CVE-2025-21669
High
Description
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: discard packets if the transport changes If the socket has been de-assigned or assigned to another transport, we must discard any packets received because they are not expected and would cause issues when we access vsk->transport. A possible scenario is described by Hyunwoo Kim in the attached link, where after a first connect() interrupted by a signal, and a second connect() failed, we can find `vsk->transport` at NULL, leading to a NULL pointer dereference.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedJan 31, 2025
First seenJan 31, 2025
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- linux linux_kernel5.15.177, 6.1.127, 6.6.74, 6.12.11 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.5 ≤ v < 5.15.177, 5.16 ≤ v < 6.1.127, 6.2 ≤ v < 6.6.74, 6.7 ≤ v < 6.12.11, 6.13 | 5.15.177, 6.1.127, 6.6.74, 6.12.11 |
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