{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47459","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-22T06:20:56.197Z","datePublished":"2024-05-22T06:23:21.061Z","dateUpdated":"2025-05-04T07:11:22.671Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:11:22.671Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv\n\nIt will trigger UAF for rx_kref of j1939_priv as following.\n\n        cpu0                                    cpu1\nj1939_sk_bind(socket0, ndev0, ...)\nj1939_netdev_start\n                                        j1939_sk_bind(socket1, ndev0, ...)\n                                        j1939_netdev_start\nj1939_priv_set\n                                        j1939_priv_get_by_ndev_locked\nj1939_jsk_add\n.....\nj1939_netdev_stop\nkref_put_lock(&priv->rx_kref, ...)\n                                        kref_get(&priv->rx_kref, ...)\n                                        REFCOUNT_WARN(\"addition on 0;...\")\n\n====================================================\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 1 PID: 20874 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0\nRIP: 0010:refcount_warn_saturate+0x169/0x1e0\nCall Trace:\n j1939_netdev_start+0x68b/0x920\n j1939_sk_bind+0x426/0xeb0\n ? security_socket_bind+0x83/0xb0\n\nThe rx_kref's kref_get() and kref_put() should use j1939_netdev_lock to\nprotect."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/j1939/main.c"],"versions":[{"version":"9d71dd0c70099914fcd063135da3c580865e924c","lessThan":"a0e47d2833b4f65e6c799f28c6b636d36b8b936d","status":"affected","versionType":"git"},{"version":"9d71dd0c70099914fcd063135da3c580865e924c","lessThan":"864e77771a24c877aaf53aee019f78619cbcd668","status":"affected","versionType":"git"},{"version":"9d71dd0c70099914fcd063135da3c580865e924c","lessThan":"6e8811707e2df0c6ba920f0cad3a3bca7b42132f","status":"affected","versionType":"git"},{"version":"9d71dd0c70099914fcd063135da3c580865e924c","lessThan":"d9d52a3ebd284882f5562c88e55991add5d01586","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/j1939/main.c"],"versions":[{"version":"5.4","status":"affected"},{"version":"0","lessThan":"5.4","status":"unaffected","versionType":"semver"},{"version":"5.4.156","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.76","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.14.15","lessThanOrEqual":"5.14.*","status":"unaffected","versionType":"semver"},{"version":"5.15","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":"5.4","versionEndExcluding":"5.4.156"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.10.76"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.14.15"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.15"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/a0e47d2833b4f65e6c799f28c6b636d36b8b936d"},{"url":"https://git.kernel.org/stable/c/864e77771a24c877aaf53aee019f78619cbcd668"},{"url":"https://git.kernel.org/stable/c/6e8811707e2df0c6ba920f0cad3a3bca7b42132f"},{"url":"https://git.kernel.org/stable/c/d9d52a3ebd284882f5562c88e55991add5d01586"}],"title":"can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:39:59.451Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/a0e47d2833b4f65e6c799f28c6b636d36b8b936d","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/864e77771a24c877aaf53aee019f78619cbcd668","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/6e8811707e2df0c6ba920f0cad3a3bca7b42132f","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/d9d52a3ebd284882f5562c88e55991add5d01586","tags":["x_transferred"]}]},{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47459","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T15:36:14.848678Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-09-11T17:33:25.941Z"}}]}}