CVE-2026-80958

Summary

In the Linux kernel, the following vulnerability has been resolved:

dm-pcache: clamp the tail kset read to the segment data region

The tail-kset read in cache_replay(), the writeback worker and the GC worker bounds its length by PCACHE_SEG_SIZE - seg_off, the raw segment size rather than the data region. A tail near the segment end reads past the segment data into the following control area.

Clamp the read to cache_seg_remain(), the data region.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 < 2cd9776fe3f2d88ec22c36d3c8ba09fbf9d5500caffected
LinuxLinux1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 < 1ab55354368d071ebaee4d8c82313955eab65a04affected
LinuxLinux1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 < becf07e2b0053027495ecd671b1f82fb2e615f68affected
LinuxLinux6.18affected
LinuxLinux0 < 6.18unaffected
LinuxLinux6.18.50 <= 6.18.*unaffected
LinuxLinux7.2.4 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References