ALPINE-CVE-2026-34743

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Source
https://security.alpinelinux.org/vuln/CVE-2026-34743
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2026-34743.json
JSON Data
https://api.test.osv.dev/v1/vulns/ALPINE-CVE-2026-34743
Upstream
Published
2026-04-02T19:21:33.187Z
Modified
2026-04-29T06:33:53.540237Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
[none]
Details

XZ Utils provide a general-purpose data-compression library plus command-line tools. Prior to version 5.8.3, if lzmaindexdecoder() was used to decode an Index that contained no Records, the resulting lzmaindex was left in a state where where a subsequent lzmaindex_append() would allocate too little memory, and a buffer overflow would occur. This issue has been patched in version 5.8.3.

References

Affected packages

Alpine:v3.20 / xz

Package

Name
xz
Purl
pkg:apk/alpine/xz?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.8.3-r0

Affected versions

5.*
5.0.0-r0
5.0.1-r0
5.0.2-r0
5.0.3-r0
5.0.3-r1
5.0.4-r0
5.0.4-r1
5.0.5-r0
5.0.6-r0
5.0.7-r0
5.2.0-r0
5.2.1-r0
5.2.2-r0
5.2.2-r1
5.2.3-r0
5.2.3-r1
5.2.4-r0
5.2.5-r0
5.2.5-r1
5.2.6-r0
5.2.6-r1
5.2.7-r0
5.2.8-r0
5.2.9-r0
5.4.0-r0
5.4.0-r1
5.4.1-r0
5.4.2-r0
5.4.2-r1
5.4.3-r0
5.4.3-r1
5.4.4-r0
5.4.5-r0
5.4.6-r0
5.6.1-r0
5.6.1-r1
5.6.1-r2
5.6.1-r3
5.6.2-r0
5.6.2-r1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2026-34743.json"

Alpine:v3.21 / xz

Package

Name
xz
Purl
pkg:apk/alpine/xz?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.8.3-r0

Affected versions

5.*
5.0.0-r0
5.0.1-r0
5.0.2-r0
5.0.3-r0
5.0.3-r1
5.0.4-r0
5.0.4-r1
5.0.5-r0
5.0.6-r0
5.0.7-r0
5.2.0-r0
5.2.1-r0
5.2.2-r0
5.2.2-r1
5.2.3-r0
5.2.3-r1
5.2.4-r0
5.2.5-r0
5.2.5-r1
5.2.6-r0
5.2.6-r1
5.2.7-r0
5.2.8-r0
5.2.9-r0
5.4.0-r0
5.4.0-r1
5.4.1-r0
5.4.2-r0
5.4.2-r1
5.4.3-r0
5.4.3-r1
5.4.4-r0
5.4.5-r0
5.4.6-r0
5.6.1-r0
5.6.1-r1
5.6.1-r2
5.6.1-r3
5.6.2-r0
5.6.3-r0
5.6.3-r1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2026-34743.json"

Alpine:v3.22 / xz

Package

Name
xz
Purl
pkg:apk/alpine/xz?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.8.3-r0

Affected versions

5.*
5.0.0-r0
5.0.1-r0
5.0.2-r0
5.0.3-r0
5.0.3-r1
5.0.4-r0
5.0.4-r1
5.0.5-r0
5.0.6-r0
5.0.7-r0
5.2.0-r0
5.2.1-r0
5.2.2-r0
5.2.2-r1
5.2.3-r0
5.2.3-r1
5.2.4-r0
5.2.5-r0
5.2.5-r1
5.2.6-r0
5.2.6-r1
5.2.7-r0
5.2.8-r0
5.2.9-r0
5.4.0-r0
5.4.0-r1
5.4.1-r0
5.4.2-r0
5.4.2-r1
5.4.3-r0
5.4.3-r1
5.4.4-r0
5.4.5-r0
5.4.6-r0
5.6.1-r0
5.6.1-r1
5.6.1-r2
5.6.1-r3
5.6.2-r0
5.6.3-r0
5.6.4-r0
5.8.0-r0
5.8.1-r0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2026-34743.json"

Alpine:v3.23 / xz

Package

Name
xz
Purl
pkg:apk/alpine/xz?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.8.3-r0

Affected versions

5.*
5.0.0-r0
5.0.1-r0
5.0.2-r0
5.0.3-r0
5.0.3-r1
5.0.4-r0
5.0.4-r1
5.0.5-r0
5.0.6-r0
5.0.7-r0
5.2.0-r0
5.2.1-r0
5.2.2-r0
5.2.2-r1
5.2.3-r0
5.2.3-r1
5.2.4-r0
5.2.5-r0
5.2.5-r1
5.2.6-r0
5.2.6-r1
5.2.7-r0
5.2.8-r0
5.2.9-r0
5.4.0-r0
5.4.0-r1
5.4.1-r0
5.4.2-r0
5.4.2-r1
5.4.3-r0
5.4.3-r1
5.4.4-r0
5.4.5-r0
5.4.6-r0
5.6.1-r0
5.6.1-r1
5.6.1-r2
5.6.1-r3
5.6.2-r0
5.6.3-r0
5.6.4-r0
5.8.0-r0
5.8.1-r0
5.8.2-r0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2026-34743.json"