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CVE-2026-98235

Unknown

Last modified

CVE-2026-98235 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: release tail references on DELACTION failure A batched RTM_DELACTION request takes a temporary reference on each action before attempting any deletion. tcf_action_delete() clears each processed slot and drops its temporary reference before attempting the deletion.

Description

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: release tail references on DELACTION failure A batched RTM_DELACTION request takes a temporary reference on each action before attempting any deletion. tcf_action_delete() clears each processed slot and drops its temporary reference before attempting the deletion. If deletion fails, tca_action_gd() calls tcf_action_put_many() to release the remaining references, but its tcf_act_for_each_action() iterator stops at the first NULL slot. When a batch stops at an action bound to a filter, this leaks a reference on each subsequent action. A later delete of an unbound action can then return success without removing it from the IDR. Walk the full array in tcf_action_put_many() and skip NULL slots to release the references held on the unprocessed actions.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= a0e947c9ccffe47d45aca793d9e7fe4f4494e381, < 9eaba16f1b6ee19b249e6afd82c27f958d441458; >= a0e947c9ccffe47d45aca793d9e7fe4f4494e381, < 1be63e4579af408d596f0f3165faf1a880631d3b; >= a0e947c9ccffe47d45aca793d9e7fe4f4494e381, < 57b477e46ef2df3483f3488cc713c61c4b384aab; >= a0e947c9ccffe47d45aca793d9e7fe4f4494e381, < 6e05e46fa821a5c1b281355f1f622ac76cb6080a
LinuxLinux6.8

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98235?
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: release tail references on DELACTION failure A batched RTM_DELACTION request takes a temporary reference on each action before attempting any deletion. tcf_action_delete() clears each processed slot and drops its temporary reference before attempting the deletion. If deletion fails, tca_action_gd() calls tcf_action_put_many() to release the remaining references, but its tcf_act_for_each_action() iterator stops at the first NULL slot. When a batch stops at an action bound to a filter, this leaks a reference on each subsequent action. A later delete of an unbound action can then return success without removing it from the IDR. Walk the full array in tcf_action_put_many() and skip NULL slots to release the references held on the unprocessed actions.
How severe is CVE-2026-98235?
Severity scoring for CVE-2026-98235 is pending analysis.
How do I fix CVE-2026-98235?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST