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Vulnerability record · CVE-2026-46062 · published 27 May 2026

CVE-2026-46062: Linux kernel integer overflow vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: ntfs3: fix integer overflow in run_unpack() volume boundary check The volume boundary check `lcn + len > sbi->used.bitmap.nbits` uses raw addition which can wrap around for large lcn and len values, bypassing the validation. Use check_add_overflow() as is already done for the adjacent prev_lcn + dlcn and vcn64 + len checks added by commit 3ac37e100385 ("ntfs3: Fix integer overflow in run_unpack()"). Found by fuzzing with a source-patched harness (LibAFL + QEMU).

7.8 CVSS 3.1 High EPSS 0.20% · top 91.7% CWE-190 · Integer overflow
7.8CVSS 3.1 base score
0.20%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References
17 Jun 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: ntfs3: fix integer overflow in run_unpack() volume boundary check The volume boundary check `lcn + len > sbi->used.bitmap.nbits` uses raw addition which can wrap around for large lcn and len values, bypassing the validation. Use check_add_overflow() as is already done for the adjacent prev_lcn + dlcn and vcn64 + len checks added by commit 3ac37e100385 ("ntfs3: Fix integer overflow in run_unpack()"). Found by fuzzing with a source-patched harness (LibAFL + QEMU).

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/424858f9a048057bb8f834bfe03d18f5e477e747 Patch
https://git.kernel.org/stable/c/60dab3e2931f3d792438a77a6cb0cb731c43300b Patch
https://git.kernel.org/stable/c/6175d09c23bec4b60860ee9a0170308ff4b56e10 Patch
https://git.kernel.org/stable/c/984a415f019536ea2d24de9010744e5302a9a948 Patch
https://git.kernel.org/stable/c/a954061b334ec67c79ae9d0cadd83fa521396487 Patch
https://git.kernel.org/stable/c/e73cd5aed6b15e55c1c47577bdb473b5e88d6a69 Patch
https://git.kernel.org/stable/c/f1af27cec07a9fd0847166bdb23c99e86b05bfdc Patch

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Source: NIST National Vulnerability Database (record CVE-2026-46062), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.