2.2

CVE-2026-18839: rpm-software-management popt Integer Underflow (Wrap or Wraparound)

CVSS: 2.2v3.1LowAwaiting analysis
AliasesRHSA-2026:77932UBUNTU-CVE-2026-18839DEBIAN-CVE-2026-18839
Published 05-08-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-18839 is a low (CVSS 2.2) Integer Underflow (Wrap or Wraparound) vulnerability in rpm-software-management popt. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.1% of scored vulnerabilities.

Overall risk
9/100
0100
Minimal · default modelHow is this calculated?
CVSS score
2.2/10
010
Low · v3.1 (CVE.org)
EPSS score
0.13%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 05-08-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

Description

An integer underflow was found in the popt library when formatting help text for option tables that exceed the terminal width. A local user who can cause an application to print help under those conditions may cause that application to crash or fail to display help, resulting in a denial of service of the affected application.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

+0.04 pp

From 0.08% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.13%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Redhat3 products
  • popt< 0:1.19-11.2.hum1
  • popt-devel< 0:1.19-11.2.hum1
  • popt-static< 0:1.19-11.2.hum1
Debian1 product
  • poptAll versions (No fix recorded)
Rpm-software-management1 product
  • popt≥ 1.13 (No fix recorded)
Ubuntu1 product
  • poptAll versions (No fix recorded)

4 vendors · 6 products

References

10 links