5.5

CVE-2025-21936: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-21936DEBIAN-CVE-2025-21936
Published 01-04-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-21936 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: Bluetooth: Add check for mgmt_alloc_skb() in mgmt_device_connected() Add check for the return value of mgmt_alloc_skb() in mgmt_device_connected() to prevent null pointer dereference.

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

Ubuntu110 products
  • linux< 6.8.0-84.84
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1039.41
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ e96741437ef0a5d18144e790ac894397efda0924, < dc516e66fb28c61b248b393e2ddd63bd7f104969 | ≥ e96741437ef0a5d18144e790ac894397efda0924, < bdb1805c248e9694dbb3ffa8867cef2e52cf7261 | ≥ e96741437ef0a5d18144e790ac894397efda0924, < 7841180342c9a0fd97d54f3e62c7369309b5cd84 | ≥ e96741437ef0a5d18144e790ac894397efda0924, < 7d39387886ffe220323cbed5c155233c3276926b | ≥ e96741437ef0a5d18144e790ac894397efda0924, < d8df010f72b8a32aaea393e36121738bb53ed905 | 5.17
  • linux_kernel≥ 5.17, < 6.1.131 | ≥ 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 · 113 products

References

29 links
Show all 29 references