What is CVE-2023-26966?

CVE-2023-26966 is a medium-severity vulnerability in Libtiff, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2023-06-29.

How severe is CVE-2023-26966?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2023-26966 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Libtiff

CVE-2023-26966

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.

Vulnerability class: Buffer Overflow

EPSS: 0.004 (34.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Libtiff — versions 4.5.0
N/a — versions n/a

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Patch, Issue Tracking)
cve@mitre.org (Patch)
cve@mitre.org (mailing-list)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2023-26966?: CVE-2023-26966 is a medium-severity vulnerability in Libtiff, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2023-06-29.
How severe is CVE-2023-26966?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2023-26966 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.