5.5

CVE-2025-21775: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-21775DEBIAN-CVE-2025-21775
Published 27-02-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-21775 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.22%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 17 · Related 17
DLA-4102-1SUSE-SU-2025:01919-1SUSE-SU-2025:1177-1SUSE-SU-2025:1178-1SUSE-SU-2025:1180-1SUSE-SU-2025:20190-1

Timeline

  1. 27-02-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: can: ctucanfd: handle skb allocation failure If skb allocation fails, the pointer to struct can_frame is NULL. This is actually handled everywhere inside ctucan_err_interrupt() except for the only place. Add the missed NULL check. Found by Linux Verification Center (linuxtesting.org) with SVACE static analysis tool.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

+0.01 pp

From 0.22% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.22%

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

Ubuntu107 products
  • linux< 6.8.0-78.78
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1035.37
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 2dcb8e8782d8e4c38903bf37b1a24d3ffd193da7, < 84b9ac59978a6a4e0812d1c938fad97306272cef | ≥ 2dcb8e8782d8e4c38903bf37b1a24d3ffd193da7, < e505b83b9ee6aa0ae2f4395f573a66579ae403fb | ≥ 2dcb8e8782d8e4c38903bf37b1a24d3ffd193da7, < b0e592dd46a0a952b41c3bf6c963afdd6a42b526 | ≥ 2dcb8e8782d8e4c38903bf37b1a24d3ffd193da7, < e7e2e2318b1f085044126ba553a4e619842fc36d | ≥ 2dcb8e8782d8e4c38903bf37b1a24d3ffd193da7, < 9bd24927e3eeb85642c7baa3b28be8bea6c2a078 | 5.19
  • linux_kernel≥ 5.19, < 6.1.129 | ≥ 6.2, < 6.6.79 | ≥ 6.7, < 6.12.16 | ≥ 6.13, < 6.13.4 | 6.14:rc1 | 6.14:rc2
Debian1 product
  • linux< 6.1.129-1 | < 6.12.16-1

3 vendors · 110 products

References

20 links
Show all 20 references