IT

Tracker / CVE-2024-26910

CVE-2024-26910

Medium 4.7

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.

Affected products and versions

linux linux_kernel · … → 5.4.269
linux linux_kernel · 5.11 → 5.15.149
linux linux_kernel · 5.16 → 6.1.79
linux linux_kernel · 5.5 → 5.10.210
linux linux_kernel · 6.2 → 6.6.18
linux linux_kernel · 6.7 → 6.7.6

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References