7.8

CVE-2025-21968: linux Use After Free

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2025-21968DEBIAN-CVE-2025-21968
Published 01-04-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-21968 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.6% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
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: drm/amd/display: Fix slab-use-after-free on hdcp_work [Why] A slab-use-after-free is reported when HDCP is destroyed but the property_validate_dwork queue is still running. [How] Cancel the delayed work when destroying workqueue. (cherry picked from commit 725a04ba5a95e89c89633d4322430cfbca7ce128)

CVSS metrics

5 scores · 4 sources · 2 versions

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≥ da3fd7ac0bcf372cc57117bdfcd725cca7ef975a, < 06acfdef370ae018dad9592369e2d2fd9a40c09e | ≥ da3fd7ac0bcf372cc57117bdfcd725cca7ef975a, < 1397715b011bcdc6ad91b17df7acaee301e89db5 | ≥ da3fd7ac0bcf372cc57117bdfcd725cca7ef975a, < 4964dbc4191ab436877a5e3ecd9c67a4e50b7c36 | ≥ da3fd7ac0bcf372cc57117bdfcd725cca7ef975a, < 378b361e2e30e9729f9a7676f7926868d14f4326 | ≥ da3fd7ac0bcf372cc57117bdfcd725cca7ef975a, < bac7b8b1a3f1a86eeec85835af106cbdc2b9d9f7 | ≥ da3fd7ac0bcf372cc57117bdfcd725cca7ef975a, < 93d701064e56788663d7c5918fbe5e060d5df587 | ≥ da3fd7ac0bcf372cc57117bdfcd725cca7ef975a, < e65e7bea220c3ce8c4c793b4ba35557f4994ab2b | 5.5
  • linux_kernel≥ 5.5, < 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