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

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Summary

CVECVE-2026-23245
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-18 11:16:16 UTC
Updated2026-04-18 09:16:14 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.000150000 probability, percentile 0.032890000 (date 2026-04-19)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected a51c328df3106663879645680609eb49b3ff6444 fc98fd8d214693be91253d9a88cdf8e5e143d124 git Not specified
CNA Linux Linux affected a51c328df3106663879645680609eb49b3ff6444 8b1251bbf0f10ac745ed74bad4d3b433caa1eeae git Not specified
CNA Linux Linux affected a51c328df3106663879645680609eb49b3ff6444 dfc314d7c767e350f78a46a8f8b134f80e8ad432 git Not specified
CNA Linux Linux affected a51c328df3106663879645680609eb49b3ff6444 035d0d09d5ab3ed3e93d18cde2b562a6719eea23 git Not specified
CNA Linux Linux affected a51c328df3106663879645680609eb49b3ff6444 04d75529dc0f9be78786162ebab7424af4644df2 git Not specified
CNA Linux Linux affected a51c328df3106663879645680609eb49b3ff6444 58b162e318d0243ad2d7d92456c0873f2494c351 git Not specified
CNA Linux Linux affected a51c328df3106663879645680609eb49b3ff6444 62413a9c3cb183afb9bb6e94dd68caf4e4145f4c git Not specified
CNA Linux Linux affected 5.8 Not specified
CNA Linux Linux unaffected 5.8 semver Not specified
CNA Linux Linux unaffected 5.10.253 5.10.* semver Not specified
CNA Linux Linux unaffected 6.1.167 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.130 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.78 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.18 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.8 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/58b162e318d0243ad2d7d92456c0873f2494c351 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/04d75529dc0f9be78786162ebab7424af4644df2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fc98fd8d214693be91253d9a88cdf8e5e143d124 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/62413a9c3cb183afb9bb6e94dd68caf4e4145f4c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8b1251bbf0f10ac745ed74bad4d3b433caa1eeae 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/035d0d09d5ab3ed3e93d18cde2b562a6719eea23 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/dfc314d7c767e350f78a46a8f8b134f80e8ad432 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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