5.5

CVE-2026-31628: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-31628DEBIAN-CVE-2026-31628
Published 24-04-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-31628 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.17%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 53 · Related 51
MGASA-2026-0108MGASA-2026-0110OPENSUSE-SU-2026:10703-1OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1

Timeline

  1. 24-04-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

+0.04 pp

From 0.13% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.17%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu158 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136 | < 7.0.0-27.27
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64 | < 7.0.0-1008.8
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9, < ed7a3a246309ccc807238f1b4f159ee6d37ff9c4 | ≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9, < 0548529af20e68c6552817834b766646dd3bd7a7 | ≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9, < 1272cfedf4cd1019ddf583917a99b62f2d3645bb | ≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9, < 91f02726b2203b71545713ecb7fb006e60a2d66f | ≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9, < b731aca06387b195058a9f6449a03b62efa1bd10 | ≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9, < ad17f07e95e6e8505e2153e5b391f0d27eacce25 | ≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9, < e6af5286efe5a56128b34032572c9ce9ebeccda3 | ≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9, < 546785c719418c6166834a47e372a88f5f7ae893 | ≥ f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9, < e55d98e7756135f32150b9b8f75d580d0d4b2dd3 | 5abd1583e06b3963e5c9d915760367de86808b78 | 4ba461d426490b6ed7e8298c4d3b7a13aa5d2686 | 5a63725cd18fcee2af6ec46ccb856b64ad3077b4 | ≥ 3.16.58, < 3.17 | ≥ 4.4.144, < 4.5 | ≥ 4.9.102, < 4.10 | 4.14
  • linux_kernelEOL≥ 3.16.58, < 3.17 | ≥ 4.4.144, < 4.5 | ≥ 4.9.102, < 4.10 | ≥ 4.14.1, < 5.10.253 | ≥ 5.11, < 5.15.203 | ≥ 5.16, < 6.1.169 | ≥ 6.2, < 6.6.135 | ≥ 6.7, < 6.12.82 | ≥ 6.13, < 6.18.23 | ≥ 6.19, < 6.19.13 | ≥ 7.0, < 7.0.1 | 4.14
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.13-1

3 vendors · 161 products

References

49 links
Show all 49 references