In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: fix performance regression in swap operation The patch "netfilter: ipset: fix race condition between swap/destroy and kernel side add/del/test", commit 28628fa9 fixes a race condition. But the synchronize_rcu() added to the swap function unnecessarily slows it down: it can safely be moved to destroy and use call_rcu() instead. Eric Dumazet pointed out that simply calling the destroy functions as rcu callback does not work: sets with timeout use garbage collectors which need cancelling at destroy which can wait. Therefore the destroy functions are split into two: cancelling garbage collectors safely at executing the command received by netlink and moving the remaining part only into the rcu callback.
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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-04-17T15:59:21.967Z

Updated: 2024-08-02T00:21:05.455Z

Reserved: 2024-02-19T14:20:24.188Z

Link: CVE-2024-26910

cve-icon Vulnrichment

Updated: 2024-05-23T19:01:23.955Z

cve-icon NVD

Status : Modified

Published: 2024-04-17T16:15:07.860

Modified: 2024-06-25T22:15:26.080

Link: CVE-2024-26910

cve-icon Redhat

Severity : Moderate

Publid Date: 2024-04-17T00:00:00Z

Links: CVE-2024-26910 - Bugzilla