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    CVE-2011-2501

    The png_format_buffer function in pngerror.c in libpng 1.0.x before 1.0.55, 1.2.x before 1.2.45, 1.4.x before 1.4.8, and 1.5.x before 1.5.4 allows remote attackers to cause a denial of service (application crash) via a crafted PNG image that triggers an out-of-bounds read during the copying of error-message data. NOTE: this vulnerability exists because of a CVE-2004-0421 regression. NOTE: this is called an off-by-one error by some sources.

    Published:Jun 7, 2011
    Last Modified:Apr 11, 2025
    EPS:Jul 17, 2011
    EPSS Score:0.00566
    CVSS Score:6.5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Libpng
    Product
    Libpng
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    http://sourceforge.net/mailarchive/forum.php?thread_name=BANLkTikrnU6FJNQYFvwmt78hwpgKPVRd1Q%40mail.gmail.com&forum_name=png-mng-implementhttp://sourceforge.net/mailarchive/forum.php?thread_name=BANLkTikrnU6FJNQYFvwmt78hwpgKPVRd1Q%40mail.gmail.com&forum_name=png-mng-implement

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    Related CVEs

    CVE-2026-13476 (CVSS 7.3) — IBM Informix Dynamic Server 14.10, 15.0, and 12.10 could allow an unauthenticated user to execute arbitrary co…
    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    References

    http://libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng/libpng%3Ba=commit%3Bh=65e6d5a34f49acdb362a0625a706c6b914e670af
    http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062720.html
    http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063118.html
    http://secunia.com/advisories/45046
    http://secunia.com/advisories/45289
    http://secunia.com/advisories/45405
    http://secunia.com/advisories/45415
    http://secunia.com/advisories/45460
    http://secunia.com/advisories/45486
    http://secunia.com/advisories/45492
    http://secunia.com/advisories/49660
    http://security.gentoo.org/glsa/glsa-201206-15.xml
    http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.617466
    http://sourceforge.net/mailarchive/forum.php?thread_name=BANLkTikrnU6FJNQYFvwmt78hwpgKPVRd1Q%40mail.gmail.com&forum_name=png-mng-implement
    http://www.debian.org/security/2011/dsa-2287
    http://www.mandriva.com/security/advisories?name=MDVSA-2011:151
    http://www.openwall.com/lists/oss-security/2011/06/27/13
    http://www.openwall.com/lists/oss-security/2011/06/28/16
    http://www.redhat.com/support/errata/RHSA-2011-1105.html
    http://www.securityfocus.com/bid/48474
    http://www.ubuntu.com/usn/USN-1175-1
    https://bugzilla.redhat.com/show_bug.cgi?id=717084
    https://exchange.xforce.ibmcloud.com/vulnerabilities/68517
    http://libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng/libpng%3Ba=commit%3Bh=65e6d5a34f49acdb362a0625a706c6b914e670af
    http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062720.html
    http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063118.html
    http://secunia.com/advisories/45046
    http://secunia.com/advisories/45289
    http://secunia.com/advisories/45405
    http://secunia.com/advisories/45415
    http://secunia.com/advisories/45460
    http://secunia.com/advisories/45486
    http://secunia.com/advisories/45492
    http://secunia.com/advisories/49660
    http://security.gentoo.org/glsa/glsa-201206-15.xml
    http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.617466
    http://sourceforge.net/mailarchive/forum.php?thread_name=BANLkTikrnU6FJNQYFvwmt78hwpgKPVRd1Q%40mail.gmail.com&forum_name=png-mng-implement
    http://www.debian.org/security/2011/dsa-2287
    http://www.mandriva.com/security/advisories?name=MDVSA-2011:151
    http://www.openwall.com/lists/oss-security/2011/06/27/13
    http://www.openwall.com/lists/oss-security/2011/06/28/16
    http://www.redhat.com/support/errata/RHSA-2011-1105.html
    http://www.securityfocus.com/bid/48474
    http://www.ubuntu.com/usn/USN-1175-1
    https://bugzilla.redhat.com/show_bug.cgi?id=717084
    https://exchange.xforce.ibmcloud.com/vulnerabilities/68517

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High