CVE-2026-23245

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa51c328df3106663879645680609eb49b3ff6444 < fc98fd8d214693be91253d9a88cdf8e5e143d124affected
LinuxLinuxa51c328df3106663879645680609eb49b3ff6444 < 8b1251bbf0f10ac745ed74bad4d3b433caa1eeaeaffected
LinuxLinuxa51c328df3106663879645680609eb49b3ff6444 < dfc314d7c767e350f78a46a8f8b134f80e8ad432affected
LinuxLinuxa51c328df3106663879645680609eb49b3ff6444 < 035d0d09d5ab3ed3e93d18cde2b562a6719eea23affected
LinuxLinuxa51c328df3106663879645680609eb49b3ff6444 < 04d75529dc0f9be78786162ebab7424af4644df2affected
LinuxLinuxa51c328df3106663879645680609eb49b3ff6444 < 58b162e318d0243ad2d7d92456c0873f2494c351affected
LinuxLinuxa51c328df3106663879645680609eb49b3ff6444 < 62413a9c3cb183afb9bb6e94dd68caf4e4145f4caffected
LinuxLinux5.8affected
LinuxLinux0 < 5.8unaffected
LinuxLinux5.10.253 <= 5.10.*unaffected
LinuxLinux6.1.167 <= 6.1.*unaffected
LinuxLinux6.6.130 <= 6.6.*unaffected
LinuxLinux6.12.78 <= 6.12.*unaffected
LinuxLinux6.18.18 <= 6.18.*unaffected
LinuxLinux6.19.8 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References