Import Source
https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-77658.json
JSON Data
https://api.osv.dev/v1/vulns/AZL-77658
Upstream
Published
2026-02-14T17:15:58Z
Modified
2026-08-28T17:47:51.342095967Z
Summary
CVE-2026-23204 affecting package kernel for versions less than 6.6.126.1-1
Details

In the Linux kernel, the following vulnerability has been resolved:

net/sched: clsu32: use skbheaderpointercareful()

skbheaderpointer() does not fully validate negative @offset values.

Use skbheaderpointer_careful() instead.

GangMin Kim provided a report and a repro fooling u32_classify():

BUG: KASAN: slab-out-of-bounds in u32classify+0x1180/0x11b0 net/sched/clsu32.c:221

References

Affected packages

Azure Linux:3 / kernel

Package

Name
kernel
Purl
pkg:rpm/azure-linux/kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.6.126.1-1

Database specific

source
"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-77658.json"