CVE-2026-80586
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- CVE-2026-80586
CVE Details
| Release Date: | 2026-08-26 | |
| Impact: | Important | What is this? |
Description
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.
See more information about CVE-2026-80586 from MITRE CVE dictionary and NIST NVD
NOTE: The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 metrics
| Base Score: | 7.3 |
| Vector String: | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| Version: | 3.1 |
| Attack Vector: | Network |
| Attack Complexity: | Low |
| Privileges Required: | None |
| User Interaction: | None |
| Scope: | Unchanged |
| Confidentiality Impact: | Low |
| Integrity Impact: | Low |
| Availability Impact: | Low |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 10 (kernel-uek) | ELSA-2026-500374 | 2026-10-07 |
| Oracle Linux version 8 (kernel-uek) | ELSA-2026-500249 | 2026-09-04 |
| Oracle Linux version 8 (kernel-uek) | ELSA-2026-500377 | 2026-10-07 |
| Oracle Linux version 9 (kernel-uek) | ELSA-2026-500249 | 2026-09-04 |
| Oracle Linux version 9 (kernel-uek) | ELSA-2026-500374 | 2026-10-07 |
| Oracle Linux version 9 (kernel-uek) | ELSA-2026-500377 | 2026-10-07 |
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