CVE-2025-21669 — NULL Pointer Dereference in Linux
Severity
5.5MEDIUMNVD
OSV7.8OSV5.9
EPSS
0.0%
top 91.83%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJan 31
Latest updateJul 17
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`…
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6
Affected Packages6 packages
▶CVEListV5linux/linuxc0cfa2d8a788fcf45df5bf4070ab2474c88d543a — 18a7fc371d1dbf8deff16c2dd9292bcc73f43040+6