CVE-2026-18839Low· 2.2▾ SunlitAn 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 c…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 12.1 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.1%
0.1% → 0.1%
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-18743Low· 2.5A flaw was found in popt
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CVE-2026-98550High· 7.5kernel: tipc: reject invalid and unexpected GRP_ACK_MSG to prevent bc_ackers underflow (CVE-2026-98550)
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CVE-2026-98591Medium· 6.7kernel: bpf: Fix bounds check for skb-backed dynptrs (CVE-2026-98591)
CVE-2026-111881High· 7.6FreeRDP 3.14.1 before 3.32.0 Integer Underflow in BMP Writer via Clipboard