CVE-2026-46062

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).

References

• https://git.kernel.org/stable/c/60dab3e2931f3d792438a77a6cb0cb731c43300b
• https://git.kernel.org/stable/c/6175d09c23bec4b60860ee9a0170308ff4b56e10
• https://git.kernel.org/stable/c/984a415f019536ea2d24de9010744e5302a9a948
• https://git.kernel.org/stable/c/a954061b334ec67c79ae9d0cadd83fa521396487
• https://git.kernel.org/stable/c/f1af27cec07a9fd0847166bdb23c99e86b05bfdc