Heap-based buffer overflow in XChat 2.8.9 and earlier allows remote attackers to cause a…
Priority LOW 33CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
Heap-based buffer overflow in XChat 2.8.9 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long response string.
Why it matters now
EPSS 0.07696 94th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 59
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:xchat:xchat:*:*:*:*:*:*:*:* | up to 2.8.9 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.2.1:*:*:*:*:*:*:* | 1.2.1 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.3.9:*:*:*:*:*:*:* | 1.3.9 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.3.10:*:*:*:*:*:*:* | 1.3.10 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.3.11:*:*:*:*:*:*:* | 1.3.11 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.3.12:*:*:*:*:*:*:* | 1.3.12 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.3.13:*:*:*:*:*:*:* | 1.3.13 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.4:*:*:*:*:*:*:* | 1.4 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.4.1:*:*:*:*:*:*:* | 1.4.1 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.4.2:*:*:*:*:*:*:* | 1.4.2 | Vulnerable | xchat |
- cpe:2.3:a:xchat:xchat:*:*:*:*:*:*:*:* Versions up to 2.8.9 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.2.1:*:*:*:*:*:*:* Versions 1.2.1 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.3.9:*:*:*:*:*:*:* Versions 1.3.9 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.3.10:*:*:*:*:*:*:* Versions 1.3.10 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.3.11:*:*:*:*:*:*:* Versions 1.3.11 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.3.12:*:*:*:*:*:*:* Versions 1.3.12 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.3.13:*:*:*:*:*:*:* Versions 1.3.13 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.4:*:*:*:*:*:*:* Versions 1.4 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.4.1:*:*:*:*:*:*:* Versions 1.4.1 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.4.2:*:*:*:*:*:*:* Versions 1.4.2 Vulnerable ·xchat
Show 49 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:xchat:xchat:1.4.3:*:*:*:*:*:*:* | 1.4.3 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.5.6:*:*:*:*:*:*:* | 1.5.6 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.8.0:*:*:*:*:*:*:* | 1.8.0 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.8.1:*:*:*:*:*:*:* | 1.8.1 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.8.2:*:*:*:*:*:*:* | 1.8.2 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.8.3:*:*:*:*:*:*:* | 1.8.3 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.8.4:*:*:*:*:*:*:* | 1.8.4 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.8.5:*:*:*:*:*:*:* | 1.8.5 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.8.6:*:*:*:*:*:*:* | 1.8.6 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.8.7:*:*:*:*:*:*:* | 1.8.7 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.8.8:*:*:*:*:*:*:* | 1.8.8 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.8.9:*:*:*:*:*:*:* | 1.8.9 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.9.0:*:*:*:*:*:*:* | 1.9.0 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.9.1:*:*:*:*:*:*:* | 1.9.1 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.9.2:*:*:*:*:*:*:* | 1.9.2 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.9.3:*:*:*:*:*:*:* | 1.9.3 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.9.4:*:*:*:*:*:*:* | 1.9.4 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.9.5:*:*:*:*:*:*:* | 1.9.5 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.9.6:*:*:*:*:*:*:* | 1.9.6 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.9.7:*:*:*:*:*:*:* | 1.9.7 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.9.8:*:*:*:*:*:*:* | 1.9.8 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:1.9.9:*:*:*:*:*:*:* | 1.9.9 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.0.0:*:*:*:*:*:*:* | 2.0.0 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.0.1:*:*:*:*:*:*:* | 2.0.1 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.0.2:*:*:*:*:*:*:* | 2.0.2 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.0.3:*:*:*:*:*:*:* | 2.0.3 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.0.4:*:*:*:*:*:*:* | 2.0.4 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.0.5:*:*:*:*:*:*:* | 2.0.5 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.0.6:*:*:*:*:*:*:* | 2.0.6 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.0.7:*:*:*:*:*:*:* | 2.0.7 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.0.8:*:*:*:*:*:*:* | 2.0.8 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.6.7:*:*:*:*:*:*:* | 2.6.7 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.0:*:*:*:*:*:*:* | 2.8.0 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.1:*:*:*:*:*:*:* | 2.8.1 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.3:*:*:*:*:*:*:* | 2.8.3 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.3:c:*:*:*:*:*:* | 2.8.3 c | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.3:e:*:*:*:*:*:* | 2.8.3 e | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.4:*:*:*:*:*:*:* | 2.8.4 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.5:b:*:*:*:*:*:* | 2.8.5 b | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.5:e:*:*:*:*:*:* | 2.8.5 e | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.6:*:*:*:*:*:*:* | 2.8.6 | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.7:a:*:*:*:*:*:* | 2.8.7 a | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.7:b:*:*:*:*:*:* | 2.8.7 b | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.7:c:*:*:*:*:*:* | 2.8.7 c | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.7:d:*:*:*:*:*:* | 2.8.7 d | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.7:e:*:*:*:*:*:* | 2.8.7 e | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.7:f:*:*:*:*:*:* | 2.8.7 f | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.7b:*:*:*:*:*:*:* | 2.8.7b | Vulnerable | xchat |
| cpe:2.3:a:xchat:xchat:2.8.8:*:*:*:*:*:*:* | 2.8.8 | Vulnerable | xchat |
- cpe:2.3:a:xchat:xchat:1.4.3:*:*:*:*:*:*:* Versions 1.4.3 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.5.6:*:*:*:*:*:*:* Versions 1.5.6 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.8.0:*:*:*:*:*:*:* Versions 1.8.0 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.8.1:*:*:*:*:*:*:* Versions 1.8.1 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.8.2:*:*:*:*:*:*:* Versions 1.8.2 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.8.3:*:*:*:*:*:*:* Versions 1.8.3 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.8.4:*:*:*:*:*:*:* Versions 1.8.4 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.8.5:*:*:*:*:*:*:* Versions 1.8.5 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.8.6:*:*:*:*:*:*:* Versions 1.8.6 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.8.7:*:*:*:*:*:*:* Versions 1.8.7 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.8.8:*:*:*:*:*:*:* Versions 1.8.8 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.8.9:*:*:*:*:*:*:* Versions 1.8.9 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.9.0:*:*:*:*:*:*:* Versions 1.9.0 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.9.1:*:*:*:*:*:*:* Versions 1.9.1 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.9.2:*:*:*:*:*:*:* Versions 1.9.2 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.9.3:*:*:*:*:*:*:* Versions 1.9.3 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.9.4:*:*:*:*:*:*:* Versions 1.9.4 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.9.5:*:*:*:*:*:*:* Versions 1.9.5 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.9.6:*:*:*:*:*:*:* Versions 1.9.6 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.9.7:*:*:*:*:*:*:* Versions 1.9.7 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.9.8:*:*:*:*:*:*:* Versions 1.9.8 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:1.9.9:*:*:*:*:*:*:* Versions 1.9.9 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.0.0:*:*:*:*:*:*:* Versions 2.0.0 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.0.1:*:*:*:*:*:*:* Versions 2.0.1 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.0.2:*:*:*:*:*:*:* Versions 2.0.2 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.0.3:*:*:*:*:*:*:* Versions 2.0.3 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.0.4:*:*:*:*:*:*:* Versions 2.0.4 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.0.5:*:*:*:*:*:*:* Versions 2.0.5 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.0.6:*:*:*:*:*:*:* Versions 2.0.6 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.0.7:*:*:*:*:*:*:* Versions 2.0.7 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.0.8:*:*:*:*:*:*:* Versions 2.0.8 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.6.7:*:*:*:*:*:*:* Versions 2.6.7 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.0:*:*:*:*:*:*:* Versions 2.8.0 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.1:*:*:*:*:*:*:* Versions 2.8.1 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.3:*:*:*:*:*:*:* Versions 2.8.3 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.3:c:*:*:*:*:*:* Versions 2.8.3 c Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.3:e:*:*:*:*:*:* Versions 2.8.3 e Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.4:*:*:*:*:*:*:* Versions 2.8.4 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.5:b:*:*:*:*:*:* Versions 2.8.5 b Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.5:e:*:*:*:*:*:* Versions 2.8.5 e Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.6:*:*:*:*:*:*:* Versions 2.8.6 Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.7:a:*:*:*:*:*:* Versions 2.8.7 a Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.7:b:*:*:*:*:*:* Versions 2.8.7 b Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.7:c:*:*:*:*:*:* Versions 2.8.7 c Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.7:d:*:*:*:*:*:* Versions 2.8.7 d Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.7:e:*:*:*:*:*:* Versions 2.8.7 e Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.7:f:*:*:*:*:*:* Versions 2.8.7 f Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.7b:*:*:*:*:*:*:* Versions 2.8.7b Vulnerable ·xchat
- cpe:2.3:a:xchat:xchat:2.8.8:*:*:*:*:*:*:* Versions 2.8.8 Vulnerable ·xchat
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Not affected: 2 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2011-5129
- 2026-10-03 Alias added: GHSA-q42x-qq8c-c587
References
More Xchat vulnerabilities
- TI-2012-00764 Out-of-bounds write in Xchat-WDK CVSS 3.1CRITICAL 9.8
- TI-2008-02715 Argument injection vulnerability in XChat 2.8.7b and earlier on Windows, when Internet… CVSS 2.0MEDIUM 6.8
- TI-2000-00784 IRC Xchat client versions 1.4.2 and earlier allows remote attackers to execute arbitrary… CVSS 2.0HIGH 7.5
- TI-2004-00374 Stack-based buffer overflow in the Socks-5 proxy code for XChat 1.8.0 to 2.0.8, with… CVSS 2.0HIGH 7.5
- TI-2002-00006 XChat 1.8.7 and earlier, including default configurations of 1.4.2 and 1.4.3, allows… CVSS 2.0HIGH 7.5
- TI-2003-00906 xchat 2.0.6 allows remote attackers to cause a denial of service (crash) via a passive… CVSS 3.1HIGH 7.5
Sources
- CVE-2011-5129 · CVE Program
- CVE-2011-5129 · NVD
- FIRST EPSS
- GHSA-q42x-qq8c-c587 · GitHub Advisory Database · CC BY 4.0
- CVE-2011-5129 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences