Buffer Access with Incorrect Length Value in Linux kernel - CVE-2026-99107
Published: October 29, 2026
Vulnerability identifier: #VU158478
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-99107
CWE-ID: CWE-805
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger incorrect memory operations that may cause kernel memory corruption and a denial of service.
The vulnerability exists due to incorrect memory-operation size calculations in the Linux kernel NTFS ntfs_new_attr_flags() function when resizing an attribute stored in an extent MFT record. A local user can trigger this attribute-resizing operation to cause the base MFT record pointer to be passed to ntfs_attr_record_resize() instead of the extent record pointer, resulting in incorrect memmove size calculations that may corrupt kernel memory.
Affected software
Linux kernel
How to mitigate CVE-2026-99107
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3