# CVE-2026-22987: linux: In the Linux kernel, the following vulnerability has been resolved:  net/sched: act_api: avoid dereferencing ERR_PTR...

CVE-2026-22987 is fixed in linux on 1 platform by DEBIAN-CVE-2026-22987 (version 6.18.8-1), released January 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-22987
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0012
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 23, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.18.8-1 | [DEBIAN-CVE-2026-22987](https://patchblox.com/security/data/fix/linux/debian-cve-2026-22987.md) | Jan 23, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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