CVE-2024-26910: netfilter: ipset: fix performance regression in swap operation
First published: Wed Apr 17 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <5.4.269 | |
| Linux Kernel | >=5.5<5.10.210 | |
| Linux Kernel | >=5.11<5.15.149 | |
| Linux Kernel | >=5.16<6.1.79 | |
| Linux Kernel | >=6.2<6.6.18 | |
| Linux Kernel | >=6.7<6.7.6 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.11-1 6.12.12-1 |
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Reference Links
- https://git.kernel.org/stable/c/653bc5e6d9995d7d5f497c665b321875a626161c
- https://git.kernel.org/stable/c/970709a67696b100a57b33af1a3d75fc34b747eb
- https://git.kernel.org/stable/c/97f7cf1cd80eeed3b7c808b7c12463295c751001
- https://git.kernel.org/stable/c/a24d5f2ac8ef702a58e55ec276aad29b4bd97e05
- https://git.kernel.org/stable/c/b93a6756a01f4fd2f329a39216f9824c56a66397
- https://git.kernel.org/stable/c/c2dc077d8f722a1c73a24e674f925602ee5ece49
- https://git.kernel.org/stable/c/c7f2733e5011bfd136f1ca93497394d43aa76225
- https://launchpad.net/bugs/cve/CVE-2024-26910
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26910
- https://nvd.nist.gov/vuln/detail/CVE-2024-26910
- https://security-tracker.debian.org/tracker/CVE-2024-26910
- https://ubuntu.com/security/CVE-2024-26910
- https://git.kernel.org/linus/97f7cf1cd80eeed3b7c808b7c12463295c751001
Frequently Asked Questions
What is the severity of CVE-2024-26910?
CVE-2024-26910 has been classified as a performance regression issue affecting the netfilter ipset.
How do I fix CVE-2024-26910?
To resolve CVE-2024-26910, update your Linux kernel to one of the fixed versions, such as 5.10.223-1 or higher.
Which Linux kernel versions are affected by CVE-2024-26910?
CVE-2024-26910 affects various versions of the Linux kernel, including versions prior to 5.10.223 and various ranges up to 6.7.
What types of systems are vulnerable to CVE-2024-26910?
Systems running vulnerable versions of the Linux kernel using the netfilter ipset feature are susceptible to CVE-2024-26910.
What is the nature of CVE-2024-26910?
CVE-2024-26910 represents a race condition in the swap operation of the ipset, which can impact system performance.
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