CVE-2025-39926
- Source
- https://cve.org/CVERecord?id=CVE-2025-39926
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-39926.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-39926
- Downstream
- Related
- Published
- 2025-10-01T08:07:13.883Z
- Modified
- 2026-03-20T12:43:06.671055Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- genetlink: fix genl_bind() invoking bind() after -EPERM
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
genetlink: fix genl_bind() invoking bind() after -EPERM
Per family bind/unbind callbacks were introduced to allow families to track multicast group consumer presence, e.g. to start or stop producing events depending on listeners.
However, in genl_bind() the bind() callback was invoked even if capability checks failed and ret was set to -EPERM. This means that callbacks could run on behalf of unauthorized callers while the syscall still returned failure to user space.
Fix this by only invoking bind() after "if (ret) break;" check i.e. after permission checks have succeeded.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39926.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/1dbfb0363224f6da56f6655d596dc5097308d6f5
- https://git.kernel.org/stable/c/8858c1e9405906c09589d7c336f04058ea198207
- https://git.kernel.org/stable/c/98c9d884047a3051c203708914a874dece3cbe54
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39926.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-39926
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git