net/sched: act_api: release all action references on NEWACTION failure
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
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- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 7 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: release all action references on NEWACTION failure When a batched RTM_NEWACTION request replaces an existing action, tcf_idr_check_alloc() takes a temporary reference on it. If a later action fails to initialize, tcf_action_destroy() uses strict release semantics to clean up the actions initialized so far. For an action bound to a filter, the strict check returns -EPERM without dropping the temporary reference. This error also makes tcf_action_destroy() return before releasing subsequent entries. Any new action initialized between the bound action and the failing entry is leaked together with its reserved IDR slot, preventing reuse of its index. Use tcf_idr_release() to drop each reference held by the batch without rejecting bound actions. This allows cleanup to continue through all initialized entries and preserves the module reference release when an action is destroyed. Explicit action deletion and flushing retain their separate bind-count checks.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.111, 6.18.53, 7.2.7, 7.3
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-97616
- 2026-10-03 Alias added: GHSA-rpwr-33rh-mw75
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-10-21 Fix available: Linux/Linux@1b5730a1c7def8993b3feba764008d1ff5c9dcea, Linux/[email protected] · CNA
- 2026-10-21 1 new reference · CNA
- 2026-10-30 Fix available: Linux/[email protected], Linux/[email protected], Linux/[email protected] +3 · CNA
- 2026-10-30 3 new references · CNA
- 2026-11-07 Affected versions changed · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/b7133be1faa35b38f68d78a9f950f1dddf3eb8e5
- https://git.kernel.org/stable/c/b83a51a83e85411c050c7b16cdc43b331c6565be
- https://git.kernel.org/stable/c/e469765708b1afa9b9565dbafca09e22ec4edfa7
- https://git.kernel.org/stable/c/1b5730a1c7def8993b3feba764008d1ff5c9dcea
- https://git.kernel.org/stable/c/f908c8a969946a45225fd7f9d9a85771e12ae0a8
- https://git.kernel.org/stable/c/64b36eaef6ea5ada9aea4c2cf87099aaa8a4869b
- https://git.kernel.org/stable/c/048617743febf6530111cfb594e9bbbd7918bf67
- https://git.kernel.org/stable/c/478eb5abb51931a152abab068f8a717b7ff480fd
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Sources
- CVE-2026-97616 · CVE Program
- CVE-2026-97616 · NVD
- FIRST EPSS
- GHSA-rpwr-33rh-mw75 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-97616 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences