5.5

CVE-2026-43123: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-43123DEBIAN-CVE-2026-43123
Published 06-05-2026Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2026-43123 is a medium (CVSS 5.5) NULL Pointer Dereference 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 · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 38 · Related 38
OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1SUSE-SU-2026:23221-1

Timeline

  1. 06-05-2026
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: fbcon: check return value of con2fb_acquire_newinfo() If fbcon_open() fails when called from con2fb_acquire_newinfo() then info->fbcon_par pointer remains NULL which is later dereferenced. Add check for return value of the function con2fb_acquire_newinfo() to avoid it. Found by Linux Verification Center (linuxtesting.org) with SVACE.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

+0.03 pp

From 0.13% on 20-09-2026

20-09-202620-10-2026
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

Ubuntu157 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-134.134
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1060.63
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e, < d3e535533767c85788529e626478718b7e95a59f | ≥ d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e, < 3b5a754ec86bc6064af9aca76eb191c2405e6b0c | ≥ d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e, < a785c4e2a999c2d51dfcf40d317cfb30cc735d2c | ≥ d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e, < 0b038c0be6827dd2dbb1ce4f8d92d97c80cbe9cc | ≥ d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e, < 11a93180a70bb3095a9bd80d113d9277e30d9959 | ≥ d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e, < f57b61624c86ef8f87f6e6b7dd0755de03d90e89 | ≥ d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e, < 011a0502801c8536f64141a2b61362c14f456544 | 2.6.23
  • linux_kernel≥ 2.6.23, < 5.15.203 | ≥ 5.16, < 6.1.165 | ≥ 6.2, < 6.6.128 | ≥ 6.7, < 6.12.75 | ≥ 6.13, < 6.18.16 | ≥ 6.19, < 6.19.6
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.6-1

3 vendors · 160 products

References

36 links
Show all 36 references