7.8

CVE-2025-21934: linux Use After Free

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2025-21934DEBIAN-CVE-2025-21934
Published 01-04-2025Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2025-21934 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11.1% 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
0.21%
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 62 · Related 59
DLA-4178-1DLA-4193-1DSA-5900-1SUSE-SU-2025:01614-1SUSE-SU-2025:01707-1SUSE-SU-2025:01919-1

Timeline

  1. 01-04-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: rapidio: fix an API misues when rio_add_net() fails rio_add_net() calls device_register() and fails when device_register() fails. Thus, put_device() should be used rather than kfree(). Add "mport->net = NULL;" to avoid a use after free issue.

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 18-09-2026

18-09-202618-10-2026
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

Ubuntu136 products
  • linuxAll versions (No fix recorded) | < 5.4.0-216.236 | < 5.15.0-140.150 | < 6.8.0-84.84
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1146.156 | < 5.15.0-1084.91 | < 6.8.0-1039.41
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ e8de370188d098bb49483c287b44925957c3c9b6, < d4ec862ce80f64db923a1d942b5d11cf6fc87d36 | ≥ e8de370188d098bb49483c287b44925957c3c9b6, < 88ddad53e4cfb6de861c6d4fb7b25427f46baed5 | ≥ e8de370188d098bb49483c287b44925957c3c9b6, < cdd9f58f7fe41a55fae4305ea51fc234769fd466 | ≥ e8de370188d098bb49483c287b44925957c3c9b6, < a5f5e520e8fbc6294020ff8afa36f684d92c6e6a | ≥ e8de370188d098bb49483c287b44925957c3c9b6, < 2537f01d57f08c527e40bbb5862aa6ff43344898 | ≥ e8de370188d098bb49483c287b44925957c3c9b6, < 22e4977141dfc6d109bf29b495bf2187b4250990 | ≥ e8de370188d098bb49483c287b44925957c3c9b6, < f0aa4ee1cbbf7789907e5a3f6810de01c146c211 | ≥ e8de370188d098bb49483c287b44925957c3c9b6, < b2ef51c74b0171fde7eb69b6152d3d2f743ef269 | 4.6
  • linux_kernel≥ 4.6, < 5.4.291 | ≥ 5.5, < 5.10.235 | ≥ 5.11, < 5.15.179 | ≥ 5.16, < 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 · 139 products

References

63 links
Show all 63 references