PT-2026-27716 · Netfilter+3 · Netfilter+3
Published
2026-01-01
·
Updated
2026-06-16
·
CVE-2026-23351
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel contains a use-after-free issue within the pipapo set type in the netfilter module. A large number of expired elements can cause the garbage collection process to run for an extended period in a non-preemptible context, potentially leading to soft lockup warnings and RCU stall reports, resulting in a local denial of service. The issue arises because expired elements remain accessible to both the packet path and userspace dumpers via a live copy of the data structure. The garbage collection process has been split into unlink and reclaim phases to address this.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
DoS
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Linuxmint
Linux Kernel
Ubuntu
Netfilter