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VULNERABILITIES

CVE-2026-80586 Details

Description

In the Linux kernel, the following vulnerability has been resolved: mptcp: options: reset DSS fields in case of unexpected size A remote peer could send a malformed DSS with a wrong size, followed by another DSS or MPC + Data. In this case, the first suboption will be ignored, but leaving some fields written, which could lead to inconsistency or access uninitialized data. Explicitly reset the fields that could have been modified in case of unexpected size.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: kernel.orgCVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://git.kernel.org/stable/c/15e35fdad7a5576bf3f1c8d688877aeb5d1b506b kernel.org
https://git.kernel.org/stable/c/192878df582c51d440bf7b91a15f297f29f2b596 kernel.org
https://git.kernel.org/stable/c/1fade1b2ac5b1a4948e538fae7313bea57b5ac36 kernel.org
https://git.kernel.org/stable/c/26dac5c9ffb20812b475fdf253eb04fab99cff3b kernel.org
https://git.kernel.org/stable/c/27ed642a4e7e4b5df4b8522c72c457a67e052493 kernel.org

see all 8 references

Weakness Enumeration

No weakness enumeration is available for this CVE.

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-80586
NVD Published Date:
Aug 26, 2026
NVD Last Modified:
Aug 27, 2026
Source:
kernel.org
CVE-2026-80586 Details - Not Deferred