CVE-2026-46280

{"id": "CVE-2026-46280", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "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": "b2ef9f5a5cb37643ca5def3516c546457074b882", "lessThan": "234071b4318feaeb27cd2e4e1b16ef6b055adf89", "versionType": "git"}, {"status": "affected", "version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "lessThan": "bf477abd448c76bb8ea51c9b4f63a3a17c4b6239", "versionType": "git"}, {"status": "affected", "version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "lessThan": "5846715b6382dd4c6a69b35a56ca6115d33bc2a0", "versionType": "git"}, {"status": "affected", "version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "lessThan": "38f113f81d3f0adc658a4475dd3ecaec985e21d3", "versionType": "git"}, {"status": "affected", "version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "lessThan": "9de1eb0aac2862d6144b8db0ec1388e79f8bc3e1", "versionType": "git"}, {"status": "affected", "version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "lessThan": "744dd97752ef1076a8d8672bb0d8aa2c7abc1144", "versionType": "git"}], "programFiles": ["lib/test_hmm.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.8"}, {"status": "unaffected", "version": "0", "lessThan": "5.8", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.176", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.140", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.86", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.27", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.4", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["lib/test_hmm.c"], "defaultStatus": "affected"}]}], "published": "2026-06-08T17:16:45.683", "references": [{"url": "https://git.kernel.org/stable/c/234071b4318feaeb27cd2e4e1b16ef6b055adf89", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/38f113f81d3f0adc658a4475dd3ecaec985e21d3", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/5846715b6382dd4c6a69b35a56ca6115d33bc2a0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/744dd97752ef1076a8d8672bb0d8aa2c7abc1144", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9de1eb0aac2862d6144b8db0ec1388e79f8bc3e1", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/bf477abd448c76bb8ea51c9b4f63a3a17c4b6239", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlib: test_hmm: evict device pages on file close to avoid use-after-free\n\nPatch series \"Minor hmm_test fixes and cleanups\".\n\nTwo bugfixes a cleanup for the HMM kernel selftests. These were mostly\nreported by Zenghui Yu with special thanks to Lorenzo for analysing and\npointing out the problems.\n\n\nThis patch (of 3):\n\nWhen dmirror_fops_release() is called it frees the dmirror struct but\ndoesn't migrate device private pages back to system memory first. This\nleaves those pages with a dangling zone_device_data pointer to the freed\ndmirror.\n\nIf a subsequent fault occurs on those pages (eg. during coredump) the\ndmirror_devmem_fault() callback dereferences the stale pointer causing a\nkernel panic. This was reported [1] when running mm/ksft_hmm.sh on arm64,\nwhere a test failure triggered SIGABRT and the resulting coredump walked\nthe VMAs faulting in the stale device private pages.\n\nFix this by calling dmirror_device_evict_chunk() for each devmem chunk in\ndmirror_fops_release() to migrate all device private pages back to system\nmemory before freeing the dmirror struct. The function is moved earlier\nin the file to avoid a forward declaration."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nlib: test_hmm: expulsar p\u00e1ginas de dispositivo al cerrar el archivo para evitar el uso despu\u00e9s de liberaci\u00f3n\n\nSerie de parches 'Correcciones y limpiezas menores de hmm_test'.\n\nDos correcciones de errores y una limpieza para las autopruebas del kernel HMM. Estos fueron reportados principalmente por Zenghui Yu con un agradecimiento especial a Lorenzo por analizar y se\u00f1alar los problemas.\n\nEste parche (de 3):\n\nCuando se llama a dmirror_fops_release(), libera la estructura dmirror pero no migra primero las p\u00e1ginas privadas del dispositivo de vuelta a la memoria del sistema. Esto deja esas p\u00e1ginas con un puntero zone_device_data colgante a la dmirror liberada.\n\nSi ocurre una falla posterior en esas p\u00e1ginas (por ejemplo, durante un coredump), la devoluci\u00f3n de llamada dmirror_devmem_fault() desreferencia el puntero obsoleto causando un p\u00e1nico del kernel. Esto fue reportado [1] al ejecutar mm/ksft_hmm.sh en arm64, donde una falla de prueba activ\u00f3 SIGABRT y el coredump resultante recorri\u00f3 las VMA causando fallas en las p\u00e1ginas privadas de dispositivo obsoletas.\n\nSolucione esto llamando a dmirror_device_evict_chunk() para cada fragmento de devmem en dmirror_fops_release() para migrar todas las p\u00e1ginas privadas del dispositivo de vuelta a la memoria del sistema antes de liberar la estructura dmirror. La funci\u00f3n se mueve antes en el archivo para evitar una declaraci\u00f3n anticipada."}], "lastModified": "2026-07-23T08:10:00.137", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3119E417-9FF5-4E06-9321-6696E979BECA", "versionEndExcluding": "6.1.176", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A1A92866-F406-43B5-B2D1-CFC274753E9D", "versionEndExcluding": "6.6.140", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "55DA1C62-9991-451E-B8A8-E0004E00F789", "versionEndExcluding": "6.12.86", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A10AC84F-C058-47D5-85B4-E6E51A613B74", "versionEndExcluding": "6.18.27", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CDB78D6D-22C3-4154-B0D0-94AF1CE5C2E3", "versionEndExcluding": "7.0.4", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}