CVE-2026-80958
High
Description
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.
SeverityHigh
CVSS7.1
Exploit probability—
Product
Linux
PublishedSep 11, 2026
First seenSep 11, 2026
How to fix
Update
- Linux Linux2cd9776fe3f2d88ec22c36d3c8ba09fbf9d5500c, 1ab55354368d071ebaee4d8c82313955eab65a04, becf07e2b0053027495ecd671b1f82fb2e615f68 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 ≤ v < 2cd9776fe3f2d88ec22c36d3c8ba09fbf9d5500c, 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 ≤ v < 1ab55354368d071ebaee4d8c82313955eab65a04, 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 ≤ v < becf07e2b0053027495ecd671b1f82fb2e615f68, 6.18 | 2cd9776fe3f2d88ec22c36d3c8ba09fbf9d5500c, 1ab55354368d071ebaee4d8c82313955eab65a04, becf07e2b0053027495ecd671b1f82fb2e615f68 |
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