Description
libpurple/protocols/irc/msgs.c in the IRC protocol plugin in libpurple in Pidgin before 2.6.2 allows remote IRC servers to cause a denial of service (NULL pointer dereference and application crash) via a TOPIC message that lacks a topic string.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | pidgin | 2.6.2 | — |
| Debian 13 | pidgin | 2.6.2 | — |
| Debian 12 | pidgin | 2.6.2 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | finch +8 | 2.6.2-2.el5 | RHSA-2009:1453 |
| RHEL 4 | finch +8 | 2.6.2-2.el4 | RHSA-2009:1453 |
| RHEL 3 | pidgin | 1.5.1-6.el3 | RHSA-2009:1535 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | finch +8 | 2.6.2-2.el5 | RHSA-2009:1453 |
Advisories 2
- RHSA-2009:1453 Red Hat Security Advisory: pidgin security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2009:1535 Red Hat Security Advisory: pidgin security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- 36601 third-party-advisory
- oval:org.mitre.oval:def:6435 vdb-entry signature
- http://developer.pidgin.im/viewmtn/revision/info/ad2c6ee53ec9122b25aeb1f918db53be69bdeac3
- http://www.pidgin.im/news/security/index.php?id=40
- oval:org.mitre.oval:def:11379 vdb-entry signature
- 36277 vdb-entry