PT-2026-43939 · Linux · Linux

Published 2026-05-27 · Updated 2026-05-27 · CVE-2026-46072

NVD

In the Linux kernel, the following vulnerability has been resolved:

ntfs3: add buffer boundary checks to run unpack()

run unpack() checks run buf < run last at the top of the while loop but then reads size size and offset size bytes via run unpack s64() without verifying they fit within the remaining buffer. A crafted NTFS image with truncated run data in an MFT attribute triggers an OOB heap read of up to 15 bytes when the filesystem is mounted.

Add boundary checks before each run unpack s64() call to ensure the declared field size does not exceed the remaining buffer.

Found by fuzzing with a source-patched harness (LibAFL + QEMU).

Related Identifiers

CVE-2026-46072

Affected Products

Linux

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-46072 · Security Note
• https://git.kernel.org/stable/c/bf7ac4a1d3bfc6e56e54635c3d331a68170d37c9 · Note
• https://git.kernel.org/stable/c/41aadf5cb482793a24e05aa136224e179a778586 · Note
• https://git.kernel.org/stable/c/e64f7dfcaff79e7dfff9121a382dd77f9b462f62 · Note
• https://git.kernel.org/stable/c/d3012690a7065d9ca86521a525ad11e8af491d45 · Note
• https://git.kernel.org/stable/c/b62567bca47408e6739dee75f02a2113548af875 · Note