CVE-2026-31685

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Source

https://cve.org/CVERecord?id=CVE-2026-31685

Import Source

https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31685.json

JSON Data

https://api.test.osv.dev/v1/vulns/CVE-2026-31685

Downstream

DEBIAN-CVE-2026-31685

Published

2026-04-25T08:47:02.857Z

Modified

2026-04-26T04:22:21.682214Z

Summary

netfilter: ip6t_eui64: reject invalid MAC header for all packets

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).

Database specific

{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31685.json"
}

References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed

9eda5478746ef7dc0e4e537b5a5e4b0ca1027091

Fixed

807d6ee15804df6f01a35c910f09612e858739a6

Fixed

309ae3e9a51a69699ca94eac5fac5688fa562d55

Fixed

fdce0b3590f724540795b874b4c8850c90e6b0a8

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31685.json"

Linux / Kernel

Package

Name: Kernel

Affected ranges

Type: ECOSYSTEM
Events: Introduced

2.6.12

Fixed

6.12.83

Type: ECOSYSTEM
Events: Introduced

6.13.0

Fixed

6.18.24

Type: ECOSYSTEM
Events: Introduced

6.19.0

Fixed

6.19.14

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31685.json"