Updated: 2026-02-27 01:33:59.893413
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.
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | 0.0 | |
| CVSS Version 3.x | MEDIUM | 5.5 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
|---|---|---|---|---|---|---|---|---|
| AlmaLinux 9.2 ESU | kernel | 5.14.0 | 5.5 | MEDIUM | Ignored | 2025-09-10 14:24:24 | This issue is a local-only NULL pointer dereference in the virtio-vsock transport that requires a gu... | |
| TuxCare 9.6 ESU | kernel | 5.14.0 | 5.5 | MEDIUM | Ignored | 2025-07-05 02:18:13 | This bug is confined to the virtio-vsock path and requires a local process with low privileges to pe... |