CVE-2022-49776
macvlan: enforce a consistent minimal mtu
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
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.
Timeline
ID reserved
By Linux
- 15 days later
· 15 days later
Published
- 18 months later
· 18 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.22% · top 88% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 91572088e3fdbf4fe31cf397926d8b890fdb3237 – < d2fee7d121d189c6dc905b727d60e7043a6655bb
- affected 91572088e3fdbf4fe31cf397926d8b890fdb3237 – < 650137a7c0b2892df2e5b0bc112d7b09a78c93c8
- affected 91572088e3fdbf4fe31cf397926d8b890fdb3237 – < a62aa84fe19eb24d083d600a074c009a0a66d4f3
- affected 91572088e3fdbf4fe31cf397926d8b890fdb3237 – < e929ec98c0c3b10d9c07f3776df0c1a02d7a763e
- affected 91572088e3fdbf4fe31cf397926d8b890fdb3237 – < e41cbf98df22d08402e65174d147cbb187fe1a33
- affected 91572088e3fdbf4fe31cf397926d8b890fdb3237 – < 2b055c719d8f94c15ec9b7659978133030c6a353
- affected 91572088e3fdbf4fe31cf397926d8b890fdb3237 – < b64085b00044bdf3cd1c9825e9ef5b2e0feae91a
- affected 4.10
- unaffected < 4.10
- unaffected 4.14.300 – ≤ 4.14.*
- unaffected 4.19.267 – ≤ 4.19.*
- unaffected 5.4.225 – ≤ 5.4.*
- unaffected 5.10.156 – ≤ 5.10.*
- unaffected 5.15.80 – ≤ 5.15.*
- unaffected 6.0.10 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (7)
- https://git.kernel.org/stable/c/d2fee7d121d189c6dc905b727d60e7043a6655bb (opens in a new tab)
- https://git.kernel.org/stable/c/650137a7c0b2892df2e5b0bc112d7b09a78c93c8 (opens in a new tab)
- https://git.kernel.org/stable/c/a62aa84fe19eb24d083d600a074c009a0a66d4f3 (opens in a new tab)
- https://git.kernel.org/stable/c/e929ec98c0c3b10d9c07f3776df0c1a02d7a763e (opens in a new tab)
- https://git.kernel.org/stable/c/e41cbf98df22d08402e65174d147cbb187fe1a33 (opens in a new tab)
- https://git.kernel.org/stable/c/2b055c719d8f94c15ec9b7659978133030c6a353 (opens in a new tab)
- https://git.kernel.org/stable/c/b64085b00044bdf3cd1c9825e9ef5b2e0feae91a (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49776)Record last updated .