SB20260816336 - Improper input validation in Linux kernel ntfs

Description

This security bulletin contains information about 1 vulnerability.

1) Improper input validation (CVE-ID: CVE-2026-72188)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper input validation in ntfs_lookup_inode_by_name() when parsing directory index entries from a crafted NTFS image. A local user can supply a specially crafted NTFS image to cause a denial of service.

The issue arises because error-marked MFT references read from on-disk metadata are not validated before being returned to callers, which may then interpret a bogus pseudo-errno value.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/83f396d881c4fd312c7fd5fff2c157fc21104464
• https://git.kernel.org/stable/c/d97a36bae86a9a4021562ded2987f904e6bcb1d7