5.5

CVE-2026-31603: linux Divide By Zero

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-31603DEBIAN-CVE-2026-31603CGA-3mmw-9c3v-2xcx
Published 24-04-2026Last modified 14-06-2026
Open JSON

Vulnerability summary

CVE-2026-31603 is a medium (CVSS 5.5) Divide By Zero vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.5% 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
0.17%
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 45 · Related 46
OPENSUSE-SU-2026:10703-1OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1

Timeline

  1. 24-04-2026
    PublishedVulnerability first disclosed.
  2. 14-06-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: staging: sm750fb: fix division by zero in ps_to_hz() ps_to_hz() is called from hw_sm750_crtc_set_mode() without validating that pixclock is non-zero. A zero pixclock passed via FBIOPUT_VSCREENINFO causes a division by zero. Fix by rejecting zero pixclock in lynxfb_ops_check_var(), consistent with other framebuffer drivers.

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

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)
Chainguard9 products
  • linux-aws-6.12< 6.12.85-r0
  • linux-aws-6.18< 6.18.31-r0
  • linux-azure-6.18< 6.18.31-r0
  • linux-gcp-6.18< 6.18.31-r0
  • linux-qemu-6.12< 6.12.85-r0
Linux2 products
  • linux≥ 81dee67e215b23f0c98182eece122b906d35765a, < 124a43550db8a74eef080cd4573a4904efe67029 | ≥ 81dee67e215b23f0c98182eece122b906d35765a, < b285a8f3bbb821a93eb37c2740a68ca1d7112a59 | ≥ 81dee67e215b23f0c98182eece122b906d35765a, < 3300b049693138852a4c6738b5f1194a1ee91ddd | ≥ 81dee67e215b23f0c98182eece122b906d35765a, < 779412e0e391fd4a0d12e1d1adaa7bf043de62d7 | ≥ 81dee67e215b23f0c98182eece122b906d35765a, < 2f640c6043aeab31a2f607d7605271860c3b11df | ≥ 81dee67e215b23f0c98182eece122b906d35765a, < 1412ba36597a82e928f20047f41d6c6582dafe8a | ≥ 81dee67e215b23f0c98182eece122b906d35765a, < 6144895a4335a2491c282931f1f2fa610b86339f | ≥ 81dee67e215b23f0c98182eece122b906d35765a, < daf6733bd7c4c5015b431739ac29b0e29021096b | ≥ 81dee67e215b23f0c98182eece122b906d35765a, < 75a1621e4f91310673c9acbcbb25c2a7ff821cd3 | 4.1
  • linux_kernel≥ 4.1, < 6.6.136 | ≥ 6.7, < 6.12.83 | ≥ 6.13, < 6.18.24 | ≥ 6.19, < 6.19.14 | ≥ 7.0, < 7.0.1
Debian1 product
  • linux< 6.1.176-1 | < 6.12.85-1 | < 6.19.14-1

4 vendors · 170 products

References

46 links
Show all 46 references