{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-46062", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.095Z", "datePublished": "2026-05-27T12:57:24.416Z", "dateUpdated": "2026-08-05T12:29:26.689Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:29:26.689Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs3: fix integer overflow in run_unpack() volume boundary check\n\nThe volume boundary check `lcn + len > sbi->used.bitmap.nbits` uses raw\naddition which can wrap around for large lcn and len values, bypassing\nthe validation. Use check_add_overflow() as is already done for the\nadjacent prev_lcn + dlcn and vcn64 + len checks added by commit\n3ac37e100385 (\"ntfs3: Fix integer overflow in run_unpack()\").\n\nFound by fuzzing with a source-patched harness (LibAFL + QEMU)." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerability is triggered by parsing a crafted NTFS data-run during mount/file access; NTFS3 is a local block-backed filesystem (not network-reachable), so the attacker supplies a malicious image/removable media that is mounted locally.\nAC:L - The integer overflow is deterministically controlled by the on-disk runlist values the attacker crafts; no race or attacker-uncontrollable condition is involved.\nPR:N - The attacker only needs to craft the malicious filesystem image and requires no privileges on the target; a victim with mount capability performs the mount (captured under UI).\nUI:R - Exploitation requires a victim to mount/access the attacker-supplied malicious NTFS volume (e.g., inserting removable media or mounting a provided image).\nS:U - The out-of-bounds access stays within the kernel's own security authority; there is no cross-boundary escape (no VM/IOMMU boundary crossed).\nC:H - The bypassed boundary check allows out-of-volume LCN ranges, enabling reads of arbitrary on-disk data bypassing access checks and out-of-bounds memory reads, per the sibling fix's own impact description.\nI:H - The same out-of-bounds cluster ranges permit destruction of arbitrary on-disk data and corruption of in-memory bitmap/free-space accounting, giving an attacker-controlled write primitive.\nA:H - Out-of-bounds cluster/bitmap access from a bypassed boundary check readily causes kernel oops/panic or filesystem corruption, denying service." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/ntfs3/run.c" ], "versions": [ { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "424858f9a048057bb8f834bfe03d18f5e477e747", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "e73cd5aed6b15e55c1c47577bdb473b5e88d6a69", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "a954061b334ec67c79ae9d0cadd83fa521396487", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "60dab3e2931f3d792438a77a6cb0cb731c43300b", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "f1af27cec07a9fd0847166bdb23c99e86b05bfdc", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "6175d09c23bec4b60860ee9a0170308ff4b56e10", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "984a415f019536ea2d24de9010744e5302a9a948", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/ntfs3/run.c" ], "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.86", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.27", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.4", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "5.15.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.140" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.86" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.27" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.0.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/424858f9a048057bb8f834bfe03d18f5e477e747" }, { "url": "https://git.kernel.org/stable/c/e73cd5aed6b15e55c1c47577bdb473b5e88d6a69" }, { "url": "https://git.kernel.org/stable/c/a954061b334ec67c79ae9d0cadd83fa521396487" }, { "url": "https://git.kernel.org/stable/c/60dab3e2931f3d792438a77a6cb0cb731c43300b" }, { "url": "https://git.kernel.org/stable/c/f1af27cec07a9fd0847166bdb23c99e86b05bfdc" }, { "url": "https://git.kernel.org/stable/c/6175d09c23bec4b60860ee9a0170308ff4b56e10" }, { "url": "https://git.kernel.org/stable/c/984a415f019536ea2d24de9010744e5302a9a948" } ], "title": "ntfs3: fix integer overflow in run_unpack() volume boundary check", "x_generator": { "engine": "bippy-1.2.0" } } } }