Vulnerability Report

CVE-2011-2939

Title: Perl Memory Corruption

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2011-2939.

CWE Category CWE-189

Published Date Jan 13, 2012

Modified Date Jun 16, 2026

Exploit Status Not Found

Score 5.1 CVSS v2.0

Exploit Probability (EPSS)

2.65%

Vulnerability Summary

CVE-2011-2939: Off-by-one error in the decode_xs function in Unicode/Unicode.xs in the Encode module before 2.44, as used in Perl before 5.15.6, might allow context-dependent attackers to cause a denial of service (memory corruption) via a crafted Unicode string, which triggers a heap-based buffer overflow.

Impacted Vendors

perl 1

larry_wall 1

dan_kogai 1

Reference Links

http://cpansearch.perl.org/src/FLORA/perl-5.14.2/pod/perldelta.pod http://perl5.git.perl.org/perl.git/commitdiff/e46d973584785af1f445c4dedbee4243419cb860#patch5 http://search.cpan.org/~flora/perl-5.14.2/pod/perldelta.pod#Encode_decode_xs_n-byte_heap-overflow_%28CVE-2011-2939%29 http://secunia.com/advisories/46172 http://secunia.com/advisories/46989 http://secunia.com/advisories/51457 http://secunia.com/advisories/55314 http://www.mandriva.com/security/advisories?name=MDVSA-2012:008 http://www.openwall.com/lists/oss-security/2011/08/18/8 http://www.openwall.com/lists/oss-security/2011/08/19/17 http://www.redhat.com/support/errata/RHSA-2011-1424.html http://www.securityfocus.com/bid/49858 http://www.ubuntu.com/usn/USN-1643-1 https://bugzilla.redhat.com/show_bug.cgi?id=731246 http://cpansearch.perl.org/src/FLORA/perl-5.14.2/pod/perldelta.pod http://perl5.git.perl.org/perl.git/commitdiff/e46d973584785af1f445c4dedbee4243419cb860#patch5 http://search.cpan.org/~flora/perl-5.14.2/pod/perldelta.pod#Encode_decode_xs_n-byte_heap-overflow_%28CVE-2011-2939%29 http://secunia.com/advisories/46172 http://secunia.com/advisories/46989 http://secunia.com/advisories/51457 http://secunia.com/advisories/55314 http://www.mandriva.com/security/advisories?name=MDVSA-2012:008 http://www.openwall.com/lists/oss-security/2011/08/18/8 http://www.openwall.com/lists/oss-security/2011/08/19/17 http://www.redhat.com/support/errata/RHSA-2011-1424.html http://www.securityfocus.com/bid/49858 http://www.ubuntu.com/usn/USN-1643-1 https://bugzilla.redhat.com/show_bug.cgi?id=731246

CVSS v2.0

Source Entity [email protected]

Severity MEDIUM

5.1

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:H/Au:N/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2011-2939 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 16, 2026 MODIFIED

Vulnerability data updated via NVD.

April 29, 2026 MODIFIED

Vulnerability data updated via NVD.

April 11, 2025 MODIFIED

Vulnerability data or affected products updated.

January 13, 2012 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A

Complexity N/A

Privileges N/A

Interaction NONE

CVSS Vector String


                                    AV:N/AC:H/Au:N/C:P/I:P/A:P

Affected Stack

No specific products linked.