CVE-2026-31628 Linux CVE debrief

Who should care

Linux kernel users and administrators should review and apply patches as necessary. The vulnerability affects various Linux kernel versions. The vulnerability has a medium severity score of 5.5.

Technical summary

The Linux kernel vulnerability CVE-2026-31628 was resolved with a patch. The vulnerability affects Linux kernel versions, including those prior to 3.17, 4.5, 4.10, 5.10.253, 5.15.203, 6.1.169, 6.6.135, 6.12.82, 6.18.23, and 7.0.1. An attacker could potentially leak partial results from previous operations through the hardware divider, under certain circumstances, on Zen1 CPUs. Linux kernel users and administrators should review and apply patches as necessary to mitigate the vulnerability. The vulnerability has a medium severity score of 5.5. Additional details can be found in the official CVE record and NVD detail.

Defensive priority

Apply patches as necessary to mitigate the vulnerability. Review compensating controls for exposed systems while remediation is scheduled and verified.

Recommended defensive actions

• Review Linux kernel versions for vulnerability
• Apply patches as necessary
• Monitor for potential attacks
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Evidence notes

The CVE record was published on 2026-04-24T15:16:42.103Z and last modified on 2026-07-14T13:18:46.023Z. The vulnerability affects Linux kernel versions, including those prior to 3.17, 4.5, 4.10, 5.10.253, 5.15.203, 6.1.169, 6.6.135, 6.12.82, 6.18.23, and 7.0.1. Linux kernel users and administrators should review and apply patches as necessary. The vulnerability has a medium severity score of 5.5. The vulnerability was resolved with a patch. An attacker could potentially leak partial results from previous operations.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.