CVE-Katalog
CVE-2026-54522
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 s
- Schweregrad
- Low · CVSS 2.1
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.23% · Oct 22, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | ruby-msgpack | sid | 1.8.5-1 | fixed |
| Debian | ruby-msgpack | forky | 1.8.5-1 | fixed |
| Debian | ruby-msgpack | trixie | 1.7.2-1.1 | vulnerable |
| Debian | ruby-msgpack | bookworm | 1.4.2-2 | vulnerable |
| Rubygems | msgpack | Not reported | 1.8.2 | fixed |
| Ubuntu | ruby-msgpack | 16.04 | 0.6.2-1build1 | vulnerable |
| Ubuntu | ruby-msgpack | 16.04 | 0.6.2-1build2 | vulnerable |
| Ubuntu | ruby-msgpack | 16.04 | 0.6.2-1build3 | vulnerable |
| Ubuntu | ruby-msgpack | 16.04 | 0.6.2-1build4 | vulnerable |
| Ubuntu | ruby-msgpack | 18.04 | 1.0.0-1 | vulnerable |
| Ubuntu | ruby-msgpack | 18.04 | 1.1.0-1 | vulnerable |
| Ubuntu | ruby-msgpack | 18.04 | 1.1.0-1build1 | vulnerable |
| Ubuntu | ruby-msgpack | 18.04 | 1.1.0-1build2 | vulnerable |
| Ubuntu | ruby-msgpack | 20.04 | 1.1.0-1build2 | vulnerable |
| Ubuntu | ruby-msgpack | 20.04 | 1.1.0-1build3 | vulnerable |
| Ubuntu | ruby-msgpack | 22.04 | 1.1.0-2build1 | vulnerable |
| Ubuntu | ruby-msgpack | 22.04 | 1.1.0-2build2 | vulnerable |
| Ubuntu | ruby-msgpack | 22.04 | 1.4.2-2 | vulnerable |
| Ubuntu | ruby-msgpack | 24.04 | 1.4.2-2build2 | vulnerable |
| Ubuntu | ruby-msgpack | 24.04 | 1.4.2-2build3 | vulnerable |
| Ubuntu | ruby-msgpack | 24.04 | 1.4.2-2build4 | vulnerable |
| Ubuntu | ruby-msgpack | 26.04 | 1.7.2-1.1 | vulnerable |
| Ubuntu | ruby-msgpack | 26.04 | 1.8.0-1 | vulnerable |
| Cpe | messagepack | Not reported | 1.8.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | ruby-msgpack | source | sid | 1.8.3-1 | not yet assigned | Not reported | Not reported |
| Debian | ruby-msgpack | source | forky | 1.8.3-1 | not yet assigned | Not reported | Not reported |
| Debian | ruby-msgpack | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | ruby-msgpack | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Rubygems | msgpack | rubygems | Not reported | 1.8.2 | Not reported | Not reported | Not reported |
| Cpe | messagepack | cpe | Not reported | 1.8.2 | Not reported | NVD-CVE-2026-54522 | Not reported |
Notes
[trixie] ruby-msgpack: Minor issue [bookworm] ruby-msgpack: minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [ruby-msgpack]Betroffen
Quellpaket: [ruby-msgpack]
Details (2)
1.4.2-2+b4· amd64 · bookwormBetroffen
nvd · ruby-msgpack · debian · bookworm; nvd · ruby-msgpack · debian · 12
1.4.2-2+b4· arm64 · bookwormBetroffen
nvd · ruby-msgpack · debian · bookworm; nvd · ruby-msgpack · debian · 12
[Debian 13 (Trixie)]
- [ruby-msgpack]Betroffen
Quellpaket: [ruby-msgpack]
Details (2)
1.7.2-1.1+b2· amd64 · trixieBetroffen
nvd · ruby-msgpack · debian · 13
1.7.2-1.1+b2· arm64 · trixieBetroffen
nvd · ruby-msgpack · debian · 13
Beobachtet:
Referenzen
- [https://github.com/advisories/GHSA-4mrv-5p47-p938]
- [https://github.com/msgpack/msgpack-ruby/commit/5627d71606b565641d2dd501b82aae862f4abe90]
- [https://github.com/msgpack/msgpack-ruby/security/advisories/GHSA-4mrv-5p47-p938]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-54522]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-54522]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-54522]
- [https://security-tracker.debian.org/tracker/CVE-2026-54522]
[Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]