CVE-2026-80586

CVE CVE-2026-80586EUVD EUVD-2026-66501Published 2026-08-26T14:37:41.000ZLast changed 2026-08-27T05:02:07.000ZCVSS 9.8

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 648ef4b88673dadb8463bf0d4b10fbf33d55def8 <27ed642a4e7e4b5df4b8522c72c457a67e052493; 648ef4b88673dadb8463bf0d4b10fbf33d55def8 <1fade1b2ac5b1a4948e538fae7313bea57b5ac36; 648ef4b88673dadb8463bf0d4b10fbf33d55def8 <26dac5c9ffb20812b475fdf253eb04fab99cff3b; patch: 7.2; patch: 6.12.105; 648ef4b88673dadb8463bf0d4b10fbf33d55def8 <35772b4981f38ba8059372cde8753e8e477e98ec; 5.6; 648ef4b88673dadb8463bf0d4b10fbf33d55def8 <192878df582c51d440bf7b91a15f297f29f2b596; 648ef4b88673dadb8463bf0d4b10fbf33d55def8 <b1256090816ec46011601e084be580731df58fc7; patch: 6.18.46; patch: 7.1.10; patch: 5.15.217; 648ef4b88673dadb8463bf0d4b10fbf33d55def8 <15e35fdad7a5576bf3f1c8d688877aeb5d1b506b; patch: 0; patch: 5.10.266; patch: 6.6.153; patch: 6.1.184; 648ef4b88673dadb8463bf0d4b10fbf33d55def8 <4e80eff5c1c893aca2ac1d202f0b256d2e52ecde

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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