CVE-2006-6811

mediumpriority · track · 40EPSS 0.106 · 96 %ileexploit · functionalEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

10.6% (96th) EPSS

CVSS 4.3 · medium

Is it mine?

6 products

Check your exposure

Who says so?

3 sources

enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

KsIRC 1.3.12 allows remote attackers to cause a denial of service (crash) via a long PRIVMSG string when connecting to an Internet Relay Chat (IRC) server, which causes an assertion failure and results in a NULL pointer dereference. NOTE: this issue was originally reported as a buffer overflow.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Psecondary · FSTEC (BDU) RU

v3.16.2mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-617USprimaryCWE-617US

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-3023KsIRC 1.3.12 - 'PRIVMSG' Remote Buffer Overflow (PoC)functional · exploit_db

affected products (6)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Gentoo Foundation Inc. Gentoo Linux≤ 2007.0fstec_bduRU
canonical ubuntu linux= 5.10nvdUScpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:*:*:*:*
canonical ubuntu linux= 6.06nvdUScpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:*:*:*:*
canonical ubuntu linux= 6.10nvdUScpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:*:*:*:*
kde ksirc= 1.3.12nvdUScpe:2.3:a:kde:ksirc:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2006-12-29modified 2026-06-16

related (1,031)

Related entries.

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+1026 more

references (26)

External citations — patches, advisories, analysis.

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