CVEvulnerability
CVE-2026-97901
- Status
- Received
- Published
- 2026-09-25
- Last modified
- 2026-10-21
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
In the Linux kernel, the following vulnerability has been resolved:
genetlink: pin family module during policy dump
The generic netlink controller's policy dump keeps pointers to the target
family's operation and policy tables in its callback state. A dump may be
split across multiple skbs and remain pending after the initial request.
Netlink pins the module which owns the dump callback, but in this case
that is the controller's owner rather than the target family's owner. The
target family can consequently be unregistered and its module unloaded
while a policy dump is pending. Advancing the dump then dereferences
policy memory from the unloaded module.
Take a reference to the target family's module when the dump starts.
Drop it from the error and done paths. This matches the lifetime for which
the dump context retains the family and policy pointers.
References
- https://git.kernel.org/stable/c/1a345d95e59a99e25404138b5a1ec2edcb03269f git.kernel.org
- https://git.kernel.org/stable/c/508387ad95ef9c13aa6431678c39763e882da2dc git.kernel.org
- https://git.kernel.org/stable/c/6a1094c34d176827b2b173e163dcc964a13af93f git.kernel.org
- https://git.kernel.org/stable/c/6d8e653fcf1c90310797eeba8e5fafe9ccc3de9e git.kernel.org
- https://git.kernel.org/stable/c/6e4d746e55c83c240cffce92356763d16b236af5 git.kernel.org