CVE-2025-39926
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
01/10/2025
Last modified:
14/01/2026
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
genetlink: fix genl_bind() invoking bind() after -EPERM<br />
<br />
Per family bind/unbind callbacks were introduced to allow families<br />
to track multicast group consumer presence, e.g. to start or stop<br />
producing events depending on listeners.<br />
<br />
However, in genl_bind() the bind() callback was invoked even if<br />
capability checks failed and ret was set to -EPERM. This means that<br />
callbacks could run on behalf of unauthorized callers while the<br />
syscall still returned failure to user space.<br />
<br />
Fix this by only invoking bind() after "if (ret) break;" check<br />
i.e. after permission checks have succeeded.
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:*:*:*:*:*:*:*:* | 6.9 (including) | 6.12.48 (excluding) |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.13 (including) | 6.16.8 (excluding) |
| cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page