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CVE

CVE-2026-80586

mptcp: options: reset DSS fields in case of unexpected size
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CVE

CVE-2026-80586

mptcp: options: reset DSS fields in case of unexpected size

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://git.kernel.org/stable/c/15e35fdad7a5576bf3f1c8d688877aeb5d1b506b, https://git.kernel.org/stable/c/192878df582c51d440bf7b91a15f297f29f2b596, https://git.kernel.org/stable/c/1fade1b2ac5b1a4948e538fae7313bea57b5ac36, https://git.kernel.org/stable/c/26dac5c9ffb20812b475fdf253eb04fab99cff3b, https://git.kernel.org/stable/c/27ed642a4e7e4b5df4b8522c72c457a67e052493, https://git.kernel.org/stable/c/35772b4981f38ba8059372cde8753e8e477e98ec, https://git.kernel.org/stable/c/4e80eff5c1c893aca2ac1d202f0b256d2e52ecde, https://git.kernel.org/stable/c/b1256090816ec46011601e084be580731df58fc7, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80586.json, https://nvd.nist.gov/vuln/detail/CVE-2026-80586, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00399%
EPSS Percentile
0.3199%
Introduced Version
648ef4b88673dadb8463bf0d4b10fbf33d55def8,5.6.0,5.11.0,5.16.0,6.2.0,6.7.0,6.13.0,6.19.0,0
Fix Available
35772b4981f38ba8059372cde8753e8e477e98ec,5.10.266,5.15.217,6.1.184,6.6.153,6.12.105,6.18.46,7.1.10,6.1.187-1,6.12.107-1~deb12u1,6.12.105-1,6.8.0-1036.39,0:6.12.0-207.111.5.1.el10uek,0:5.15.0-325.220.5.el8uek,0:5.15.0-324.217.5.2.el8uek,0:6.12.0-207.111.5.1.el9uek,0:5.15.0-325.220.5.el9uek,0:5.15.0-324.217.5.2.el9uek,1:6.1.186-228.374.amzn2023,1:1.0-0.amzn2023,1:6.18.48-107.148.amzn2023,0:5.10.268-266.1092.amzn2,0:1.0-0.amzn2,0:5.15.220-153.252.amzn2

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