CVE-2022-49776

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Source
https://cve.org/CVERecord?id=CVE-2022-49776
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49776.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-49776
Downstream
Related
Published
2025-05-01T14:09:12.572Z
Modified
2026-04-03T13:14:31.733026711Z
Summary
macvlan: enforce a consistent minimal mtu
Details

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

macvlan: enforce a consistent minimal mtu

macvlan should enforce a minimal mtu of 68, even at link creation.

This patch avoids the current behavior (which could lead to crashes in ipv6 stack if the link is brought up)

$ ip link add macvlan1 link eno1 mtu 8 type macvlan # This should fail ! $ ip link sh dev macvlan1 5: macvlan1@eno1: <BROADCAST,MULTICAST> mtu 8 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether 02:47:6c:24:74:82 brd ff:ff:ff:ff:ff:ff $ ip link set macvlan1 mtu 67 Error: mtu less than device minimum. $ ip link set macvlan1 mtu 68 $ ip link set macvlan1 mtu 8 Error: mtu less than device minimum.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49776.json",
    "cna_assigner": "Linux"
}
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
91572088e3fdbf4fe31cf397926d8b890fdb3237
Fixed
d2fee7d121d189c6dc905b727d60e7043a6655bb
Fixed
650137a7c0b2892df2e5b0bc112d7b09a78c93c8
Fixed
a62aa84fe19eb24d083d600a074c009a0a66d4f3
Fixed
e929ec98c0c3b10d9c07f3776df0c1a02d7a763e
Fixed
e41cbf98df22d08402e65174d147cbb187fe1a33
Fixed
2b055c719d8f94c15ec9b7659978133030c6a353
Fixed
b64085b00044bdf3cd1c9825e9ef5b2e0feae91a

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49776.json"