Vulnerability Description
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.
References
- https://git.kernel.org/stable/c/048617743febf6530111cfb594e9bbbd7918bf67
- https://git.kernel.org/stable/c/478eb5abb51931a152abab068f8a717b7ff480fd
- https://git.kernel.org/stable/c/64b36eaef6ea5ada9aea4c2cf87099aaa8a4869b
- https://git.kernel.org/stable/c/f908c8a969946a45225fd7f9d9a85771e12ae0a8
FAQ
What is CVE-2026-97616?
CVE-2026-97616 is a documented vulnerability. 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 a...
How severe is CVE-2026-97616?
CVSS scoring is not yet available for CVE-2026-97616. Check NVD for updates.
Is there a patch for CVE-2026-97616?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.