CVE-2026-43427

{"id": "CVE-2026-43427", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43427", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T15:38:09.164948Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "afba937e540c902c989cd516fd97ea0c8499bb27", "lessThan": "638328ca9c17ae6511ad62198c57bae32ffa3c91", "versionType": "git"}, {"status": "affected", "version": "afba937e540c902c989cd516fd97ea0c8499bb27", "lessThan": "170e8daca24da6edb4be82ab01abf44e87af387b", "versionType": "git"}, {"status": "affected", "version": "afba937e540c902c989cd516fd97ea0c8499bb27", "lessThan": "c8fa96ed021923dae147bcd9f9205b8df7b82360", "versionType": "git"}, {"status": "affected", "version": "afba937e540c902c989cd516fd97ea0c8499bb27", "lessThan": "4ee3062bf2c9a722afef429826e8607eaf3fc6a0", "versionType": "git"}, {"status": "affected", "version": "afba937e540c902c989cd516fd97ea0c8499bb27", "lessThan": "276aef0fd2b92f41b920ac891c72cadeee957934", "versionType": "git"}, {"status": "affected", "version": "afba937e540c902c989cd516fd97ea0c8499bb27", "lessThan": "67ed312124bb1b61858778ac0b985b48961c862a", "versionType": "git"}, {"status": "affected", "version": "afba937e540c902c989cd516fd97ea0c8499bb27", "lessThan": "e3c874b05901dc519054b5107d16620e6d2b5fea", "versionType": "git"}, {"status": "affected", "version": "afba937e540c902c989cd516fd97ea0c8499bb27", "lessThan": "8df672bfe3ec2268c2636584202755898e547173", "versionType": "git"}], "programFiles": ["drivers/usb/class/cdc-wdm.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.26"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.26", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.253", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.203", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.167", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.130", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.78", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.19", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.9", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/usb/class/cdc-wdm.c"], "defaultStatus": "affected"}]}], "published": "2026-05-08T15:16:54.867", "references": [{"url": "https://git.kernel.org/stable/c/170e8daca24da6edb4be82ab01abf44e87af387b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/276aef0fd2b92f41b920ac891c72cadeee957934", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4ee3062bf2c9a722afef429826e8607eaf3fc6a0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/638328ca9c17ae6511ad62198c57bae32ffa3c91", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/67ed312124bb1b61858778ac0b985b48961c862a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8df672bfe3ec2268c2636584202755898e547173", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c8fa96ed021923dae147bcd9f9205b8df7b82360", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e3c874b05901dc519054b5107d16620e6d2b5fea", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: class: cdc-wdm: fix reordering issue in read code path\n\nQuoting the bug report:\n\nDue to compiler optimization or CPU out-of-order execution, the\ndesc->length update can be reordered before the memmove. If this\nhappens, wdm_read() can see the new length and call copy_to_user() on\nuninitialized memory. This also violates LKMM data race rules [1].\n\nFix it by using WRITE_ONCE and memory barriers."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:\n\nusb: class: cdc-wdm: corregir problema de reordenamiento en la ruta de c\u00f3digo de lectura\n\nCitando el informe de error:\n\nDebido a la optimizaci\u00f3n del compilador o a la ejecuci\u00f3n fuera de orden de la CPU, la actualizaci\u00f3n de desc -> length puede reordenarse antes del memmove. Si esto ocurre, wdm_read() puede ver la nueva longitud y llamar a copy_to_user() en memoria no inicializada. Esto tambi\u00e9n viola las reglas de carrera de datos de LKMM [1].\n\nSolucionarlo usando WRITE_ONCE y barreras de memoria."}], "lastModified": "2026-11-11T20:10:00.273", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5F7C4E68-B5A8-416F-9E9E-9E29289DF9DC", "versionEndExcluding": "5.10.253", "versionStartIncluding": "2.6.26.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "20DDB3E9-AABF-4107-ADB0-5362AA067045", "versionEndExcluding": "5.15.203", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2EDC6BAF-B710-4E26-B6AA-D68922EE7B43", "versionEndExcluding": "6.1.167", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C57BB918-DF28-46B3-94F7-144176841267", "versionEndExcluding": "6.6.130", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "28D591F5-B196-4CC9-905C-DC80F116E7A8", "versionEndExcluding": "6.12.78", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D394AC60-6F28-435F-872A-CCDF384B8331", "versionEndExcluding": "6.18.19", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E825E7C3-FEAC-4FD3-8A81-78D7387948C9", "versionEndExcluding": "6.19.9", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.26:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2904D4F1-8EE3-49BD-8EA8-5C7FA05E28F3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.26:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "12D0C03A-7D30-485F-8431-638918FE9658"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.26:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8B8E0DDC-7566-4EF9-9A8F-B1870CA83144"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.26:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "764777FB-FD1E-4930-899C-AC5D2DF293E8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.26:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "95461D7E-A080-4B9E-BC72-6BDBC1C1A447"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.26:rc8:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D913E879-38EC-46AE-9F20-5D3E5F2CDCC2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.26:rc9:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B264E869-1A6C-4D85-9944-2E4EB523CD82"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}