linux: In the Linux kernel, the following vulnerability has been resolved: macvlan: enforce a consistent minimal mtu macvl...
CVE-2022-49776 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49776, released May 1, 2025. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 12.15 (bookworm) | 6.0.10-1 | DEBIAN-CVE-2022-49776 | May 1, 2025 |
| linux · Debian 13.5 (trixie) | 6.0.10-1 | DEBIAN-CVE-2022-49776 | May 1, 2025 |
| linux · Debian 14 | 6.0.10-1 | DEBIAN-CVE-2022-49776 | May 1, 2025 |
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