PT-2026-43929 · Linux · Linux

Published 2026-05-27 · Updated 2026-05-27 · CVE-2026-46062

Mitre

CVSS v3.1

7.8

High

Base vector

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

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).

Fix

Related Identifiers

CVE-2026-46062

Affected Products

Linux

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-46062 · Security Note
• https://git.kernel.org/stable/c/6175d09c23bec4b60860ee9a0170308ff4b56e10 · Note
• https://git.kernel.org/stable/c/a954061b334ec67c79ae9d0cadd83fa521396487 · Note
• https://git.kernel.org/stable/c/984a415f019536ea2d24de9010744e5302a9a948 · Note
• https://git.kernel.org/stable/c/f1af27cec07a9fd0847166bdb23c99e86b05bfdc · Note
• https://git.kernel.org/stable/c/60dab3e2931f3d792438a77a6cb0cb731c43300b · Note