CVE-2026-18743: Incorrect Calculation of Buffer Size in rpm-software-management popt
A flaw was found in popt. This vulnerability allows an attacker to provide specially crafted configuration content to a host, which, when loaded, can lead to a small memory corruption issue. This occurs because of an error in how the `poptConfigFileToString` function reallocates memory for buffers. Successful exploitation could result in heap metadata corruption, potentially causing the affected process to become unavailable (denial of service).
CVE-2026-18743: Incorrect Calculation of Buffer Size in rpm-software-management popt
Description
A flaw was found in popt. This vulnerability allows an attacker to provide specially crafted configuration content to a host, which, when loaded, can lead to a small memory corruption issue. This occurs because of an error in how the `poptConfigFileToString` function reallocates memory for buffers. Successful exploitation could result in heap metadata corruption, potentially causing the affected process to become unavailable (denial of service).
CVSS v3.1
Score 2.5low
Affected software
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Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-08-03T21:13:24.066Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-18743","vendor":"Red Hat"}]
Threat ID: 6a9628e2acd9273b49e86fe9
Added to database: 09/01/2026, 01:22:42 UTC
Last updated: 09/01/2026, 03:07:20 UTC
Views: 6
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