE-362"],"ingestedAt":"2026-10-29T20:10:04.440Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/71xxx/CVE-2025-71182.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-71182","state":"PUBLISHED","datePublished":"2026-01-31T11:38:55.157Z","dateUpdated":"2026-10-19T18:15:16.548Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-31T11:36:51.185Z"},"containers":{"cna":{"title":"can: j1939: make j1939_session_activate() fail if device is no longer registered","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->reg_state in j1939_session_activate() with the session\nlist lock held can reliably close the race window."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9d71dd0c70099914fcd063135da3c580865e924c","status":"affected","lessThan":"ebb0dfd718dd31c8d3600612ca4b7207ec3d923a","versionType":"git"},{"version":"9d71dd0c70099914fcd063135da3c580865e924c","status":"affected","lessThan":"c3a4316e3c746af415c0fd6c6d489ad13f53714d","versionType":"git"},{"version":"9d71dd0c70099914fcd063135da3c580865e924c","status":"affected","lessThan":"46ca9dc978923c5e1247a9e9519240ba7ace413c","versionType":"git"},{"version":"9d71dd0c70099914fcd063135da3c580865e924c","status":"affected","lessThan":"78d87b72cebe2a993fd5b017e9f14fb6278f2eae","versionType":"git"},{"version":"9d71dd0c70099914fcd063135da3c580865e924c","status":"affected","lessThan":"ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536","versionType":"git"},{"version":"9d71dd0c70099914fcd063135da3c580865e924c","status":"affected","lessThan":"79dd3f1d9dd310c2af89b09c71f34d93973b200f","versionType":"git"},{"version":"9d71dd0c70099914fcd063135da3c580865e924c","status":"affected","lessThan":"5d5602236f5db19e8b337a2cd87a90ace5ea776d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/j1939/transport.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.4","versionType":"semver"},{"version":"5.10.248","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.198","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.161","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.121","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.66","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.6","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/j1939/transport.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:56:15.065Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.10.248"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.15.198"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.1.161"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.6.121"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.12.66"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.18.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2025-71182","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-06-10T20:42:04.625425Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-362","lang":"en","type":"CWE","description":"CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T18:15:16.548Z"}}]}}}