Heap-based Buffer Overflow in io-char Library Affects BlackBerry Products
CVE-2026-54436

7.4HIGH

Key Information:

Vendor

Blackberry Ltd

Status
Qnx Software Development Platform
Vendor
CVE Published:
10 November 2026

What is CVE-2026-54436?

A vulnerability exists in the io-char library's DCMD_CHR_WAITINFO devctl() handler, allowing an attacker with local access to potentially execute arbitrary code, tamper with data, or cause disruptions in the Character I/O device driver. This vulnerability underscores the necessity for robust security measures and timely updates to prevent exploitation.

Affected Version(s)

QNX Software Development Platform cpe:2.3:a:blackberry:qnx_software_development_platform:8.0:*:*:*:*:*:*:*

QNX Software Development Platform cpe:2.3:a:blackberry:qnx_software_development_platform:7.1:*:*:*:*:*:*:*

QNX Software Development Platform cpe:2.3:a:blackberry:qnx_software_development_platform:7.0:*:*:*:*:*:*:*

References

https://support.blackberry.com/pkb/s/article/141341

CVSS V3.1

Score:
7.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.