CVE-2026-80586

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux648ef4b88673dadb8463bf0d4b10fbf33d55def8 < 15e35fdad7a5576bf3f1c8d688877aeb5d1b506baffected
LinuxLinux648ef4b88673dadb8463bf0d4b10fbf33d55def8 < b1256090816ec46011601e084be580731df58fc7affected
LinuxLinux648ef4b88673dadb8463bf0d4b10fbf33d55def8 < 192878df582c51d440bf7b91a15f297f29f2b596affected
LinuxLinux648ef4b88673dadb8463bf0d4b10fbf33d55def8 < 26dac5c9ffb20812b475fdf253eb04fab99cff3baffected
LinuxLinux648ef4b88673dadb8463bf0d4b10fbf33d55def8 < 4e80eff5c1c893aca2ac1d202f0b256d2e52ecdeaffected
LinuxLinux648ef4b88673dadb8463bf0d4b10fbf33d55def8 < 1fade1b2ac5b1a4948e538fae7313bea57b5ac36affected
LinuxLinux648ef4b88673dadb8463bf0d4b10fbf33d55def8 < 27ed642a4e7e4b5df4b8522c72c457a67e052493affected
LinuxLinux648ef4b88673dadb8463bf0d4b10fbf33d55def8 < 35772b4981f38ba8059372cde8753e8e477e98ecaffected
LinuxLinux5.6affected
LinuxLinux0 < 5.6unaffected
LinuxLinux5.10.266 <= 5.10.*unaffected
LinuxLinux5.15.217 <= 5.15.*unaffected
LinuxLinux6.1.184 <= 6.1.*unaffected
LinuxLinux6.6.153 <= 6.6.*unaffected
LinuxLinux6.12.105 <= 6.12.*unaffected
LinuxLinux6.18.46 <= 6.18.*unaffected
LinuxLinux7.1.10 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References