HighFix available
ext4: avoid cycles in directory h-tree
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: ext4: avoid cycles in directory h-tree A maliciously corrupted filesystem can contain cycles in the h-tree stored inside a directory. That can easily lead to the kernel corrupting tree nodes that were already verified under its hands while doing a node split and consequently accessing unallocated memory. Fix the problem by verifying traversed block numbers are unique.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 4.14.283, 4.19.247, 5.10.121, 5.15.46, 5.17.14, 5.18.3, 5.4.198
- CVEs
- CVE-2022-49343
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 15:44 UTC · Revision 1
Source evidence
In the Linux kernel, the following vulnerability has been resolved: ext4: avoid cycles in directory h-tree A maliciously corrupted filesystem can contain cycles in the h-tree stored inside a directory. That can easily lead to the kernel corrupting tree nodes that were already verified under its hands while doing a node split and consequently accessing unallocated memory. Fix the problem by verifying traversed block numbers are unique.
osv:CVE-2022-49343
Kernel
Fixed versions: 4.14.283, 4.19.247, 5.4.198, 5.10.121, 5.15.46, 5.17.14, 5.18.3
Complete source record
{
"id": "8ae8818fc3c3af05ba5e0c3f9915dd32882a0f96404c14b057af2f9a830209b5",
"url": "https://osv.dev/vulnerability/CVE-2022-49343",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ext4: avoid cycles in directory h-tree",
"summary": "In the Linux kernel, the following vulnerability has been resolved: ext4: avoid cycles in directory h-tree A maliciously corrupted filesystem can contain cycles in the h-tree stored inside a directory. That can easily lead to the kernel corrupting tree nodes that were already verified under its hands while doing a node split and consequently accessing unallocated memory. Fix the problem by verifying traversed block numbers are unique.",
"evidence": "osv:CVE-2022-49343",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.14.283",
"evidence": "/affected/1/ranges"
},
{
"value": "4.19.247",
"evidence": "/affected/1/ranges"
},
{
"value": "5.4.198",
"evidence": "/affected/1/ranges"
},
{
"value": "5.10.121",
"evidence": "/affected/1/ranges"
},
{
"value": "5.15.46",
"evidence": "/affected/1/ranges"
},
{
"value": "5.17.14",
"evidence": "/affected/1/ranges"
},
{
"value": "5.18.3",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "CVE-2022-49343",
"aliases": [
"CVE-2022-49343"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
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{
"fixed": "6084240bfc44bf265ab6ae7d96980469b05be0f1"
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{
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"modified": "2026-10-28T02:30:30.326705078Z",
"provider": "osv",
"references": [
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"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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"related_cves": [
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"value": "CVE-2022-49343",
"evidence": "/id"
}
],
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"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 496949,
"published_at": "2025-02-26T02:10:59.97+00:00"
}