What is CVE-2023-30774?

CVE-2023-30774 is a medium-severity vulnerability in Apple macOS, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.5/10. Published 2023-05-19.

How severe is CVE-2023-30774?

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

Buffer overflow in Apple macOS

CVE-2023-30774

A vulnerability was found in the libtiff library. This flaw causes a heap buffer overflow issue via the TIFFTAG_INKNAMES and TIFFTAG_NUMBEROFINKS values.

Vulnerability class: Buffer Overflow

Published 2023-05-19 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.005 (41.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Apple macOS
Libtiff
Libtiff — versions 4.0

Weakness classification (CWE)

References

gitlab.com/libtiff/libtiff/-/issues/463 (Exploit, Third Party Advisory)
access.redhat.com/security/cve/CVE-2023-30774 (Third Party Advisory)
bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
security.netapp.com/advisory/ntap-20230703-0002/ (Third Party Advisory)
support.apple.com/kb/HT213984 (Third Party Advisory, Release Notes)
seclists.org/fulldisclosure/2023/Oct/24 (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2023-30774?: CVE-2023-30774 is a medium-severity vulnerability in Apple macOS, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.5/10. Published 2023-05-19.
How severe is CVE-2023-30774?: Medium severity. CVSS v3 base score is 5.5 out of 10.