5.5

CVE-2025-21975: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-21975DEBIAN-CVE-2025-21975
Published 01-04-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-21975 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.5% 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
0.19%
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 46 · Related 41
DLA-4178-1DLA-4193-1DSA-5900-1MGASA-2025-0142MGASA-2025-0146SUSE-SU-2025:01614-1

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: net/mlx5: handle errors in mlx5_chains_create_table() In mlx5_chains_create_table(), the return value of mlx5_get_fdb_sub_ns() and mlx5_get_flow_namespace() must be checked to prevent NULL pointer dereferences. If either function fails, the function should log error message with mlx5_core_warn() and return error pointer.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.19% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.19%

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

Ubuntu125 products
  • linux< 5.15.0-142.152 | < 6.8.0-84.84
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1086.93 | < 6.8.0-1039.41
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 39ac237ce00968545e7298faa9e07ecb7e440fb5, < 15bdd93728369b2c8942a8e5d549d4b5dc04a2d9 | ≥ 39ac237ce00968545e7298faa9e07ecb7e440fb5, < 29c419c64e9b396baeda1d8713d2aa3ba7c0acf6 | ≥ 39ac237ce00968545e7298faa9e07ecb7e440fb5, < 1598307c914ba3d2642a2b03d1ff11efbdb7c6c2 | ≥ 39ac237ce00968545e7298faa9e07ecb7e440fb5, < 637105ef0d46fe5beac15aceb431da3ec832bb00 | ≥ 39ac237ce00968545e7298faa9e07ecb7e440fb5, < 1d34296409a519b4027750e3e82d9e19553a7398 | ≥ 39ac237ce00968545e7298faa9e07ecb7e440fb5, < 093b4aaec97ec048623e3fe1e516fc45a954d412 | ≥ 39ac237ce00968545e7298faa9e07ecb7e440fb5, < eab0396353be1c778eba1c0b5180176f04dd21ce | 5.6
  • linux_kernel≥ 5.6, < 5.10.236 | ≥ 5.11, < 5.15.180 | ≥ 5.16, < 6.1.132 | ≥ 6.2, < 6.6.84 | ≥ 6.7, < 6.12.20 | ≥ 6.13, < 6.13.8 | 6.14:rc1 | 6.14:rc2 | 6.14:rc3 | 6.14:rc4 | 6.14:rc5 | 6.14:rc6
Debian1 product
  • linux< 6.1.133-1 | < 6.12.20-1

3 vendors · 128 products

References

44 links
Show all 44 references