CVE-2025-38180

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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 \u2014 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": 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El manejo de /proc/net/atm/lec debe garantizar la seguridad contra cambios en dev_lec[]. Al parecer, se invocaban llamadas a dev_put() sin dev_hold() previo, lo que provocaba desequilibrio y UAF."}], "id": "CVE-2025-38180", "lastModified": "2026-07-30T06:22:58.053", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-38180", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-10T20:41:57.337618Z", "version": "2.0.3"}}]}, "published": "2025-07-04T14:15:24.700", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5fe1b23a2f87f43aeeac51e08819cbc6fd808cbc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9b9aeb3ada44d8abea1e31e4446113f460848ae4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a5e3a144268899f1a8c445c8a3bfa15873ba85e8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ca3829c18c8d0ceb656605d3bff6bb3dfb078589"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d03b79f459c7935cff830d98373474f440bd03ae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e612c4b014f5808fbc6beae21f5ccaca5e76a2f8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f2d1443b18806640abdb530e88009af7be2588e7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fcfccf56f4eba7d00aa2d33c7bb1b33083237742"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net: atm: fix /proc/net/atm/lec handling", "id": "2376376", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2376376"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: atm: fix /proc/net/atm/lec handling\n/proc/net/atm/lec must ensure safety against dev_lec[] changes.\nIt appears it had dev_put() calls without prior dev_hold(),\nleading to imbalance and UAF."], "name": "CVE-2025-38180", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-07-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38180\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38180\nhttps://lore.kernel.org/linux-cve-announce/2025070410-CVE-2025-38180-c6d0@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-13T21:47:48.202296+00:00", "updated": "2025-07-13T21:47:48.202383+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}