5.5

CVE-2026-23443: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-23443DEBIAN-CVE-2026-23443
Published 03-04-2026Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2026-23443 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.6% 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
0.12%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
SUSE-SU-2026:21834-1SUSE-SU-2026:2238-1SUSE-SU-2026:4282-1

Timeline

  1. 03-04-2026
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ACPI: processor: Fix previous acpi_processor_errata_piix4() fix After commi f132e089fe89 ("ACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()"), device pointers may be dereferenced after dropping references to the device objects pointed to by them, which may cause a use-after-free to occur. Moreover, debug messages about enabling the errata may be printed if the errata flags corresponding to them are unset. Address all of these issues by moving message printing to the points in the code where the errata flags are set.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.12%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.12% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.12%

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

Ubuntu91 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ 06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5, < 68408e8f9e366ad9850a66ac65cb569f13bf6cd4 | ≥ ad86ac604f8391c0212a91412d4f764c7a85f254, < 2e369ba9eb7b8a06e9cc35a3e7fe73e59272f8c2 | ≥ 01e8751b37a366b1ca561add0042f2ceb18c03bf, < edf4c2aaee08e8fd503fbae705c801e92a0b55d7 | ≥ b803811485ac0b2f774b6bf3abc8b999ba3b7033, < e0c470049344e9346fff79d7e2362212c216665e | ≥ 29f60d3d06818d40118a30d663231f027ae87a05, < 98473309a36acc271009b85e0bb53a4c0dddf5c2 | ≥ 0398b641be2b66c2fc7e0163c606ef19372e7ad5, < 8583f62259e1b315d5239371adfb36939cdab741 | ≥ f132e089fe89cadc2098991f0a3cb05c3f824ac6, < bf504b229cb8d534eccbaeaa23eba34c05131e25 | ≥ 5.15.202, < 5.15.203 | ≥ 6.1.165, < 6.1.167 | ≥ 6.6.128, < 6.6.130 | ≥ 6.12.75, < 6.12.78 | ≥ 6.18.16, < 6.18.20 | ≥ 6.19.6, < 6.19.10
  • linux_kernel≥ 6.1.165, < 6.1.167 | ≥ 6.6.128, < 6.6.130 | ≥ 6.12.75, < 6.12.78 | ≥ 6.18.16, < 6.18.20 | ≥ 6.19.6, < 6.19.10 | 5.15.202
Debian1 product
  • linux< 6.19.10-1

3 vendors · 94 products

References

11 links
Show all 11 references