Medium 5.0Published Jan 15, 2009

CVE-2008-5907The png_check_keyword function in pngwutil.c in libpng before 1.0.42, and 1.2.x before 1.2.34, might allow context-dependent attackers to set the value of an arbitrary memory location to zero via vec…

Updated under an hour ago (Nov 2, 2026, 12:10 AM ET)

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No exploitation reported and no EPSS estimate yet.

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The png_check_keyword function in pngwutil.c in libpng before 1.0.42, and 1.2.x before 1.2.34, might allow context-dependent attackers to set the value of an arbitrary memory location to zero via vectors involving creation of crafted PNG files with keywords, related to an implicit cast of the '\0' character constant to a NULL pointer. NOTE: some sources incorrectly report this as a double free vulnerability.

CVSS: 5.0 MEDIUM (v2.0, NVD)AV:N/AC:L/Au:N/C:N/I:P/A:N
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

libpng libpng libpng:libpng	before 1.0.42; from 1.2.0 before 1.2.34	NVD
debian debian_linux debian:debian_linux	4.0; 5.0	NVD

References

References

http://libpng.sourceforge.net/index.html	third-party-advisory
http://lists.opensuse.org/opensuse-security-announce/2009-02/msg00000.html	third-party-advisory
http://openwall.com/lists/oss-security/2009/01/09/1	mailing-list, third-party-advisory
http://secunia.com/advisories/34320	third-party-advisory
http://secunia.com/advisories/34388	third-party-advisory
http://security.gentoo.org/glsa/glsa-200903-28.xml	third-party-advisory
http://sourceforge.net/mailarchive/forum.php?thread_name=4B6F0239C13D0245820603C036D180BC79FBAA%40CABOTUKEXCH01.cabot.local&forum_name=png-mng-implement	third-party-advisory
http://www.debian.org/security/2009/dsa-1750	third-party-advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2009:051	third-party-advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/48128	third-party-advisory, vdb-entry

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.