Is CVE-2023-26966 in the CISA KEV catalog?

No. CVE-2023-26966 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-26966?

CVE-2023-26966 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2023-26966?

CVE-2023-26966 has an EPSS score of 0.42% (34th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-26966?

Upgrade tiff on debian 11 to 4.2.0-1+deb11u6 or later. Fixes are available for 17 affected products.

CVE & CISA-KEV Catalog

CVE-2023-26966

MEDIUM

5.5

CVSS v3

NVD

Description

libtiff 4.5.0 is vulnerable to Buffer Overflow in uv_encode() when libtiff reads a corrupted little-endian TIFF file and specifies the output to be big-endian.

CWE-120Classic Buffer Overflow

How to fix

Remediation Available

tiffDebian

Fixed in:4.2.0-1+deb11u6CVE-2023-26966

Fixed in:4.5.0-6+deb12u2CVE-2023-26966

Fixed in:4.5.1~rc3-1CVE-2023-26966

libtiffRed Hat / RHEL

Fixed in:0:4.4.0-10.el9RHSA-2023:6575

libtiffRocky

Fixed in:0:4.4.0-10.el9RHSA-2023:6575

libtiff-debuginfoRocky

Fixed in:0:4.4.0-10.el9RHSA-2023:6575

libtiff-debuginfoRed Hat / RHEL

Fixed in:0:4.4.0-10.el9RHSA-2023:6575

libtiff-debugsourceRocky

Fixed in:0:4.4.0-10.el9RHSA-2023:6575

libtiff-debugsourceRed Hat / RHEL

Fixed in:0:4.4.0-10.el9RHSA-2023:6575

libtiff-develRocky

Fixed in:0:4.4.0-10.el9RHSA-2023:6575

libtiff-develRed Hat / RHEL

Fixed in:0:4.4.0-10.el9RHSA-2023:6575

libtiff-toolsRocky

Fixed in:0:4.4.0-10.el9RHSA-2023:6575

libtiff-toolsRed Hat / RHEL

Fixed in:0:4.4.0-10.el9RHSA-2023:6575

libtiff-tools-debuginfoRocky

Fixed in:0:4.4.0-10.el9RHSA-2023:6575

libtiff-tools-debuginfoRed Hat / RHEL

Fixed in:0:4.4.0-10.el9RHSA-2023:6575

libtiff-toolsUbuntu

Fixed in:4.0.3-7ubuntu0.11+esm9USN-6290-1

Fixed in:4.0.3-7ubuntu0.11+esm8USN-6229-1

Fixed in:4.0.6-1ubuntu0.8+esm12USN-6290-1

Fixed in:4.0.6-1ubuntu0.8+esm11USN-6229-1

Fixed in:4.0.9-5ubuntu0.10+esm1USN-6229-1

Fixed in:4.0.9-5ubuntu0.10+esm2USN-6290-1

Fixed in:4.1.0+git191117-2ubuntu0.20.04.9USN-6290-1

Fixed in:4.3.0-6ubuntu0.5USN-6290-1

Fixed in:4.5.0-5ubuntu1.1USN-6290-1

libtiff5Ubuntu

Fixed in:4.0.3-7ubuntu0.11+esm8USN-6229-1

Fixed in:4.0.3-7ubuntu0.11+esm9USN-6290-1

Fixed in:4.0.6-1ubuntu0.8+esm12USN-6290-1

Fixed in:4.0.6-1ubuntu0.8+esm11USN-6229-1

Fixed in:4.0.9-5ubuntu0.10+esm1USN-6229-1

Fixed in:4.0.9-5ubuntu0.10+esm2USN-6290-1

Fixed in:4.1.0+git191117-2ubuntu0.20.04.9USN-6290-1

Fixed in:4.3.0-6ubuntu0.5USN-6290-1

libtiff6Ubuntu

Fixed in:4.5.0-5ubuntu1.1USN-6290-1

tiffUbuntu

Fixed in:4.0.3-7ubuntu0.11+esm9USN-6290-1

Fixed in:4.0.3-7ubuntu0.11+esm8USN-6229-1

Fixed in:4.0.6-1ubuntu0.8+esm12USN-6290-1

Fixed in:4.0.6-1ubuntu0.8+esm11USN-6229-1

Fixed in:4.0.9-5ubuntu0.10+esm1USN-6229-1

Fixed in:4.0.9-5ubuntu0.10+esm2USN-6290-1

Fixed in:4.1.0+git191117-2ubuntu0.20.04.9USN-6290-1

Fixed in:4.3.0-6ubuntu0.5USN-6290-1

Fixed in:4.5.0-5ubuntu1.1USN-6290-1

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 VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Exploit Intelligence

0.42%probability of exploitation in 30 days

34thpercentile

Low risk: more likely to be exploited than 34% of all known CVEs.

References

Patch2

Other references2

Related Vulnerabilities

Other CWE-120 (Classic Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0195	Medium	6.8	100%	-	Fix
CVE-2017-7269	Critical	9.8	100%	KEV	-
CVE-2019-11043	High	8.7	99%	KEV + Ransom	Fix
CVE-2011-4862	High	10.0	95%	-	Fix
CVE-2007-5659	High	7.8	94%	KEV	Fix
CVE-2022-3786	High	7.5	91%	-	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 2025-11-03.