5.5

CVE-2025-21918: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-21918DEBIAN-CVE-2025-21918
Published 01-04-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-21918 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.7% 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
0.20%
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 30 · Related 28
DLA-4193-1DSA-5900-1SUSE-SU-2025:01614-1SUSE-SU-2025:01707-1SUSE-SU-2025:01919-1SUSE-SU-2025:01951-1

Timeline

  1. 01-04-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: Fix NULL pointer access Resources should be released only after all threads that utilize them have been destroyed. This commit ensures that resources are not released prematurely by waiting for the associated workqueue to complete before deallocating them.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

0.00 pp

From 0.20% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.20%

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

Ubuntu126 products
  • linuxAll versions (No fix recorded) | < 6.8.0-84.84
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1039.41
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ b9aa02ca39a49740926c2c450a1505a4a0f8954a, < 7a735a8a46f6ebf898bbefd96659ca5da798bce0 | ≥ b9aa02ca39a49740926c2c450a1505a4a0f8954a, < 46fba7be161bb89068958138ea64ec33c0b446d4 | ≥ b9aa02ca39a49740926c2c450a1505a4a0f8954a, < 079a3e52f3e751bb8f5937195bdf25c5d14fdff0 | ≥ b9aa02ca39a49740926c2c450a1505a4a0f8954a, < 592a0327d026a122e97e8e8bb7c60cbbe7697344 | ≥ b9aa02ca39a49740926c2c450a1505a4a0f8954a, < b13abcb7ddd8d38de769486db5bd917537b32ab1 | 5.16
  • linux_kernel≥ 5.16, < 6.1.133 | ≥ 6.2, < 6.6.83 | ≥ 6.7, < 6.12.19 | ≥ 6.13, < 6.13.7 | 6.14:rc1 | 6.14:rc2 | 6.14:rc3 | 6.14:rc4 | 6.14:rc5
Debian1 product
  • linux< 6.1.133-1 | < 6.12.19-1

3 vendors · 129 products

References

29 links
Show all 29 references