5.5

CVE-2025-21996: linux Use of Uninitialized Resource

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-21996DEBIAN-CVE-2025-21996
Published 03-04-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-21996 is a medium (CVSS 5.5) Use of Uninitialized Resource vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.9% 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
0.21%
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 55 · Related 50
DLA-4178-1DLA-4193-1DSA-5900-1MGASA-2025-0142MGASA-2025-0146SUSE-SU-2025:01614-1

Timeline

  1. 03-04-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: drm/radeon: fix uninitialized size issue in radeon_vce_cs_parse() On the off chance that command stream passed from userspace via ioctl() call to radeon_vce_cs_parse() is weirdly crafted and first command to execute is to encode (case 0x03000001), the function in question will attempt to call radeon_vce_cs_reloc() with size argument that has not been properly initialized. Specifically, 'size' will point to 'tmp' variable before the latter had a chance to be assigned any value. Play it safe and init 'tmp' with 0, thus ensuring that radeon_vce_cs_reloc() will catch an early error in cases like these. Found by Linux Verification Center (linuxtesting.org) with static analysis tool SVACE. (cherry picked from commit 2d52de55f9ee7aaee0e09ac443f77855989c6b68)

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

0.00 pp

From 0.21% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.21%

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

Ubuntu137 products
  • linuxAll versions (No fix recorded) | < 5.4.0-218.238 | < 5.15.0-142.152 | < 6.8.0-84.84
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1147.157 | < 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≥ 2fc5703abda201f138faf63bdca743d04dbf4b1a, < 0effb378ebce52b897f85cd7f828854b8c7cb636 | ≥ 2fc5703abda201f138faf63bdca743d04dbf4b1a, < 5b4d9d20fd455a97920cf158dd19163b879cf65d | ≥ 2fc5703abda201f138faf63bdca743d04dbf4b1a, < 9b2da9c673a0da1359a2151f7ce773e2f77d71a9 | ≥ 2fc5703abda201f138faf63bdca743d04dbf4b1a, < 78b07dada3f02f77762d0755a96d35f53b02be69 | ≥ 2fc5703abda201f138faf63bdca743d04dbf4b1a, < 3ce08215cad55c10a6eeeb33d3583b6cfffe3ab8 | ≥ 2fc5703abda201f138faf63bdca743d04dbf4b1a, < dd1801aa01bba1760357f2a641346ae149686713 | ≥ 2fc5703abda201f138faf63bdca743d04dbf4b1a, < f5e049028124f755283f2c07e7a3708361ed1dc8 | ≥ 2fc5703abda201f138faf63bdca743d04dbf4b1a, < dd8689b52a24807c2d5ce0a17cb26dc87f75235c | 3.15
  • linux_kernel≥ 3.15, < 5.4.292 | ≥ 5.5, < 5.10.236 | ≥ 5.11, < 5.15.180 | ≥ 5.16, < 6.1.132 | ≥ 6.2, < 6.6.85 | ≥ 6.7, < 6.12.21 | ≥ 6.13, < 6.13.9 | 6.14:rc1 | 6.14:rc2 | 6.14:rc3 | 6.14:rc4 | 6.14:rc5 | 6.14:rc6 | 6.14:rc7
Debian1 product
  • linux< 6.1.133-1 | < 6.12.21-1

3 vendors · 140 products

References

54 links
Show all 54 references