CVE-2022-49654
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
26/02/2025
Last modified:
23/10/2025
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
net: dsa: qca8k: reset cpu port on MTU change<br />
<br />
It was discovered that the Documentation lacks of a fundamental detail<br />
on how to correctly change the MAX_FRAME_SIZE of the switch.<br />
<br />
In fact if the MAX_FRAME_SIZE is changed while the cpu port is on, the<br />
switch panics and cease to send any packet. This cause the mgmt ethernet<br />
system to not receive any packet (the slow fallback still works) and<br />
makes the device not reachable. To recover from this a switch reset is<br />
required.<br />
<br />
To correctly handle this, turn off the cpu ports before changing the<br />
MAX_FRAME_SIZE and turn on again after the value is applied.
Impact
Base Score 3.x
5.50
Severity 3.x
MEDIUM
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.9 (including) | 5.15.54 (excluding) |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.16 (including) | 5.18.11 (excluding) |
| cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page