UnratedFix available
xz: Fix of CVE-2026-34743
Type: advisorySources: OSV
- CVE-2026-34743: fix buffer overflow in lzma_index_append
- Products
- xz, xz-devel, xz-libs, xz-lzma-compat, xz-static
- Affected versions
- Not specified
- Fixed versions
- 5.2.5-8.tuxcare.els1
- CVEs
- CVE-2026-34743
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 10:38 UTC · Revision 1
Source evidence
- CVE-2026-34743: fix buffer overflow in lzma_index_append
osv:CLSA-2026-1779894244
xz
Fixed versions: 5.2.5-8.tuxcare.els1
xz-devel
Fixed versions: 5.2.5-8.tuxcare.els1
xz-libs
Fixed versions: 5.2.5-8.tuxcare.els1
xz-lzma-compat
Fixed versions: 5.2.5-8.tuxcare.els1
xz-static
Fixed versions: 5.2.5-8.tuxcare.els1
Complete source record
{
"id": "88074d1197b8acd0e0cea4332aecc375ed9bc559c48eef774248a7234e594de5",
"url": "https://osv.dev/vulnerability/CLSA-2026-1779894244",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "xz: Fix of CVE-2026-34743",
"summary": "- CVE-2026-34743: fix buffer overflow in lzma_index_append",
"evidence": "osv:CLSA-2026-1779894244",
"products": [
{
"name": {
"value": "xz",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.2.5-8.tuxcare.els1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "xz-devel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.2.5-8.tuxcare.els1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "xz-libs",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.2.5-8.tuxcare.els1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "xz-lzma-compat",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.2.5-8.tuxcare.els1",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "xz-static",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.2.5-8.tuxcare.els1",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1779894244",
"aliases": [
"CLSA-2026-1779894244"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.2.5-8.tuxcare.els1"
}
]
}
],
"package": {
"name": "xz",
"purl": "pkg:rpm/tuxcare/xz?distro=almalinux-9.2",
"ecosystem": "TuxCare:AlmaLinux:9.2"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1779894244.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.2.5-8.tuxcare.els1"
}
]
}
],
"package": {
"name": "xz-devel",
"purl": "pkg:rpm/tuxcare/xz-devel?distro=almalinux-9.2",
"ecosystem": "TuxCare:AlmaLinux:9.2"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1779894244.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.2.5-8.tuxcare.els1"
}
]
}
],
"package": {
"name": "xz-libs",
"purl": "pkg:rpm/tuxcare/xz-libs?distro=almalinux-9.2",
"ecosystem": "TuxCare:AlmaLinux:9.2"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1779894244.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.2.5-8.tuxcare.els1"
}
]
}
],
"package": {
"name": "xz-lzma-compat",
"purl": "pkg:rpm/tuxcare/xz-lzma-compat?distro=almalinux-9.2",
"ecosystem": "TuxCare:AlmaLinux:9.2"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1779894244.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.2.5-8.tuxcare.els1"
}
]
}
],
"package": {
"name": "xz-static",
"purl": "pkg:rpm/tuxcare/xz-static?distro=almalinux-9.2",
"ecosystem": "TuxCare:AlmaLinux:9.2"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1779894244.json"
}
}
],
"modified": "2026-10-26T09:30:06.874459266Z",
"provider": "osv",
"upstream": [
"CVE-2026-34743"
],
"references": [
"https://errata.tuxcare.com/els_os/almalinux9.2esu/CLSA-2026-1779894244.html"
]
},
"related_cves": [
{
"value": "CVE-2026-34743",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 446855,
"published_at": "2026-05-27T15:33:35+00:00"
}