Race Condition Affecting linux-5.10 package, versions <5.10.216-1~deb10u1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.18% (8th percentile)

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  • Snyk IDSNYK-DEBIAN10-LINUX510-7371047
  • published26 Jun 2024
  • disclosed17 Apr 2024

Introduced: 17 Apr 2024

CVE-2024-26910  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade Debian:10 linux-5.10 to version 5.10.216-1~deb10u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-5.10 package and not the linux-5.10 package as distributed by Debian. See How to fix? for Debian:10 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1