CVE-2026-98235

Summary

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

VendorProductVersion RangeStatus
LinuxLinuxa0e947c9ccffe47d45aca793d9e7fe4f4494e381 < 9eaba16f1b6ee19b249e6afd82c27f958d441458affected
LinuxLinuxa0e947c9ccffe47d45aca793d9e7fe4f4494e381 < 1be63e4579af408d596f0f3165faf1a880631d3baffected
LinuxLinuxa0e947c9ccffe47d45aca793d9e7fe4f4494e381 < 57b477e46ef2df3483f3488cc713c61c4b384aabaffected
LinuxLinuxa0e947c9ccffe47d45aca793d9e7fe4f4494e381 < 6e05e46fa821a5c1b281355f1f622ac76cb6080aaffected
LinuxLinux6.8affected
LinuxLinux0 < 6.8unaffected
LinuxLinux6.12.112 <= 6.12.*unaffected
LinuxLinux6.18.54 <= 6.18.*unaffected
LinuxLinux7.2.8 <= 7.2.*unaffected
LinuxLinux7.3-rc4 <= *unaffected

Weaknesses

References