CVE-2026-80586

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Source
https://cve.org/CVERecord?id=CVE-2026-80586
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80586.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-80586
Downstream
Published
2026-08-26T14:37:41.493Z
Modified
2026-08-28T03:47:29.333416203Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
mptcp: options: reset DSS fields in case of unexpected size
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80586.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
648ef4b88673dadb8463bf0d4b10fbf33d55def8
Fixed
15e35fdad7a5576bf3f1c8d688877aeb5d1b506b
Fixed
b1256090816ec46011601e084be580731df58fc7
Fixed
192878df582c51d440bf7b91a15f297f29f2b596
Fixed
26dac5c9ffb20812b475fdf253eb04fab99cff3b
Fixed
4e80eff5c1c893aca2ac1d202f0b256d2e52ecde
Fixed
1fade1b2ac5b1a4948e538fae7313bea57b5ac36
Fixed
27ed642a4e7e4b5df4b8522c72c457a67e052493
Fixed
35772b4981f38ba8059372cde8753e8e477e98ec

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80586.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.6.0
Fixed
5.10.266
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.217
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.184
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.153
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.105
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.46
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
7.1.10

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80586.json"