UBUNTU-CVE-2024-26910
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.
02 / AFFECTED SOFTWARE
Affected packages
77 explicit affected versions
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88 explicit affected versions
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42 explicit affected versions
37 explicit affected versions
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37 explicit affected versions
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77 explicit affected versions
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10 explicit affected versions
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10 explicit affected versions
13 explicit affected versions
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41 explicit affected versions
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12 explicit affected versions
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1 explicit affected versions
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89 explicit affected versions
27 explicit affected versions
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37 explicit affected versions
18 explicit affected versions
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26 explicit affected versions
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33 explicit affected versions
16 explicit affected versions
42 explicit affected versions
9 explicit affected versions
12 explicit affected versions
47 explicit affected versions
13 explicit affected versions
78 explicit affected versions
7 explicit affected versions
73 explicit affected versions
39 explicit affected versions
66 explicit affected versions
89 explicit affected versions
7 explicit affected versions
10 explicit affected versions
11 explicit affected versions
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31 explicit affected versions
18 explicit affected versions
3 explicit affected versions
16 explicit affected versions
36 explicit affected versions
36 explicit affected versions
57 explicit affected versions
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23 explicit affected versions
11 explicit affected versions
30 explicit affected versions
36 explicit affected versions
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35 explicit affected versions
12 explicit affected versions
6 explicit affected versions
12 explicit affected versions
44 explicit affected versions
50 explicit affected versions
12 explicit affected versions
9 explicit affected versions
74 explicit affected versions
27 explicit affected versions
12 explicit affected versions
85 explicit affected versions
7 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/97f7cf1cd80eeed3b7c808b7c12463295c751001
- 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://ubuntu.com/security/CVE-2024-26910
- https://ubuntu.com/security/notices/USN-6766-1
- https://ubuntu.com/security/notices/USN-6766-2
- https://ubuntu.com/security/notices/USN-6766-3
- https://ubuntu.com/security/notices/USN-6767-1
- https://ubuntu.com/security/notices/USN-6767-2
- https://ubuntu.com/security/notices/USN-6795-1
- https://ubuntu.com/security/notices/USN-6828-1
- https://ubuntu.com/security/notices/USN-6895-1
- https://ubuntu.com/security/notices/USN-6895-2
- https://ubuntu.com/security/notices/USN-6895-3
- https://ubuntu.com/security/notices/USN-6895-4
- https://ubuntu.com/security/notices/USN-6900-1
- https://www.cve.org/CVERecord?id=CVE-2024-26910