5.5

CVE-2025-21749: linux Improper Locking

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-21749DEBIAN-CVE-2025-21749
Published 27-02-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-21749 is a medium (CVSS 5.5) Improper Locking vulnerability in linux. EPSS estimates a 0.21% 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 (NVD)
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 51 · Related 50
DLA-4102-1DLA-4178-1SUSE-SU-2025:01919-1SUSE-SU-2025:1177-1SUSE-SU-2025:1178-1SUSE-SU-2025:1180-1

Timeline

  1. 27-02-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: rose: lock the socket in rose_bind() syzbot reported a soft lockup in rose_loopback_timer(), with a repro calling bind() from multiple threads. rose_bind() must lock the socket to avoid this issue.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

0.00 pp

From 0.20% 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 | < 6.8.0-64.67
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1146.156 | < 5.15.0-1084.91 | < 6.8.0-1032.34
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b8bf5c3fb778bbb1f3ff7d98ec577c969f687513 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < ed00c5f907d08a647b8bf987514ad8c6b17971a7 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d308661a0f4e7c8e86dfc7074a55ee5894c61538 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 667f61b3498df751c8b3f0be1637e7226cbe3ed0 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < e0384efd45f615603e6869205b72040c209e69cc | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 970cd2ed26cdab2b0f15b6d90d7eaa36538244a5 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 4c04b0ab3a647e76d0e752b013de8e404abafc63 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a1300691aed9ee852b0a9192e29e2bdc2411a7e6 | 2.6.12
  • linux_kernel≥ 2.6.12, < 6.1.129 | ≥ 6.2, < 6.6.78 | ≥ 6.7, < 6.12.14 | ≥ 6.13, < 6.13.3 | 6.14:rc1
Debian1 product
  • linux< 6.1.129-1 | < 6.12.15-1

3 vendors · 139 products

References

57 links
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