CVE-2015-8540

libpng: underflow read in png_check_keyword()

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Severity

Low

Red Hat Product Security

7.6

CVSS 3.0

Review impact separately from score.

Published · December 10, 2015

Updated · June 28, 2026

Description

Integer underflow in the png_check_keyword function in pngwutil.c in libpng 0.90 through 0.99, 1.0.x before 1.0.66, 1.1.x and 1.2.x before 1.2.56, 1.3.x and 1.4.x before 1.4.19, and 1.5.x before 1.5.26 allows remote attackers to have unspecified impact via a space character as a keyword in a PNG image, which triggers an out-of-bounds read.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 7.6
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

CVSS 2.0 · 5.4
AV:N/AC:H/Au:N/C:N/I:N/A:C

CWE-125 · Out-of-bounds Read