{"id":"CVE-2025-38665","state":"PUBLISHED","title":"can: netlink: can_changelink(): fix NULL pointer deref of struct can_priv::do_set_mode","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: netlink: can_changelink(): fix NULL pointer deref of struct can_priv::do_set_mode\n\nAndrei Lalaev reported a NULL pointer deref when a CAN device is\nrestarted from Bus Off and the driver does not implement the struct\ncan_priv::do_set_mode callback.\n\nThere are 2 code path that call struct can_priv::do_set_mode:\n- directly by a manual restart from the user space, via\n  can_changelink()\n- delayed automatic restart after bus off (deactivated by default)\n\nTo prevent the NULL pointer deference, refuse a manual restart or\nconfigure the automatic restart delay in can_changelink() and report\nthe error via extack to user space.\n\nAs an additional safety measure let can_restart() return an error if\ncan_priv::do_set_mode is not set instead of dereferencing it\nunchecked.","publishedAt":"2025-08-22T16:02:57.458Z","updatedAt":"2026-05-11T21:32:36.485Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"39549eef3587f1c1e8c65c88a2400d10fd30ea17","status":"affected","lessThan":"6bbcf37c5114926c99a1d1e6993a5b35689d2599","versionType":"git"},{"version":"39549eef3587f1c1e8c65c88a2400d10fd30ea17","status":"affected","lessThan":"cf81a60a973358dea163f6b14062f17831ceb894","versionType":"git"},{"version":"39549eef3587f1c1e8c65c88a2400d10fd30ea17","status":"affected","lessThan":"0ca816a96fdcf32644c80cbe7a82c7b6ce6ddda5","versionType":"git"},{"version":"39549eef3587f1c1e8c65c88a2400d10fd30ea17","status":"affected","lessThan":"6acceb46180f9e160d4f0c56fcaf39ba562822ae","versionType":"git"},{"version":"39549eef3587f1c1e8c65c88a2400d10fd30ea17","status":"affected","lessThan":"c1f3f9797c1f44a762e6f5f72520b2e520537b52","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/dev/dev.c","drivers/net/can/dev/netlink.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.31","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.31","versionType":"semver"},{"version":"6.1.148","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.101","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.41","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.15.9","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/dev/dev.c","drivers/net/can/dev/netlink.c"]}],"references":["https://git.kernel.org/stable/c/6bbcf37c5114926c99a1d1e6993a5b35689d2599","https://git.kernel.org/stable/c/cf81a60a973358dea163f6b14062f17831ceb894","https://git.kernel.org/stable/c/0ca816a96fdcf32644c80cbe7a82c7b6ce6ddda5","https://git.kernel.org/stable/c/6acceb46180f9e160d4f0c56fcaf39ba562822ae","https://git.kernel.org/stable/c/c1f3f9797c1f44a762e6f5f72520b2e520537b52","https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/38xxx/CVE-2025-38665.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38665","state":"PUBLISHED","datePublished":"2025-08-22T16:02:57.458Z","dateUpdated":"2026-05-11T21:32:36.485Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T04:51:24.031Z"},"containers":{"cna":{"title":"can: netlink: can_changelink(): fix NULL pointer deref of struct can_priv::do_set_mode","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: netlink: can_changelink(): fix NULL pointer deref of struct can_priv::do_set_mode\n\nAndrei Lalaev reported a NULL pointer deref when a CAN device is\nrestarted from Bus Off and the driver does not implement the struct\ncan_priv::do_set_mode callback.\n\nThere are 2 code path that call struct can_priv::do_set_mode:\n- directly by a manual restart from the user space, via\n  can_changelink()\n- delayed automatic restart after bus off (deactivated by default)\n\nTo prevent the NULL pointer deference, refuse a manual restart or\nconfigure the automatic restart delay in can_changelink() and report\nthe error via extack to user space.\n\nAs an additional safety measure let can_restart() return an error if\ncan_priv::do_set_mode is not set instead of dereferencing it\nunchecked."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"39549eef3587f1c1e8c65c88a2400d10fd30ea17","status":"affected","lessThan":"6bbcf37c5114926c99a1d1e6993a5b35689d2599","versionType":"git"},{"version":"39549eef3587f1c1e8c65c88a2400d10fd30ea17","status":"affected","lessThan":"cf81a60a973358dea163f6b14062f17831ceb894","versionType":"git"},{"version":"39549eef3587f1c1e8c65c88a2400d10fd30ea17","status":"affected","lessThan":"0ca816a96fdcf32644c80cbe7a82c7b6ce6ddda5","versionType":"git"},{"version":"39549eef3587f1c1e8c65c88a2400d10fd30ea17","status":"affected","lessThan":"6acceb46180f9e160d4f0c56fcaf39ba562822ae","versionType":"git"},{"version":"39549eef3587f1c1e8c65c88a2400d10fd30ea17","status":"affected","lessThan":"c1f3f9797c1f44a762e6f5f72520b2e520537b52","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/dev/dev.c","drivers/net/can/dev/netlink.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.31","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.31","versionType":"semver"},{"version":"6.1.148","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.101","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.41","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.15.9","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/dev/dev.c","drivers/net/can/dev/netlink.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/6bbcf37c5114926c99a1d1e6993a5b35689d2599"},{"url":"https://git.kernel.org/stable/c/cf81a60a973358dea163f6b14062f17831ceb894"},{"url":"https://git.kernel.org/stable/c/0ca816a96fdcf32644c80cbe7a82c7b6ce6ddda5"},{"url":"https://git.kernel.org/stable/c/6acceb46180f9e160d4f0c56fcaf39ba562822ae"},{"url":"https://git.kernel.org/stable/c/c1f3f9797c1f44a762e6f5f72520b2e520537b52"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:32:36.485Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.1.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.6.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.12.41"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.15.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.16"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T17:40:51.309Z"}}]}}}