What is CVE-2026-22987?

CVE-2026-22987 is a medium-severity vulnerability in Linux, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2026-01-23.

How severe is CVE-2026-22987?

Medium severity. CVSS v3 base score is 5.5 out of 10.

NULL pointer dereference in Linux

CVE-2026-22987

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.

EPSS: 0.001 (1.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions 84a7d6797e6a03705e6b48c613fa424662049d87, 6.17, 0
Linux Linux_kernel — versions 6.19

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2026-22987?: CVE-2026-22987 is a medium-severity vulnerability in Linux, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2026-01-23.
How severe is CVE-2026-22987?: Medium severity. CVSS v3 base score is 5.5 out of 10.