UnratedFix available
ipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down()
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down() As discussed in the past (commit 2d3916f31891 ("ipv6: fix skb drops in igmp6_event_query() and igmp6_event_report()")) I think the synchronize_net() call in ipv6_mc_down() is not needed. Under load, synchronize_net() can last between 200 usec and 5 ms. KASAN seems to agree as well.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.15.153, 6.1.83, 6.6.23, 6.7.11, 6.8.2
- CVEs
- CVE-2024-27390
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 16:16 UTC · Revision 1
Source evidence
ipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down()
core-osv · Original sourcePublished 1 May 2024, 13:05 UTC
In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down() As discussed in the past (commit 2d3916f31891 ("ipv6: fix skb drops in igmp6_event_query() and igmp6_event_report()")) I think the synchronize_net() call in ipv6_mc_down() is not needed. Under load, synchronize_net() can last between 200 usec and 5 ms. KASAN seems to agree as well.
osv:CVE-2024-27390
Kernel
Fixed versions: 5.15.153, 6.1.83, 6.6.23, 6.7.11, 6.8.2
Complete source record
{
"id": "1f0f2c5ce7a4166a822f9d5ffac84016dfebeca7fcb563fe7b83c538bf92f57d",
"url": "https://osv.dev/vulnerability/CVE-2024-27390",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down()",
"summary": "In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down() As discussed in the past (commit 2d3916f31891 (\"ipv6: fix skb drops in igmp6_event_query() and igmp6_event_report()\")) I think the synchronize_net() call in ipv6_mc_down() is not needed. Under load, synchronize_net() can last between 200 usec and 5 ms. KASAN seems to agree as well.",
"evidence": "osv:CVE-2024-27390",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
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"value": "5.15.153",
"evidence": "/affected/1/ranges"
},
{
"value": "6.1.83",
"evidence": "/affected/1/ranges"
},
{
"value": "6.6.23",
"evidence": "/affected/1/ranges"
},
{
"value": "6.7.11",
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{
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"evidence": "/affected/1/ranges"
}
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"affected_versions": []
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"severity": "unknown",
"structured": {
"id": "CVE-2024-27390",
"aliases": [
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"affected": [
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},
{
"ranges": [
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{
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{
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{
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"events": [
{
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{
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{
"fixed": "6.8.2"
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],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-27390.json"
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],
"modified": "2026-10-28T02:30:37.377579853Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/17ef8efc00b34918b966388b2af0993811895a8c",
"https://git.kernel.org/stable/c/26d4bac55750d535f1f0b8790dc26daf6089e373",
"https://git.kernel.org/stable/c/5da9a218340a2bc804dc4327e5804392e24a0b88",
"https://git.kernel.org/stable/c/7eb06ee5921189812e6b4bfe7b0f1e878be16df7",
"https://git.kernel.org/stable/c/9d159d6637ccce25f879d662a480541ef4ba3a50",
"https://git.kernel.org/stable/c/a03ede2282ebbd181bd6f5c38cbfcb5765afcd04",
"https://git.kernel.org/stable/c/bfd2f3c58ad86ad33db80515e6c3503e0414e44b",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/27xxx/CVE-2024-27390.json",
"https://nvd.nist.gov/vuln/detail/CVE-2024-27390",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/27xxx/CVE-2024-27390.json"
}
},
"related_cves": [
{
"value": "CVE-2024-27390",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 504545,
"published_at": "2024-05-01T13:05:12.775+00:00"
}