CVE-2026-54522

Published: Lug 30, 2026 Last Modified: Lug 30, 2026
ExploitDB:
Other exploit source:
Google Dorks:
LOW 2,1
Source: [email protected]
Attack Vector: local
Attack Complexity: low
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0012
Percentile
0,0th
Updated

EPSS Score Trend (Last 2 Days)

416

Use After Free

Stable
Abstraction: Variant Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Availability Confidentiality
Potential Impacts:
Modify Memory Dos: Crash, Exit, Or Restart Read Memory Execute Unauthorized Code Or Commands
Applicable Platforms
Languages: Memory-Unsafe, C, C++
Likelihood of Exploit: High
View CWE Details
https://github.com/msgpack/msgpack-ruby/security/advisories…
https://github.com/msgpack/msgpack-ruby/security/advisories/GHSA-4mrv-5p47-p938
https://github.com/msgpack/msgpack-ruby/commit/5627d71606b5…
https://github.com/msgpack/msgpack-ruby/commit/5627d71606b565641d2dd501b82aae86…
https://github.com/msgpack/msgpack-ruby/security/advisories…
https://github.com/msgpack/msgpack-ruby/security/advisories/GHSA-4mrv-5p47-p938