CVE-2011-4939

The pidgin_conv_chat_rename_user function in gtkconv.c in Pidgin before 2.10.2 allows remote...

6.4 MediumFix available

The pidgin_conv_chat_rename_user function in gtkconv.c in Pidgin before 2.10.2 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) by changing a nickname while in an XMPP chat room.

Exploit likelihood

3.38%Up 2.1 points since Feb 4, 2022

What each source reports

NVD Score used 6.4

Record: CVE-2011-4939
CVSS 2.0: 6.4 MediumAV:N/AC:L/Au:N/C:N/I:P/A:P
Weakness: CWE-264
Updated: 2026-11-02

CVE List No score

Record: CVE-2011-4939
Updated: 2026-11-02

EUVDEUVD-2011-4849 No score

Record: EUVD-2011-4849
Updated: 2026-11-03

GitHub AdvisoriesGHSA-fqpj-4v5c-wf35 No score

The pidgin_conv_chat_rename_user function in gtkconv.c in Pidgin before 2.10.2 allows remote...

Record: GHSA-fqpj-4v5c-wf35
Updated: 2026-11-02

OSV No score

Record: CVE-2011-4939
Updated: 2026-11-02

OSVDEBIAN-CVE-2011-4939 No score

Record: DEBIAN-CVE-2011-4939
Updated: 2026-11-02

Affected products

pidgin

Affected packages

Affected packages
Package	Affected	Fixed
`pidgin` Debian:12	before 2.10.2-1	2.10.2-1
`pidgin` Debian:13	before 2.10.2-1	2.10.2-1
`pidgin` Debian:14	before 2.10.2-1	2.10.2-1

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2011-4939 is a medium vulnerability (CVSS 6.4) in Pidgin, published March 15, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.38%, the 88th percentile. Fixed in pidgin 2.10.2-1.