CVE-2025-40843

Buffer overflow in CodeChecker log command

HIGH
7.8
CVSS Score
Published: October 28, 2025 at 06:49 PM UTC
Updated: October 8, 2026 at 11:10 AM UTC
1 product affected across 1 vendorCodeChecker

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
PoC

Description

CodeChecker is an analyzer tooling, defect database and viewer extension for the Clang Static Analyzer and Clang Tidy. CodeChecker versions up to 6.26.1 contain a buffer overflow vulnerability in the internal ldlogger library, which is executed by the CodeChecker log command. This issue affects CodeChecker: through 6.26.1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 6.26.20 ≤ v ≤ 6.26.1*0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-121

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