Buffer overflow in Rpm-Software-Management Popt
CVE-2026-18739
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.
Vulnerability class: Buffer Overflow
EPSS: 0.001 (1.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 2.5 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L.
Affected products
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
Frequently asked questions
- What is CVE-2026-18739?
- CVE-2026-18739 is a low-severity vulnerability in Rpm-Software-Management Popt, classified under Out-of-bounds Write. CVSS score: 2.5/10. Published 2026-08-04.
- How severe is CVE-2026-18739?
- Low severity. CVSS v3 base score is 2.5 out of 10.