ALPINE-CVE-2026-34743
XZ Utils provide a general-purpose data-compression library plus command-line tools. Prior to version 5.8.3, if lzma_index_decoder() was used to decode an Index that contained no Records, the resulting lzma_index was left in a state where where a subsequent lzma_index_append() would allocate too little memory, and a buffer overflow would occur. This issue has been patched in version 5.8.3.
ALPINE-CVE-2026-34743
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:ALPINE-CVE-2026-34743
xz
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 5.8.3-r0
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
xz
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 5.8.3-r0
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
xz
Source reference: /affected/2/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 5.8.3-r0
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
xz
Source reference: /affected/3/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 5.8.3-r0
Source reference:
/affected/3/ranges - Prerequisites
- Not stated in this record
xz
Source reference: /affected/4/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 5.8.3-r0
Source reference:
/affected/4/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.8.3-r0"
}
]
}
],
"package": {
"name": "xz",
"purl": "pkg:apk/alpine/xz?arch=source",
"ecosystem": "Alpine:v3.20"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-34743.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.8.3-r0"
}
]
}
],
"package": {
"name": "xz",
"purl": "pkg:apk/alpine/xz?arch=source",
"ecosystem": "Alpine:v3.21"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-34743.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.8.3-r0"
}
]
}
],
"package": {
"name": "xz",
"purl": "pkg:apk/alpine/xz?arch=source",
"ecosystem": "Alpine:v3.22"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-34743.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.8.3-r0"
}
]
}
],
"package": {
"name": "xz",
"purl": "pkg:apk/alpine/xz?arch=source",
"ecosystem": "Alpine:v3.23"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-34743.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.8.3-r0"
}
]
}
],
"package": {
"name": "xz",
"purl": "pkg:apk/alpine/xz?arch=source",
"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-34743.json"
},
"ecosystem_specific": {}
}
]Publisher severity
No explicit severity was provided.
- Event
- #54304 · Revision 1
- Added to Heist Feed
- Publisher date