High 7.8Published Mar 18, 2026

CVE-2026-23245net/sched: act_gate: snapshot parameters with RCU on replace

Updated under an hour ago (Oct 27, 2026, 9:23 AM ET)

Does this affect you?

It affects Linux and 5 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

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: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from a51c328df3106663879645680609eb49b3ff6444 before fc98fd8d214693be91253d9a88cdf8e5e143d124; from a51c328df3106663879645680609eb49b3ff6444 before 8b1251bbf0f10ac745ed74bad4d3b433caa1eeae; from a51c328df3106663879645680609eb49b3ff6444 before dfc314d7c767e350f78a46a8f8b134f80e8ad432; from a51c328df3106663879645680609eb49b3ff6444 before 035d0d09d5ab3ed3e93d18cde2b562a6719eea23; from a51c328df3106663879645680609eb49b3ff6444 before 04d75529dc0f9be78786162ebab7424af4644df2; from a51c328df3106663879645680609eb49b3ff6444 before 58b162e318d0243ad2d7d92456c0873f2494c351; from a51c328df3106663879645680609eb49b3ff6444 before 62413a9c3cb183afb9bb6e94dd68caf4e4145f4c	CNA record
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	all versions	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
linux linux_kernel linux:linux_kernel	from 5.8.1 before 5.10.253; from 5.11 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.18; from 6.19 before 6.19.8; 5.8; 7.0; and 1 more ranges	NVD

References

References

https://git.kernel.org/stable/c/fc98fd8d214693be91253d9a88cdf8e5e143d124	patch
https://git.kernel.org/stable/c/8b1251bbf0f10ac745ed74bad4d3b433caa1eeae	patch
https://git.kernel.org/stable/c/dfc314d7c767e350f78a46a8f8b134f80e8ad432	patch
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://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
https://cert-portal.siemens.com/productcert/html/ssa-457936.html
1–10 of 11

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.