CVE-2026-31628

MEDIUMCVSS 5.5/10EPSS 0.13%

Last modified

CVE-2026-31628 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: x86/CPU: Fix FPDSS on Zen1 Zen1's hardware divider can leave, under certain circumstances, partial results from previous operations. Those results can be leaked by another, attacker thread. Fix that with a chicken bit.. EPSS estimates a 0.13% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: x86/CPU: Fix FPDSS on Zen1 Zen1's hardware divider can leave, under certain circumstances, partial results from previous operations. Those results can be leaked by another, attacker thread. Fix that with a chicken bit.

Metrics

CVSS 3.1
5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
0.13%

2.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
LinuxLinux Kernel>= 3.16.58, < 3.17
LinuxLinux Kernel>= 4.4.144, < 4.5
LinuxLinux Kernel>= 4.9.102, < 4.10
LinuxLinux Kernel>= 4.14.1, < 5.10.253
LinuxLinux Kernel>= 5.11, < 5.15.203
LinuxLinux Kernel>= 5.16, < 6.1.169
LinuxLinux Kernel>= 6.2, < 6.6.135
LinuxLinux Kernel>= 6.7, < 6.12.82
LinuxLinux Kernel>= 6.13, < 6.18.23
LinuxLinux Kernel>= 6.19, < 6.19.13
LinuxLinux Kernel>= 7.0, < 7.0.1
LinuxLinux Kernel4.14

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-31628?
In the Linux kernel, the following vulnerability has been resolved: x86/CPU: Fix FPDSS on Zen1 Zen1's hardware divider can leave, under certain circumstances, partial results from previous operations. Those results can be leaked by another, attacker thread. Fix that with a chicken bit.
How severe is CVE-2026-31628?
CVE-2026-31628 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.13% probability of exploitation in the next 30 days.
How do I fix CVE-2026-31628?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-31628?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST