{"id":"CVE-2026-46062","state":"PUBLISHED","title":"ntfs3: fix integer overflow in run_unpack() volume boundary check","description":"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).","publishedAt":"2026-05-27T12:57:24.416Z","updatedAt":"2026-08-05T12:29:26.689Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"424858f9a048057bb8f834bfe03d18f5e477e747","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"e73cd5aed6b15e55c1c47577bdb473b5e88d6a69","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"a954061b334ec67c79ae9d0cadd83fa521396487","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"60dab3e2931f3d792438a77a6cb0cb731c43300b","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"f1af27cec07a9fd0847166bdb23c99e86b05bfdc","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"6175d09c23bec4b60860ee9a0170308ff4b56e10","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"984a415f019536ea2d24de9010744e5302a9a948","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ntfs3/run.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.86","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.27","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.4","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ntfs3/run.c"]}],"references":["https://git.kernel.org/stable/c/424858f9a048057bb8f834bfe03d18f5e477e747","https://git.kernel.org/stable/c/e73cd5aed6b15e55c1c47577bdb473b5e88d6a69","https://git.kernel.org/stable/c/a954061b334ec67c79ae9d0cadd83fa521396487","https://git.kernel.org/stable/c/60dab3e2931f3d792438a77a6cb0cb731c43300b","https://git.kernel.org/stable/c/f1af27cec07a9fd0847166bdb23c99e86b05bfdc","https://git.kernel.org/stable/c/6175d09c23bec4b60860ee9a0170308ff4b56e10","https://git.kernel.org/stable/c/984a415f019536ea2d24de9010744e5302a9a948"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46062.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46062","state":"PUBLISHED","datePublished":"2026-05-27T12:57:24.416Z","dateUpdated":"2026-08-05T12:29:26.689Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.095Z"},"containers":{"cna":{"title":"ntfs3: fix integer overflow in run_unpack() volume boundary check","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)."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"424858f9a048057bb8f834bfe03d18f5e477e747","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"e73cd5aed6b15e55c1c47577bdb473b5e88d6a69","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"a954061b334ec67c79ae9d0cadd83fa521396487","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"60dab3e2931f3d792438a77a6cb0cb731c43300b","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"f1af27cec07a9fd0847166bdb23c99e86b05bfdc","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"6175d09c23bec4b60860ee9a0170308ff4b56e10","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"984a415f019536ea2d24de9010744e5302a9a948","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ntfs3/run.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.86","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.27","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.4","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ntfs3/run.c"]}],"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"}],"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."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:29:26.689Z"},"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}