CVE-2023-26966: libtiff Classic Buffer Overflow
CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2023-26966DEBIAN-CVE-2023-26966
Published 29-06-2023Last modified 03-11-2025
Vulnerability summary
CVE-2023-26966 is a medium (CVSS 5.5) Classic Buffer Overflow vulnerability in libtiff. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 34.6% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
5.5/10
010
Medium · v3.1 (NVD)EPSS score
0.42%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 8 · Related 4Timeline
- 29-06-2023PublishedVulnerability first disclosed.
- 03-11-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 3 sources · 1 versionMedium 5.5Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.42%
Chance of exploitation in the next 30 days
Percentile
35%
Versus all other CVEs
30-day change
0.00 pp
From 0.42% on 19-09-2026
19-09-202619-10-2026
EPSS score0.42%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (gitlab.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian1 product
- tiff< 4.5.0-6+deb12u2 | < 4.5.1~rc3-1
Libtiff1 product
- libtiff4.5.0
Ubuntu1 product
- tiff< 4.0.3-7ubuntu0.11+esm8 | < 4.0.6-1ubuntu0.8+esm11 | < 4.0.9-5ubuntu0.10+esm1 | < 4.1.0+git191117-2ubuntu0.20.04.9 | < 4.3.0-6ubuntu0.5
3 vendors · 3 products
