{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-38180", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.992Z", "datePublished": "2025-07-04T13:37:08.258Z", "dateUpdated": "2026-08-05T12:00:10.648Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:00:10.648Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: atm: fix /proc/net/atm/lec handling\n\n/proc/net/atm/lec must ensure safety against dev_lec[] changes.\n\nIt appears it had dev_put() calls without prior dev_hold(),\nleading to imbalance and UAF." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerability is triggered by reading the local procfs file /proc/net/atm/lec; no network protocol data reaches the defective code. Exploitation requires a local account or any local code execution context on the host network namespace.\nAC:L - The unbalanced dev_put() fires deterministically on every read() of the file — no race must be won, and the attacker controls how many times to repeat it to drive the net_device refcount arbitrarily negative. The secondary dev_lec[] race is also attacker-paced via a tight read loop.\nPR:L - /proc/net/atm/lec is created with mode 0444, so any unprivileged local user can read it with no capability check on the path; the lec module itself is autoloadable by an unprivileged user via request_module(\"lec\") in do_vcc_ioctl() before any capable() test. CAP_NET_ADMIN is only needed to configure the LANE interface, which is a property of the target deployment rather than of the attacker.\nUI:N - The attacker triggers the defect entirely on their own by reading the procfs file; no victim action or cooperation of any kind is needed.\nS:U - The corrupted net_device object and the resulting memory corruption stay within the kernel's own security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The refcount underflow lets a live net_device be freed while still referenced, and the missing lec_mutex allows the seq_show path to dereference a freed device; a UAF on a large kmalloc'd object gives the attacker control over the reclaimed contents and a kernel-memory read primitive.\nI:H - Premature free of an in-use net_device is a use-after-free on a structure dense with function pointers and list heads, sprayable for arbitrary write and control-flow hijack leading to privilege escalation.\nA:H - Driving the reference count below one reaches BUG_ON(netdev_refcnt_read(dev) != 1) in netdev_run_todo(), and use of the freed device oopses the kernel; either outcome is a full system crash reachable by an unprivileged loop." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/atm/lec.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "fcfccf56f4eba7d00aa2d33c7bb1b33083237742", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "f2d1443b18806640abdb530e88009af7be2588e7", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ca3829c18c8d0ceb656605d3bff6bb3dfb078589", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "e612c4b014f5808fbc6beae21f5ccaca5e76a2f8", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a5e3a144268899f1a8c445c8a3bfa15873ba85e8", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "5fe1b23a2f87f43aeeac51e08819cbc6fd808cbc", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9b9aeb3ada44d8abea1e31e4446113f460848ae4", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d03b79f459c7935cff830d98373474f440bd03ae", "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/lec.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.295", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.239", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.186", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.142", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.95", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.35", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15.4", "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": "5.4.295" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.10.239" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.186" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.142" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.95" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.35" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.15.4" }, { "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/fcfccf56f4eba7d00aa2d33c7bb1b33083237742" }, { "url": "https://git.kernel.org/stable/c/f2d1443b18806640abdb530e88009af7be2588e7" }, { "url": "https://git.kernel.org/stable/c/ca3829c18c8d0ceb656605d3bff6bb3dfb078589" }, { "url": "https://git.kernel.org/stable/c/e612c4b014f5808fbc6beae21f5ccaca5e76a2f8" }, { "url": "https://git.kernel.org/stable/c/a5e3a144268899f1a8c445c8a3bfa15873ba85e8" }, { "url": "https://git.kernel.org/stable/c/5fe1b23a2f87f43aeeac51e08819cbc6fd808cbc" }, { "url": "https://git.kernel.org/stable/c/9b9aeb3ada44d8abea1e31e4446113f460848ae4" }, { "url": "https://git.kernel.org/stable/c/d03b79f459c7935cff830d98373474f440bd03ae" } ], "title": "net: atm: fix /proc/net/atm/lec handling", "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": "2025-11-03T17:35:04.821Z" } }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2025-38180", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-06-10T20:41:57.337618Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-11T18:44:17.953Z" } } ] } }