CVE-2026-89612
ntfs: reject invalid MFT LCNs from boot sector
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 7.2.4
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: ntfs: reject invalid MFT LCNs from boot sector The NTFS boot sector stores the MFT and MFTMirr locations as unsigned 64-bit LCNs, but parse_ntfs_boot_sector() decoded them into an s64. A crafted high-bit value could therefore become negative and pass the existing upper-bound check. The invalid value then propagated into the MFT zone allocator and could result in an out-of-bounds access to lcn_empty_bits_per_page.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 11ccc9107dc460de28af90fac1f42404d9802735 · fixed in 8f8420b68a6f05ca2b03779d8208814ec539b9e5; From 11ccc9107dc460de28af90fac1f42404d9802735 · fixed in cc9d09fef78410bcd37ac05168cbd5f6dd75d3d2
- Linux Linux
7.1
- KernelLinux
From 7.1.0 · fixed in 7.2.4