CVE-2026-22976 — NULL Pointer Dereference in Linux
Severity
5.5MEDIUMNVD
OSV7.8
EPSS
0.0%
top 95.67%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJan 21
Latest updateApr 13
Description
In the Linux kernel, the following vulnerability has been resolved:
net/sched: sch_qfq: Fix NULL deref when deactivating inactive aggregate in qfq_reset
`qfq_class->leaf_qdisc->q.qlen > 0` does not imply that the class
itself is active.
Two qfq_class objects may point to the same leaf_qdisc. This happens
when:
1. one QFQ qdisc is attached to the dev as the root qdisc, and
2. another QFQ qdisc is temporarily referenced (e.g., via qdisc_get()
/ qdisc_put()) and is pending to be destroyed, as …
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6
Affected Packages6 packages
▶CVEListV5linux/linux0545a3037773512d3448557ba048cebb73b3e4af — 6116a83ec167d3ab1390cded854d237481f41b63+7
Patches
🔴Vulnerability Details
9OSV▶
linux-aws-5.15, linux-gcp-5.15, linux-gke, linux-hwe-5.15, linux-intel-iotg-5.15, linux-lowlatency-hwe-5.15, linux-oracle-5.15 vulnerabilities↗2026-03-17