CVE-2026-46281

{"id": "CVE-2026-46281", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "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": "4c5d3365882dbbc0784688784904f440d7a4c0f1", "lessThan": "e9b057a44deff4c59c13f44672a5cc74dcd57522", "versionType": "git"}, {"status": "affected", "version": "4c5d3365882dbbc0784688784904f440d7a4c0f1", "lessThan": "b281adf71f786c325eb6d6d1582d4d05313438a8", "versionType": "git"}, {"status": "affected", "version": "4c5d3365882dbbc0784688784904f440d7a4c0f1", "lessThan": "82d1f01292d3f09bf063f829f8ab8de12b4280a1", "versionType": "git"}], "programFiles": ["mm/vmalloc.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.18"}, {"status": "unaffected", "version": "0", "lessThan": "6.18", "versionType": "semver"}, {"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": ["mm/vmalloc.c"], "defaultStatus": "affected"}]}], "published": "2026-06-08T17:16:45.817", "references": [{"url": "https://git.kernel.org/stable/c/82d1f01292d3f09bf063f829f8ab8de12b4280a1", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b281adf71f786c325eb6d6d1582d4d05313438a8", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e9b057a44deff4c59c13f44672a5cc74dcd57522", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvmalloc: fix buffer overflow in vrealloc_node_align()\n\nCommit 4c5d3365882d (\"mm/vmalloc: allow to set node and align in\nvrealloc\") added the ability to force a new allocation if the current\npointer is on the wrong NUMA node, or if an alignment constraint is not\nmet, even if the user is shrinking the allocation.\n\nOn this path (need_realloc), the code allocates a new object of 'size'\nbytes and then memcpy()s 'old_size' bytes into it. If the request is to\nshrink the object (size < old_size), this results in an out-of-bounds\nwrite on the new buffer.\n\nFix this by bounding the copy length by the new allocation size."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nvmalloc: corregir desbordamiento de b\u00fafer en vrealloc_node_align()\n\nEl commit 4c5d3365882d ('mm/vmalloc: permitir establecer nodo y alineaci\u00f3n en vrealloc') a\u00f1adi\u00f3 la capacidad de forzar una nueva asignaci\u00f3n si el puntero actual est\u00e1 en el nodo NUMA incorrecto, o si no se cumple una restricci\u00f3n de alineaci\u00f3n, incluso si el usuario est\u00e1 reduciendo la asignaci\u00f3n.\n\nEn esta ruta (need_realloc), el c\u00f3digo asigna un nuevo objeto de 'size' bytes y luego copia 'old_size' bytes en \u00e9l usando memcpy(). Si la solicitud es reducir el objeto (size < old_size), esto resulta en una escritura fuera de l\u00edmites en el nuevo b\u00fafer.\n\nSolucionar esto limitando la longitud de la copia por el nuevo tama\u00f1o de asignaci\u00f3n."}], "lastModified": "2026-07-23T08:10:00.137", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1A10DA86-4154-4102-9D63-807CF10A4352", "versionEndExcluding": "6.18.27", "versionStartIncluding": "6.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CDB78D6D-22C3-4154-B0D0-94AF1CE5C2E3", "versionEndExcluding": "7.0.4", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}