PT-2026-26579 · Unknown+4 · Xt Idletimer+4
CVE-2026-23274
·
Published
2026-01-01
·
Updated
2026-07-10
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 an issue within the netfilter module, specifically in the
xt IDLETIMER component. The problem arises from the reuse of ALARM timer labels by IDLETIMER revision 0 rules, which call mod timer() on an uninitialized timer list (timer->timer) if the label was initially created by revision 1 with XT IDLETIMER ALARM. This can lead to debugobjects warnings and potentially a system panic when panic on warn=1. The issue is addressed by preventing the insertion of revision 0 rules when an existing timer with the same label is of the ALARM type.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use of Uninitialized Resource
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Weakness Enumeration
Related Identifiers
Affected Products
Linuxmint
Linux Kernel
Ubuntu
Netfilter
Xt Idletimer