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Vulnerability record · CVE-2026-23245 · published 18 March 2026

CVE-2026-23245: Linux kernel vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.13% · top 98.0%
7.8CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
9References
14 Jul 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/035d0d09d5ab3ed3e93d18cde2b562a6719eea23 Patch
https://git.kernel.org/stable/c/04d75529dc0f9be78786162ebab7424af4644df2 Patch
https://git.kernel.org/stable/c/58b162e318d0243ad2d7d92456c0873f2494c351 Patch
https://git.kernel.org/stable/c/62413a9c3cb183afb9bb6e94dd68caf4e4145f4c Patch
https://git.kernel.org/stable/c/8b1251bbf0f10ac745ed74bad4d3b433caa1eeae Patch
https://git.kernel.org/stable/c/dfc314d7c767e350f78a46a8f8b134f80e8ad432 Patch
https://git.kernel.org/stable/c/fc98fd8d214693be91253d9a88cdf8e5e143d124 Patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-082556.html

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Source: NIST National Vulnerability Database (record CVE-2026-23245), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.