DEBIAN-CVE-2026-54522

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Source
https://security-tracker.debian.org/tracker/CVE-2026-54522
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54522.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-54522
Upstream
Published
2026-07-30T17:16:33Z
Modified
2026-09-01T16:06:51Z
Severity
  • 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
[none]
Details

MessagePack for Ruby is an implementation of the MessagePack binary serialization format. Prior to 1.8.2, MessagePack::Buffer#clear in ext/msgpack/buffer.c leaves rmem_last, rmem_end, and rmem_owner stale after _msgpack_buffer_shift_chunk returns an rmem page to the shared pool, allowing a subsequent Buffer#write and a second MessagePack::Buffer to alias the page and disclose or corrupt cross-buffer data. This issue is fixed in version 1.8.2.

References

Affected packages

Debian:12 / ruby-msgpack

Package

Name
ruby-msgpack
Purl
pkg:deb/debian/ruby-msgpack?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.4.2-2
1.7.2-1
1.7.2-1.1
1.8.0-1
1.8.3-1
1.8.4-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54522.json"

Debian:13 / ruby-msgpack

Package

Name
ruby-msgpack
Purl
pkg:deb/debian/ruby-msgpack?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.7.2-1.1
1.8.0-1
1.8.3-1
1.8.4-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54522.json"

Debian:14 / ruby-msgpack

Package

Name
ruby-msgpack
Purl
pkg:deb/debian/ruby-msgpack?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.8.3-1

Affected versions

1.*
1.7.2-1.1
1.8.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54522.json"