Integer overflow in 7-zip

CVE-2023-31102

Ppmd7.c in 7-Zip before 23.00 allows an integer underflow and invalid read operation via a crafted 7Z archive.

EPSS: 0.710 (99.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

CWE-191 — Integer Underflow

Public proof-of-concept exploits

DeclanMWorley/VulnerabilityScannerLab

References

cve@mitre.org (Product)
cve@mitre.org (VDB Entry, Third Party Advisory)
cve@mitre.org (Release Notes, Issue Tracking)
cve@mitre.org (Third Party Advisory)
cve@mitre.org

Frequently asked questions

What is CVE-2023-31102?: CVE-2023-31102 is a high-severity vulnerability in 7-zip, classified under Integer Underflow. CVSS score: 7.8/10. Published 2023-11-03.
How severe is CVE-2023-31102?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2023-31102 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.