Is CVE-2017-10966 in the CISA KEV catalog?

No. CVE-2017-10966 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-10966?

CVE-2017-10966 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2017-10966?

CVE-2017-10966 has an EPSS score of 2.94% (85th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-10966?

Upgrade irssi on debian 11 to 1.0.4-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2017-10966

CRITICALEPSS 85th pctl

9.8

CVSS v3

NVD

Description

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.

CWE-416Use After Free

How to fix

Remediation Available

irssiDebian

Fixed in:1.0.4-1CVE-2017-10966

irssiUbuntu

Fixed in:0.8.15-5ubuntu3.3USN-3465-1

Fixed in:0.8.19-1ubuntu1.5USN-3465-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

2.94%probability of exploitation in 30 days

85thpercentile

Elevated risk: more likely to be exploited than 85% of all known CVEs.

References

Patch2

Other references1

debian.org

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.