ghsa-4p7x-7wc6-4gf5
Vulnerability from github
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": [],
"aliases": [
"CVE-2024-26910"
],
"database_specific": {
"cwe_ids": [
"CWE-362"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-04-17T16:15:07Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ipset: fix performance regression in swap operation\n\nThe patch \"netfilter: ipset: fix race condition between swap/destroy\nand kernel side add/del/test\", commit 28628fa9 fixes a race condition.\nBut the synchronize_rcu() added to the swap function unnecessarily slows\nit down: it can safely be moved to destroy and use call_rcu() instead.\n\nEric Dumazet pointed out that simply calling the destroy functions as\nrcu callback does not work: sets with timeout use garbage collectors\nwhich need cancelling at destroy which can wait. Therefore the destroy\nfunctions are split into two: cancelling garbage collectors safely at\nexecuting the command received by netlink and moving the remaining\npart only into the rcu callback.",
"id": "GHSA-4p7x-7wc6-4gf5",
"modified": "2024-06-26T00:31:38Z",
"published": "2024-04-17T18:31:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26910"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/653bc5e6d9995d7d5f497c665b321875a626161c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/970709a67696b100a57b33af1a3d75fc34b747eb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/97f7cf1cd80eeed3b7c808b7c12463295c751001"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a24d5f2ac8ef702a58e55ec276aad29b4bd97e05"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b93a6756a01f4fd2f329a39216f9824c56a66397"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c2dc077d8f722a1c73a24e674f925602ee5ece49"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c7f2733e5011bfd136f1ca93497394d43aa76225"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.