CVE-2026-43470

{"id": "CVE-2026-43470", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "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": "7c6c5249f061b64fc6b5b90bc147169a048691bf", "lessThan": "7e2963773760a664684435201960dd2fb712f1b5", "versionType": "git"}, {"status": "affected", "version": "7c6c5249f061b64fc6b5b90bc147169a048691bf", "lessThan": "203c792cb4315360d49973ae2e57feeb6d3dcf7e", "versionType": "git"}, {"status": "affected", "version": "7c6c5249f061b64fc6b5b90bc147169a048691bf", "lessThan": "9ee1770fcb2f1b48354622b926e7dc10222805f5", "versionType": "git"}, {"status": "affected", "version": "7c6c5249f061b64fc6b5b90bc147169a048691bf", "lessThan": "410666a298c34ebd57256fde6b24c96bd23059a2", "versionType": "git"}], "programFiles": ["fs/nfs/nfs3proc.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.10"}, {"status": "unaffected", "version": "0", "lessThan": "6.10", "versionType": "semver"}, {"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": ["fs/nfs/nfs3proc.c"], "defaultStatus": "affected"}]}], "published": "2026-05-08T15:17:00.090", "references": [{"url": "https://git.kernel.org/stable/c/203c792cb4315360d49973ae2e57feeb6d3dcf7e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/410666a298c34ebd57256fde6b24c96bd23059a2", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7e2963773760a664684435201960dd2fb712f1b5", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9ee1770fcb2f1b48354622b926e7dc10222805f5", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfs: return EISDIR on nfs3_proc_create if d_alias is a dir\n\nIf we found an alias through nfs3_do_create/nfs_add_or_obtain\n/d_splice_alias which happens to be a dir dentry, we don't return\nany error, and simply forget about this alias, but the original\ndentry we were adding and passed as parameter remains negative.\n\nThis later causes an oops on nfs_atomic_open_v23/finish_open since we\nsupply a negative dentry to do_dentry_open.\n\nThis has been observed running lustre-racer, where dirs and files are\ncreated/removed concurrently with the same name and O_EXCL is not\nused to open files (frequent file redirection).\n\nWhile d_splice_alias typically returns a directory alias or NULL, we\nexplicitly check d_is_dir() to ensure that we don't attempt to perform\nfile operations (like finish_open) on a directory inode, which triggers\nthe observed oops."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnfs: devolver EISDIR en nfs3_proc_create si d_alias es un directorio\n\nSi encontramos un alias a trav\u00e9s de nfs3_do_create/nfs_add_or_obtain /d_splice_alias que resulta ser una entrada de directorio, no devolvemos ning\u00fan error y simplemente nos olvidamos de este alias, pero la entrada original que est\u00e1bamos a\u00f1adiendo y que se pas\u00f3 como par\u00e1metro permanece negativa.\n\nEsto m\u00e1s tarde causa un oops en nfs_atomic_open_v23/finish_open ya que suministramos una entrada negativa a do_dentry_open.\n\nEsto se ha observado ejecutando lustre-racer, donde los directorios y archivos se crean/eliminan concurrentemente con el mismo nombre y O_EXCL no se utiliza para abrir archivos (redirecci\u00f3n frecuente de archivos).\n\nSi bien d_splice_alias t\u00edpicamente devuelve un alias de directorio o NULL, verificamos expl\u00edcitamente d_is_dir() para asegurar que no intentamos realizar operaciones de archivo (como finish_open) en un inodo de directorio, lo que desencadena el oops observado."}], "lastModified": "2026-11-11T20:10:00.273", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DA007D53-8D99-404A-8E76-341B5D45F5B3", "versionEndExcluding": "6.12.78", "versionStartIncluding": "6.10"}, {"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: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"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}