by Kastro CVE-2026-80586
Linux Linux — mptcp: options: reset DSS fields in case of unexpected size
Description · from the CVE record
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.
Affected
ProductAffectedFixed inSource
Linux648ef4b88673dadb8463bf0d4b10fbf33d55def8 – < 15e35fdad7a5576bf3f1c8d688877aeb5d1b506b15e35fdad7a5576bf3f1c8d688877aeb5d1b506bCNA
Linux648ef4b88673dadb8463bf0d4b10fbf33d55def8 – < b1256090816ec46011601e084be580731df58fc7b1256090816ec46011601e084be580731df58fc7CNA
Linux648ef4b88673dadb8463bf0d4b10fbf33d55def8 – < 192878df582c51d440bf7b91a15f297f29f2b596192878df582c51d440bf7b91a15f297f29f2b596CNA
Linux648ef4b88673dadb8463bf0d4b10fbf33d55def8 – < 26dac5c9ffb20812b475fdf253eb04fab99cff3b26dac5c9ffb20812b475fdf253eb04fab99cff3bCNA
Linux648ef4b88673dadb8463bf0d4b10fbf33d55def8 – < 4e80eff5c1c893aca2ac1d202f0b256d2e52ecde4e80eff5c1c893aca2ac1d202f0b256d2e52ecdeCNA
Linux648ef4b88673dadb8463bf0d4b10fbf33d55def8 – < 1fade1b2ac5b1a4948e538fae7313bea57b5ac361fade1b2ac5b1a4948e538fae7313bea57b5ac36CNA
Linux648ef4b88673dadb8463bf0d4b10fbf33d55def8 – < 27ed642a4e7e4b5df4b8522c72c457a67e05249327ed642a4e7e4b5df4b8522c72c457a67e052493CNA
Linux648ef4b88673dadb8463bf0d4b10fbf33d55def8 – < 35772b4981f38ba8059372cde8753e8e477e98ec35772b4981f38ba8059372cde8753e8e477e98ecCNA
Linux5.65.10.266CNA
Scores by source
Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total