What is CVE-2022-39843?

CVE-2022-39843 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-09-05.

How severe is CVE-2022-39843?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Linux Kernel

CVE-2022-39843

123elf Lotus 1-2-3 before 1.0.0rc3 for Linux, and Lotus 1-2-3 R3 for UNIX and other platforms through 9.8.2, allow attackers to execute arbitrary code via a crafted worksheet. This occurs because of a stack-based buffer overflow in the cell format processing routines, as demonstrated by a certain function call from process_fmt() that can be reached via a w3r_format element in a wk3 document.

Vulnerability class: Buffer Overflow

Published 2022-09-05 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.005 (39.4th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.4% 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

Linux Kernel
Lotus 1-2-3 Project — versions 1.0.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/taviso/123elf/issues/103 (Exploit, Third Party Advisory, Issue Tracking)
github.com/taviso/123elf/releases/tag/v1.0.0rc3 (Third Party Advisory, Release Notes)

Frequently asked questions

What is CVE-2022-39843?: CVE-2022-39843 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-09-05.
How severe is CVE-2022-39843?: High severity. CVSS v3 base score is 7.8 out of 10.