CVE-2026-34556

iccDEV: HBO in icAnsiToUtf8()

MEDIUM
5.5
CVSS Score
Published: March 31, 2026 at 10:22 PM UTC
Updated: June 17, 2026 at 10:39 AM UTC
2 products affected across 2 vendorsIccdeviccDEV

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
PoC

Description

iccDEV provides a set of libraries and tools for working with ICC color management profiles. Prior to version 2.3.1.6, there is a heap-buffer-overflow (HBO) in icAnsiToUtf8() in the XML conversion path. The issue is triggered by a crafted ICC profile which causes icAnsiToUtf8(std::string&, char const*) to treat an input buffer as a C-string and call operations that rely on strlen()/null-termination. AddressSanitizer reports an out-of-bounds READ of size 115 past a 114-byte heap allocation, with the failure observed while running the iccToXml tool. This issue has been patched in version 2.3.1.6.

Affected

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

v < 2.3.1.6
v < 2.3.1.6
Affected range stops below 2.3.1.6, so it looks safe — our inference, not a vendor statement

References (3)

x_refsource_MISCExploitIssue TrackingPatch
Source: cverecord
https://github.com/InternationalColorConsortium/iccDEV/issues/734
x_refsource_MISCIssue TrackingPatch
Source: cverecord
https://github.com/InternationalColorConsortium/iccDEV/pull/740

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
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-125

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