CVE-2026-22987
Medium
Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy syzbot reported a crash in tc_act_in_hw() during netns teardown where tcf_idrinfo_destroy() passed an ERR_PTR(-EBUSY) value as a tc_action pointer, leading to an invalid dereference. Guard against ERR_PTR entries when iterating the action IDR so teardown does not call tc_act_in_hw() on an error pointer.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedJan 23, 2026
First seenJan 23, 2026
How to fix
Update
- linux linux_kernel6.18.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 6.17 ≤ v < 6.18.6, 6.19 | 6.18.6 |
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