CVE-2026-18743
LowCVSS 2.5Summary
Vulnerability in the popt library allows an attacker to provide specially crafted configuration content that, when loaded, can lead to a small memory corruption issue due to an error in how the poptConfigFileToString function reallocates memory for buffers.
Risk Assessment
Successful exploitation could result in heap metadata corruption, potentially causing the affected process to become unavailable (denial of service).
Recommendation
Update the popt library to a version containing a fix for this issue, if available.
Other vulnerabilities in popt
See all- CVE-2026-18839Low
An integer underflow was found in the popt library when formatting help text for option tables wider than the terminal width. A local user who can cause an application to print help under those conditions may cause the application to crash or fail to display help, resulting in a denial of service.
- CVE-2026-18739Low
A flaw was found in popt, a command-line option parsing library. An off-by-one error in the poptStuffArgs function, when repeatedly called by a host application or through deep alias nesting, can lead to corruption of internal program data. This corruption could potentially enable a local attacker to execute arbitrary code if the host application then unsafely processes the altered data.
Original NVD description (English source)
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).