{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38460","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T04:51:24.019Z","datePublished":"2025-07-25T15:27:38.608Z","dateUpdated":"2026-08-05T12:02:03.635Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T12:02:03.635Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\natm: clip: Fix potential null-ptr-deref in to_atmarpd().\n\natmarpd is protected by RTNL since commit f3a0592b37b8 (\"[ATM]: clip\ncauses unregister hang\").\n\nHowever, it is not enough because to_atmarpd() is called without RTNL,\nespecially clip_neigh_solicit() / neigh_ops->solicit() is unsleepable.\n\nAlso, there is no RTNL dependency around atmarpd.\n\nLet's use a private mutex and RCU to protect access to atmarpd in\nto_atmarpd()."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The race is driven from local context — an ATM socket's ATMARPD_CTRL open/close on one side and local packet transmission over the atm%d CLIP device (clip_start_xmit/clip_neigh_solicit) on the other. Received network packets can only supply one half of the race and give a remote party no influence over the teardown side, so Local is the accurate vector.\nAC:H - Scoring the security-meaningful attacker (unprivileged local user), the exploit requires being inside to_atmarpd() exactly while atmarpd_close() NULLs and frees the daemon's vcc — the daemon teardown is a system condition that an unprivileged attacker cannot induce, even though they can hammer the trigger path continuously.\nPR:L - No privileges are needed to reach the vulnerable function: any local user sending IP traffic to unresolved addresses on a configured CLIP interface drives clip_start_xmit()/clip_neigh_solicit() → to_atmarpd(). Only the administrative setup (SIOCMKCLIP/ATMARPD_CTRL, capable(CAP_NET_ADMIN)) is privileged, and that is the pre-existing deployment, not the attack.\nUI:N - No victim action is required — the attacker's own traffic triggers the vulnerable path, and the daemon-teardown condition is accounted for in Attack Complexity rather than user interaction.\nS:U - Both the flaw and its impact are confined to the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Winning the race leaves the racing thread operating on a freed struct atm_vcc/sock allocated from the generic kmalloc caches, and a use-after-free of a sprayable sock object can be leveraged to read kernel memory.\nI:H - The stale pointer is used for an atomic_add() write, an skb_queue_tail() list insertion into freed memory, and an indirect call through the freed sock's sk_data_ready() — a write primitive plus control-flow hijack after heap grooming.\nA:H - The minimum outcome is a kernel oops — a NULL (or freed) sock dereference in atm_force_charge()/skb_queue_tail() and a call through a NULL/garbage sk_data_ready pointer — panicking the system."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/atm/clip.c"],"versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"a4c5785feb979cd996a99cfaad8bf353b2e79301","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"70eac9ba7ce25d99c1d99bbf4ddb058940f631f9","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"3251ce3979f41bd228f77a7615f9dd616d06a110","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"ee4d9e4ddf3f9c4ee2ec0a3aad6196ee36d30e57","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"06935c50cfa3ac57cce80bba67b6d38ec1406e92","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"36caab990b69ef4eec1d81c52a19f080b7daa059","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"f58e4270c73e7f086322978d585ea67c8076ce49","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"706cc36477139c1616a9b2b96610a8bb520b7119","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/atm/clip.c"],"versions":[{"version":"2.6.12","status":"affected"},{"version":"0","lessThan":"2.6.12","status":"unaffected","versionType":"semver"},{"version":"5.4.296","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.240","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.189","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.146","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.99","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.39","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.15.7","lessThanOrEqual":"6.15.*","status":"unaffected","versionType":"semver"},{"version":"6.16","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":"2.6.12","versionEndExcluding":"5.4.296"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.10.240"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.15.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.1.146"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.6.99"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.12.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.15.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.16"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/a4c5785feb979cd996a99cfaad8bf353b2e79301"},{"url":"https://git.kernel.org/stable/c/70eac9ba7ce25d99c1d99bbf4ddb058940f631f9"},{"url":"https://git.kernel.org/stable/c/3251ce3979f41bd228f77a7615f9dd616d06a110"},{"url":"https://git.kernel.org/stable/c/ee4d9e4ddf3f9c4ee2ec0a3aad6196ee36d30e57"},{"url":"https://git.kernel.org/stable/c/06935c50cfa3ac57cce80bba67b6d38ec1406e92"},{"url":"https://git.kernel.org/stable/c/36caab990b69ef4eec1d81c52a19f080b7daa059"},{"url":"https://git.kernel.org/stable/c/f58e4270c73e7f086322978d585ea67c8076ce49"},{"url":"https://git.kernel.org/stable/c/706cc36477139c1616a9b2b96610a8bb520b7119"}],"title":"atm: clip: Fix potential null-ptr-deref in to_atmarpd().","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"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T17:38:19.880Z"}}]}}