CVE-2023-52923

netfilter: nf_tables: adapt set backend to use GC transaction API

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: adapt set backend to use GC transaction API Use the GC transaction API to replace the old and buggy gc API and the busy mark approach. No set elements are removed from async garbage collection anymore, instead the _DEAD bit is set on so the set element is not visible from lookup path anymore. Async GC enqueues transaction work that might be aborted and retried later. rbtree and pipapo set backends does not set on the _DEAD bit from the sync GC path since this runs in control plane path where mutex is held. In this case, set elements are deactivated, removed and then released via RCU callback, sync GC never fails.

N/A

CVSS

Severity:

EPSS 0.14%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/cb4d00b563675ba8ff6ef94b077f58d816f68ba3
https://git.kernel.org/stable/c/c357648929c8dff891502349769aafb8f0452bc2
https://git.kernel.org/stable/c/146c76866795553dbc19998f36718d7986ad302b
https://git.kernel.org/stable/c/479a2cf5259347d6a1f658b0f791d27a34908e91
https://git.kernel.org/stable/c/df650d6a4bf47248261b61ef6b174d7c54034d15
https://git.kernel.org/stable/c/e4d71d6a9c7db93f7bf20c3a0f0659d63d7de681
https://git.kernel.org/stable/c/f6c383b8c31a93752a52697f8430a71dcbc46adf

Frequently Asked Questions

What is the severity of CVE-2023-52923?: CVE-2023-52923 has not yet been assigned a CVSS score.
How to fix CVE-2023-52923?: To fix CVE-2023-52923, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-52923 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2023-52923 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-52923?: CVE-2023-52923 affects Linux Linux, Linux Linux.

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