CVE-2026-23245

HighCVSS 7.8/10Last modified Nov 10, 2026

Description

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

net/sched: act_gate: snapshot parameters with RCU on replace

The gate action can be replaced while the hrtimer callback or dump path is walking the schedule list.

Convert the parameters to an RCU-protected snapshot and swap updates under tcf_lock, freeing the previous snapshot via call_rcu(). When REPLACE omits the entry list, preserve the existing schedule so the effective state is unchanged.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected software

VendorProductVersions
LinuxLinux>= a51c328df3106663879645680609eb49b3ff6444, < fc98fd8d214693be91253d9a88cdf8e5e143d124; >= a51c328df3106663879645680609eb49b3ff6444, < 8b1251bbf0f10ac745ed74bad4d3b433caa1eeae; >= a51c328df3106663879645680609eb49b3ff6444, < dfc314d7c767e350f78a46a8f8b134f80e8ad432; >= a51c328df3106663879645680609eb49b3ff6444, < 035d0d09d5ab3ed3e93d18cde2b562a6719eea23; >= a51c328df3106663879645680609eb49b3ff6444, < 04d75529dc0f9be78786162ebab7424af4644df2; >= a51c328df3106663879645680609eb49b3ff6444, < 58b162e318d0243ad2d7d92456c0873f2494c351; >= a51c328df3106663879645680609eb49b3ff6444, < 62413a9c3cb183afb9bb6e94dd68caf4e4145f4c
LinuxLinux5.8
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.6, < *
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.5, < *
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.7, < *
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.6, < *
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.5, < *
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.7, < *
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP>= V3.1.6, < *
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP>= V3.1.5, < *
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP>= V3.1.7, < *
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP>= V3.1.6, < *
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP>= V3.1.5, < *
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP>= V3.1.7, < *
SiemensSIMATIC S7-1500 TM MFP - GNU/Linux subsystem< *
SiemensSIPLUS S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.6, < *
SiemensSIPLUS S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.5, < *
SiemensSIPLUS S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.7, < *

References

Timeline

Published
Mar 18, 2026
Last modified
Nov 10, 2026
NVD status
Modified

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CVE-2026-23245: High severity, CVSS 7.8 | Vulnix