CVE-2023-31102

7-Zip through 22.01 on Linux allows an integer underflow and code execution via a crafted 7Z...

7.8 HighFix available

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

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

54.0%Up 53.9 points since Nov 3, 2023

What each source reports

NVD Score used 7.8

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

Record: CVE-2023-31102
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-191
Updated: 2026-11-02

CVE List 7.8

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

Record: CVE-2023-31102
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-191
Updated: 2026-11-02

EUVDEUVD-2023-35429 7.8

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

Record: EUVD-2023-35429
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-4cc6-f2xj-w7jx 7.8

7-Zip through 22.01 on Linux allows an integer underflow and code execution via a crafted 7Z...

7-Zip through 22.01 on Linux allows an integer underflow and code execution via a crafted 7Z archive.

Record: GHSA-4cc6-f2xj-w7jx
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-191
Updated: 2026-11-02

OSV 7.8

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

Record: CVE-2023-31102
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2023-31102 7.8

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

Record: DEBIAN-CVE-2023-31102
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2023-31102 7.8

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

Record: UBUNTU-CVE-2023-31102
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`7zip` Debian:12	before 22.01+really25.01+dfsg-0+deb12u1, plus listed versions 22.01+dfsg-10~exp122.01+dfsg-822.01+dfsg-8+deb12u122.01+dfsg-9	22.01+really25.01+dfsg-0+deb12u1
`7zip` Debian:13	before 23.01+dfsg-1	23.01+dfsg-1
`7zip` Debian:14	before 23.01+dfsg-1	23.01+dfsg-1
`p7zip` Debian:12	before 16.02+really25.01+dfsg-0+deb12u1, plus listed versions 16.02+dfsg-8	16.02+really25.01+dfsg-0+deb12u1
`p7zip` Debian:13	before 16.02+transitional.1	16.02+transitional.1
`7zip` Ubuntu:Pro:22.04:LTS	All versions, plus listed versions 21.03~beta+dfsg-621.04~beta+dfsg-121.06+dfsg-121.07+dfsg-121.07+dfsg-221.07+dfsg-321.07+dfsg-421.07+dfsg-4ubuntu0.1~esm1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-31102 is a high vulnerability (CVSS 7.8) in 7-zip, published November 3, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 54.0%, the 99th percentile. Fixed in 7zip 22.01+really25.01+dfsg-0+deb12u1.

References

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