CVE-2026-89779

{"id": "CVE-2026-89779", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 3.9}]}, "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": "333feb7ba84f69f9b423422417aaac54fd9e7c84", "lessThan": "b27e68ad818a4ca2cef8f35f97e75d756714c818", "versionType": "git"}, {"status": "affected", "version": "000a9a72efa4a9df289bab9c9e8ba1639c72e0d6", "lessThan": "28a924c7e67e6d71abeb04860b61166fecb027fc", "versionType": "git"}, {"status": "affected", "version": "0e8235d28f3a0e9eda9f02ff67ee566d5f42b66b", "lessThan": "d585ed08308909c7e6fefb4e8a258aeb29b19ff9", "versionType": "git"}, {"status": "affected", "version": "0e8235d28f3a0e9eda9f02ff67ee566d5f42b66b", "lessThan": "077df8464cf24f8ffc82fb6efec2ae600686e699", "versionType": "git"}, {"status": "affected", "version": "0e8235d28f3a0e9eda9f02ff67ee566d5f42b66b", "lessThan": "aab1880058ac767d3ea9388a9a7221c776c22c44", "versionType": "git"}, {"status": "affected", "version": "0e8235d28f3a0e9eda9f02ff67ee566d5f42b66b", "lessThan": "c8a109c9e23a2c7fd548473dde728b2cb8188146", "versionType": "git"}, {"status": "affected", "version": "0e8235d28f3a0e9eda9f02ff67ee566d5f42b66b", "lessThan": "c22f91d82cb9a29d22bdffdce6c803467984ad0c", "versionType": "git"}, {"status": "affected", "version": "5.15.121", "lessThan": "5.15.221", "versionType": "semver"}, {"status": "affected", "version": "6.1.40", "lessThan": "6.1.188", "versionType": "semver"}], "programFiles": ["fs/ntfs3/xattr.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.2"}, {"status": "unaffected", "version": "0", "lessThan": "6.2", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.221", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.188", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.157", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.110", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.52", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.2.6", "versionType": "semver", "lessThanOrEqual": "7.2.*"}, {"status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/ntfs3/xattr.c"], "defaultStatus": "affected"}]}], "published": "2026-09-16T09:17:08.387", "references": [{"url": "https://git.kernel.org/stable/c/077df8464cf24f8ffc82fb6efec2ae600686e699", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/28a924c7e67e6d71abeb04860b61166fecb027fc", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/aab1880058ac767d3ea9388a9a7221c776c22c44", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b27e68ad818a4ca2cef8f35f97e75d756714c818", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c22f91d82cb9a29d22bdffdce6c803467984ad0c", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c8a109c9e23a2c7fd548473dde728b2cb8188146", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d585ed08308909c7e6fefb4e8a258aeb29b19ff9", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: validate ef->size covers the record's name and value\n\nWhen an EA record has a non-zero ef->size, ntfs_read_ea() only checks\nthat the record fits in the remaining buffer (ea_size > bytes), not that\nef->size is large enough to hold the record's own name_len + 1 + elength.\n\nA crafted image can pass validation with, e.g., ef->size = 24 but\nelength = 0xffff. ntfs_get_ea() then trusts elength and copies it out of\nthe undersized record, reading past the kmalloc(info->size) allocation\nand leaking heap memory to userspace via getxattr():\n\n BUG: KASAN: slab-out-of-bounds in ntfs_get_ea (fs/ntfs3/xattr.c:302)\n Read of size 65535 at addr ffff888100794550 by task exploit\n __asan_memcpy (mm/kasan/shadow.c:105)\n ntfs_get_ea (fs/ntfs3/xattr.c:302)\n ntfs_getxattr (fs/ntfs3/xattr.c:848)\n __vfs_getxattr (fs/xattr.c:441)\n vfs_getxattr (fs/xattr.c:474)\n do_getxattr (fs/xattr.c:800)\n path_getxattrat (fs/xattr.c:868)\n do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n\n The buggy address is located 80 bytes inside of\n allocated 84-byte region in cache kmalloc-96\n\nCompute the size the record needs and require ef->size to cover it."}], "lastModified": "2026-09-16T15:18:07.320", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}