linux: In the Linux kernel, the following vulnerability has been resolved: ntfs: reject invalid MFT LCNs from boot sector...
CVE-2026-89612 is fixed in linux on 1 platform by DEBIAN-CVE-2026-89612 (version 7.2.6-1), released September 23, 2026. It is not reported as exploited. Patch Radar priority: Urgent.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 14 | 7.2.6-1 | DEBIAN-CVE-2026-89612 | Sep 23, 2026 |
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