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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 affected < 2cd9776fe3f2d88ec22c36d3c8ba09fbf9d5500c
1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 affected < 1ab55354368d071ebaee4d8c82313955eab65a04
1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 affected < becf07e2b0053027495ecd671b1f82fb2e615f68
Linux Linux affected
Version Status Constraints
6.18 affected —
0 unaffected < 6.18
6.18.50 unaffected ≤ 6.18.*
7.2.4 unaffected ≤ 7.2.*
7.3-rc1 unaffected ≤ *

No data.

No data.

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/1ab55354368d071ebaee4d8c82313955eab65a04 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/2cd9776fe3f2d88ec22c36d3c8ba09fbf9d5500c cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/becf07e2b0053027495ecd671b1f82fb2e615f68 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-80958 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-80958 cve-icon
History

Sat, 12 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-125
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H'}

threat_severity

Moderate

Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
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.
Title dm-pcache: clamp the tail kset read to the segment data region
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-09-11T19:42:25.861Z

Reserved: 2026-08-26T14:34:25.809Z

Link: CVE-2026-80958

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-11T20:19:01.637

Modified: 2026-09-11T20:19:01.637

Link: CVE-2026-80958

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-11T19:42:25Z

Links: CVE-2026-80958 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-12T02:30:06Z

Weaknesses