vulnerability
Oracle Linux: CVE-2025-39926: ELSA-2025-25754: Unbreakable Enterprise kernel security update (IMPORTANT)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:S/C:N/I:N/A:C) | Oct 1, 2025 | Nov 11, 2025 | Nov 11, 2025 |
Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
Oct 1, 2025
Added
Nov 11, 2025
Modified
Nov 11, 2025
Description
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.
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.
Solution
oracle-linux-upgrade-kernel-uek
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