What is GHSA-v2x4-cfj4-7hfw?

GHSA-v2x4-cfj4-7hfw is a security advisory published by GitHub Security Advisories with High severity. Heap-based Buffer Overflow in the io-char library's DCMD_CHR_WAITINFO devctl() handler could...

Which CVE IDs does GHSA-v2x4-cfj4-7hfw cover?

GHSA-v2x4-cfj4-7hfw covers the following CVE IDs: CVE-2026-54436. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-v2x4-cfj4-7hfw?

GHSA-v2x4-cfj4-7hfw has a CVSS v3 base score of 7.4, published by GitHub Security Advisories.

GHSA-v2x4-cfj4-7hfwHighCVSS 7.4

Heap-based Buffer Overflow in the io-char library's DCMD_CHR_WAITINFO devctl() handler could...

Vendor

GitHub Security Advisories

Published

November 10, 2026

Last Modified

November 10, 2026

🔗 CVE IDs covered (1)

CVE-2026-54436 →

📋 Description

Heap-based Buffer Overflow in the io-char library's DCMD_CHR_WAITINFO devctl() handler could allow an attacker with local access to cause data tampering, arbitrary code execution, or a crash in the Character I/O device driver.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-54436
https://support.blackberry.com/pkb/s/article/141341
https://github.com/advisories/GHSA-v2x4-cfj4-7hfw