CVE-2022-49776
macvlan: enforce a consistent minimal mtu
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ 91572088e3fdbf4fe31cf397926d8b890fdb3237; < d2fee7d121d189c6dc905b727d60e7043a6655bb (affected, git) ≥ 91572088e3fdbf4fe31cf397926d8b890fdb3237; < 650137a7c0b2892df2e5b0bc112d7b09a78c93c8 (affected, git) ≥ 91572088e3fdbf4fe31cf397926d8b890fdb3237; < a62aa84fe19eb24d083d600a074c009a0a66d4f3 (affected, git) ≥ 91572088e3fdbf4fe31cf397926d8b890fdb3237; < e929ec98c0c3b10d9c07f3776df0c1a02d7a763e (affected, git) ≥ 91572088e3fdbf4fe31cf397926d8b890fdb3237; < e41cbf98df22d08402e65174d147cbb187fe1a33 (affected, git) ≥ 91572088e3fdbf4fe31cf397926d8b890fdb3237; < 2b055c719d8f94c15ec9b7659978133030c6a353 (affected, git) ≥ 91572088e3fdbf4fe31cf397926d8b890fdb3237; < b64085b00044bdf3cd1c9825e9ef5b2e0feae91a (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
4.10 (affected) ≥ 0; < 4.10 (unaffected, semver) ≥ 4.14.300; ≤ 4.14.* (unaffected, semver) ≥ 4.19.267; ≤ 4.19.* (unaffected, semver) ≥ 5.4.225; ≤ 5.4.* (unaffected, semver) ≥ 5.10.156; ≤ 5.10.* (unaffected, semver) ≥ 5.15.80; ≤ 5.15.* (unaffected, semver) ≥ 6.0.10; ≤ 6.0.* (unaffected, semver) ≥ 6.1; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/d2fee7d121d189c6dc905b727d60e7043a6655bbCNA: Linux
- https://git.kernel.org/stable/c/650137a7c0b2892df2e5b0bc112d7b09a78c93c8CNA: Linux
- https://git.kernel.org/stable/c/a62aa84fe19eb24d083d600a074c009a0a66d4f3CNA: Linux
- https://git.kernel.org/stable/c/e929ec98c0c3b10d9c07f3776df0c1a02d7a763eCNA: Linux
- https://git.kernel.org/stable/c/e41cbf98df22d08402e65174d147cbb187fe1a33CNA: Linux
- https://git.kernel.org/stable/c/2b055c719d8f94c15ec9b7659978133030c6a353CNA: Linux
- https://git.kernel.org/stable/c/b64085b00044bdf3cd1c9825e9ef5b2e0feae91aCNA: Linux
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