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
2026-04-11T12:44:31.186281Z
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 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49776.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
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"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
4.10.0
Fixed
4.14.300
Type
ECOSYSTEM
Events
Introduced
4.15.0
Fixed
4.19.267
Type
ECOSYSTEM
Events
Introduced
4.20.0
Fixed
5.4.225
Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.10.156
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.80
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.0.10

Database specific

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