CVE-2026-18743
Low
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).
SeverityLow
CVSS2.5
Exploit probability—
Product
Microsoft Azl3 Popt
PublishedSep 1, 2026
First seenSep 1, 2026
Weakness typeCWE-131CWE-131
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft azl3_popt_1.19-1 | No range specified | — |
| microsoft azl3_rsync_3.4.3-1 | No range specified | — |
| microsoft azl3_rsync_3.5.0-1 | No range specified | — |
| microsoft azl3_popt_1.19-2 | No range specified | — |
| microsoft azl3_rsync_3.5.1-1 | No range specified | — |
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