CVE-2026-23274

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels IDLETIMER revision 0 rules reuse existing timers by label and always call mod_timer() on timer->timer. If the label was created first by revision 1 with XT_IDLETIMER_ALARM, the object uses alarm timer semantics and timer->timer is never initialized. Reusing that object from revision 0 causes mod_timer() on an uninitialized timer_list, triggering debugobjects warnings and possible panic when panic_on_warn=1. Fix this by rejecting revision 0 rule insertion when...

Affected product and versions

Product

Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP

Affected versions

>= 68983a354a655c35d3fb204489d383a2a051fda7 < 32e937dc6e97f5ed3cdfe3fc0b2b19a05e23fa44, >= 68983a354a655c35d3fb204489d383a2a051fda7 < 144f88054ba0180467356f40895bd660b5dceeec, >= 68983a354a655c35d3fb204489d383a2a051fda7 < 28c7cfaf0c0ab17cbd7754092116fd1af45271f9, >= 68983a354a655c35d3fb204489d383a2a051fda7 < 54080355999381fed4a26129579a5765bab87491, >= 68983a354a655c35d3fb204489d383a2a051fda7 < 5e7ece24c5cb75a60402aad4d803c7898ea40aa9, >= 68983a354a655c35d3fb204489d383a2a051fda7 < f5ef97c13165542480a6ffdbe6f09f40bbb7cbf1, >= 68983a354a655c35d3fb204489d383a2a051fda7 < f228b9ae2a7e84d1153616d8e71c4236cb1f1309, >= 68983a354a655c35d3fb204489d383a2a051fda7 < 329f0b9b48ee6ab59d1ab72fef55fe8c6463a6cf, >= 5.7, >= V3.1.6, >= V3.1.5, >= 5.7 < 5.10.253, >= 5.11 < 5.15.203, >= 5.16 < 6.1.167, >= 6.2 < 6.6.130, >= 6.7 < 6.12.78, >= 6.13 < 6.18.19, >= 6.19 < 6.19.9, 7.0

Fixed versions

5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78, 6.18.19, 6.19.9

Technical data

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

Not available