CVE-2026-89612
- Source
- https://cve.org/CVERecord?id=CVE-2026-89612
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89612.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-89612
- Downstream
- Published
- 2026-09-11T19:45:13Z
- Modified
- 2026-09-14T03:46:17Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- ntfs: reject invalid MFT LCNs from boot sector
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89612.json" }- References
-
- https://git.kernel.org/stable/c/8f8420b68a6f05ca2b03779d8208814ec539b9e5
- https://git.kernel.org/stable/c/cc9d09fef78410bcd37ac05168cbd5f6dd75d3d2
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89612.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-89612
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git