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Fencer Intel
critical 9.8

CVE-2017-10966 json

An issue was discovered in Irssi before 1.0.4.

published 9y ago modified 4mo ago also EUVD-2017-2604

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

An issue was discovered in Irssi before 1.0.4. While updating the internal nick list, Irssi could incorrectly use the GHashTable interface and free the nick while updating it. This would then result in use-after-free conditions on each access of the hash table.

Patch / fix

  • irssi Debian 14, Debian 13, Debian 12 1.0.4-1

debian advisories DEBIAN-CVE-2017-10966

  • irssi Ubuntu 14.04 LTS 0.8.15-5ubuntu3.3
  • irssi Ubuntu 16.04 LTS 0.8.19-1ubuntu1.5

ubuntu advisories UBUNTU-CVE-2017-10966

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • irssi openSUSE Tumbleweed 1.2.3-2.4
  • irssi Package Hub 12 1.0.4-28.1

opensuse advisories openSUSE-SU-2024:10865-1openSUSE-SU-2017:1823-1openSUSE-SU-2017:1824-1

  • irssi Alpine 3.24, Alpine 3.23, Alpine 3.22 +15 more 1.0.4-r0
  • irssi Alpine 3.5, Alpine 3.4, Alpine 3.3 0.8.21.r2

alpine advisories ALPINE-CVE-2017-10966

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • irssi Arch Linux 1.0.4-1

arch linux advisories AVG-342

Is CVE-2017-10966 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-10966 updated cvss 4.8

irssi: Use-after-free while updating the internal nick list

  • Red Hat Enterprise Linux 6 irssi Red Hat Enterprise Linux 7 irssi
    affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.94% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.