7.8

CVE-2025-39978: linux

CVSS: 7.8v3.1HighDeferred
AliasesUBUNTU-CVE-2025-39978DEBIAN-CVE-2025-39978
Published 15-10-2025Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2025-39978 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 3.8% 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
0.15%
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 33 · Related 29
DLA-4379-1DSA-6053-1MGASA-2025-0309MGASA-2025-0310OPENSUSE-SU-2025:20091-1SUSE-SU-2025:21040-1

Timeline

  1. 15-10-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: Fix potential use after free in otx2_tc_add_flow() This code calls kfree_rcu(new_node, rcu) and then dereferences "new_node" and then dereferences it on the next line. Two lines later, we take a mutex so I don't think this is an RCU safe region. Re-order it to do the dereferences before queuing up the free.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

0.00 pp

From 0.15% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.15%

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

No weakness data has been published for this record.

Affected systems

Ubuntu136 products
  • linuxAll versions (No fix recorded) | < 6.8.0-106.106 | < 6.17.0-6.6
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1050.53 | < 6.17.0-1003.3
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.158-1 | < 6.12.57-1 | < 6.16.10-1
Linux1 product
  • linux≥ 68fbff68dbea35f9e6f7649dd22fce492a5aedac, < 5723120423a753a220b8b2954b273838b9d7e74a | ≥ 68fbff68dbea35f9e6f7649dd22fce492a5aedac, < df2c071061ed52d2225d97b212d27ecedf456b8a | ≥ 68fbff68dbea35f9e6f7649dd22fce492a5aedac, < c41b2941a024d4ec7c768e16ffb10a74b188fced | ≥ 68fbff68dbea35f9e6f7649dd22fce492a5aedac, < a8a63f27c3a8a3714210d32b12fd0f16d0337414 | ≥ 68fbff68dbea35f9e6f7649dd22fce492a5aedac, < d9c70e93ec5988ab07ad2a92d9f9d12867f02c56 | 5.14

3 vendors · 138 products

References

21 links
Show all 21 references