5.5

CVE-2026-31767: linux Divide By Zero

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-31767DEBIAN-CVE-2026-31767
Published 01-05-2026Last modified 21-10-2026
Open JSON

Vulnerability summary

CVE-2026-31767 is a medium (CVSS 5.5) Divide By Zero vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5% 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
0.16%
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 26 · Related 26
OPENSUSE-SU-2026:21555-1SUSE-SU-2026:22108-1SUSE-SU-2026:22137-1SUSE-SU-2026:22433-1SUSE-SU-2026:22458-1SUSE-SU-2026:23066-1

Timeline

  1. 01-05-2026
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: drm/i915/dsi: Don't do DSC horizontal timing adjustments in command mode Stop adjusting the horizontal timing values based on the compression ratio in command mode. Bspec seems to be telling us to do this only in video mode, and this is also how the Windows driver does things. This should also fix a div-by-zero on some machines because the adjusted htotal ends up being so small that we end up with line_time_us==0 when trying to determine the vtotal value in command mode. Note that this doesn't actually make the display on the Huawei Matebook E work, but at least the kernel no longer explodes when the driver loads. (cherry picked from commit 0b475e91ecc2313207196c6d7fd5c53e1a878525)

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

+0.04 pp

From 0.12% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.16%

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

Affected systems

Ubuntu145 products
  • linuxAll versions (No fix recorded) | < 6.8.0-136.136
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1061.64
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 53693f02d80e0a909e76c2a25f8aac8515f959db, < 481f7a463ae4bea9503ae7fa1481ad75dc872af4 | ≥ 53693f02d80e0a909e76c2a25f8aac8515f959db, < 55efe8402f46af8399c8b634a18b130a05fd7820 | ≥ 53693f02d80e0a909e76c2a25f8aac8515f959db, < 86e926b108880c0109b8635e459450447156aeb7 | ≥ 53693f02d80e0a909e76c2a25f8aac8515f959db, < 33b5336e4fd8ba0e40a12989cadb3f5534a0f9e4 | ≥ 53693f02d80e0a909e76c2a25f8aac8515f959db, < 4dfce79e098915d8e5fc2b9e1d980bc3251dd32c | 5.6
  • linux_kernel≥ 5.6, < 6.12.81 | ≥ 6.13, < 6.18.22 | ≥ 6.19, < 6.19.12 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.12.85-1 | < 6.19.12-1

3 vendors · 148 products

References

23 links
Show all 23 references