Uncontrolled Recursion Affecting rv package, versions *
Threat Intelligence
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Test your applications- Snyk IDSNYK-CENTOS9-RV-14714089
- published26 Dec 2025
- disclosed24 Dec 2025
Introduced: 24 Dec 2025
NewCVE-2023-54012 (opens in a new tab)How to fix?
There is no fixed version for Centos:9 rv.
NVD Description
Note: Versions mentioned in the description apply only to the upstream rv package and not the rv package as distributed by Centos.
See How to fix? for Centos:9 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
net: fix stack overflow when LRO is disabled for virtual interfaces
When the virtual interface's feature is updated, it synchronizes the updated feature for its own lower interface. This propagation logic should be worked as the iteration, not recursively. But it works recursively due to the netdev notification unexpectedly. This problem occurs when it disables LRO only for the team and bonding interface type.
team0
|
+------+------+-----+-----+ | | | | | team1 team2 team3 ... team200
If team0's LRO feature is updated, it generates the NETDEV_FEAT_CHANGE event to its own lower interfaces(team1 ~ team200). It is worked by netdev_sync_lower_features(). So, the NETDEV_FEAT_CHANGE notification logic of each lower interface work iteratively. But generated NETDEV_FEAT_CHANGE event is also sent to the upper interface too. upper interface(team0) generates the NETDEV_FEAT_CHANGE event for its own lower interfaces again. lower and upper interfaces receive this event and generate this event again and again. So, the stack overflow occurs.
But it is not the infinite loop issue. Because the netdev_sync_lower_features() updates features before generating the NETDEV_FEAT_CHANGE event. Already synchronized lower interfaces skip notification logic. So, it is just the problem that iteration logic is changed to the recursive unexpectedly due to the notification mechanism.
Reproducer:
ip link add team0 type team ethtool -K team0 lro on for i in {1..200} do ip link add team$i master team0 type team ethtool -K team$i lro on done
ethtool -K team0 lro off
In order to fix it, the notifier_ctx member of bonding/team is introduced.
References
- https://access.redhat.com/security/cve/CVE-2023-54012
- https://git.kernel.org/stable/c/4bb955c4d2830a58c08e2a48ab75d75368e3ff36
- https://git.kernel.org/stable/c/6bf00bb3dc7e5b9fb05488e11616e65d64e975fa
- https://git.kernel.org/stable/c/9ea0c5f90a27b5b884d880e146e0f65f3052e401
- https://git.kernel.org/stable/c/ae9b15fbe63447bc1d3bba3769f409d17ca6fdf6
- https://git.kernel.org/stable/c/cf3b5cd7127cc10c5b12400c545f263f0e5e715c
- https://git.kernel.org/stable/c/ed66e6327a69fec95034cda2ac5b6a57b8b3b622