CVE-2025-21666
Severity CVSS v4.0:
Pending analysis
Type:
CWE-476
NULL Pointer Dereference
Publication date:
31/01/2025
Last modified:
03/11/2025
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
vsock: prevent null-ptr-deref in vsock_*[has_data|has_space]<br />
<br />
Recent reports have shown how we sometimes call vsock_*_has_data()<br />
when a vsock socket has been de-assigned from a transport (see attached<br />
links), but we shouldn&#39;t.<br />
<br />
Previous commits should have solved the real problems, but we may have<br />
more in the future, so to avoid null-ptr-deref, we can return 0<br />
(no space, no data available) but with a warning.<br />
<br />
This way the code should continue to run in a nearly consistent state<br />
and have a warning that allows us to debug future problems.
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:*:*:*:*:*:*:*:* | 5.5 (including) | 5.15.177 (excluding) |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.16 (including) | 6.1.127 (excluding) |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.2 (including) | 6.6.74 (excluding) |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.7 (including) | 6.12.11 (excluding) |
| cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:6.13:rc7:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page
References to Advisories, Solutions, and Tools
- https://git.kernel.org/stable/c/91751e248256efc111e52e15115840c35d85abaf
- https://git.kernel.org/stable/c/9e5fed46ccd2c34c5fa5a9c8825ce4823fdc853e
- https://git.kernel.org/stable/c/b52e50dd4fabd12944172bd486a4f4853b7f74dd
- https://git.kernel.org/stable/c/bc9c49341f9728c31fe248c5fbba32d2e81a092b
- https://git.kernel.org/stable/c/c23d1d4f8efefb72258e9cedce29de10d057f8ca
- https://git.kernel.org/stable/c/daeac89cdb03d30028186f5ff7dc26ec8fa843e7
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html



