CVE-2025-39764 Affecting kernel-tools-libs-devel package, versions *


Severity

Recommended
low

Based on CentOS security rating.

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  • Snyk IDSNYK-CENTOS8-KERNELTOOLSLIBSDEVEL-12647628
  • published12 Sept 2025
  • disclosed11 Sept 2025

Introduced: 11 Sep 2025

NewCVE-2025-39764  (opens in a new tab)

How to fix?

There is no fixed version for Centos:8 kernel-tools-libs-devel.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-tools-libs-devel package and not the kernel-tools-libs-devel package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

netfilter: ctnetlink: remove refcounting in expectation dumpers

Same pattern as previous patch: do not keep the expectation object alive via refcount, only store a cookie value and then use that as the skip hint for dump resumption.

AFAICS this has the same issue as the one resolved in the conntrack dumper, when we do if (!refcount_inc_not_zero(&exp->use))

to increment the refcount, there is a chance that exp == last, which causes a double-increment of the refcount and subsequent memory leak.

CVSS Base Scores

version 3.1