Vulnerability in Linux

CVE-2025-39978

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.

EPSS: 0.001 (3.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

  • Linux — versions 68fbff68dbea35f9e6f7649dd22fce492a5aedac, 5.14, 0

References

Frequently asked questions

What is CVE-2025-39978?
CVE-2025-39978 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2025-10-15.
How severe is CVE-2025-39978?
High severity. CVSS v3 base score is 7.8 out of 10.