AZL-84201

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Import Source
https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-84201.json
JSON Data
https://api.osv.dev/v1/vulns/AZL-84201
Upstream
Published
2026-04-25T09:16:02Z
Modified
2026-08-28T17:48:03.250795948Z
Summary
CVE-2026-31685 affecting package kernel for versions less than 6.6.137.1-1
Details

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

netfilter: ip6t_eui64: reject invalid MAC header for all packets

eui64_mt6() derives a modified EUI-64 from the Ethernet source address and compares it with the low 64 bits of the IPv6 source address.

The existing guard only rejects an invalid MAC header when par->fragoff != 0. For packets with par->fragoff == 0, eui64_mt6() can still reach eth_hdr(skb) even when the MAC header is not valid.

Fix this by removing the par->fragoff != 0 condition so that packets with an invalid MAC header are rejected before accessing eth_hdr(skb).

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
6.6.137.1-1

Database specific

source 
"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-84201.json"