CVE-2025-71450

CVSS 4.8 (medium) · published 2026-11-02

inih before r63 contains a one-byte stack buffer under-read in ini_parse_stream() in ini.c that allows attackers to read abyss[-1] via an embedded NUL byte after an overlong line. Attackers can supply an INI file or string with a line of at least INI_MAX_LINE-1 bytes followed by a NUL byte, causing undefined behavior reported by memory sanitizers.

Weakness: CWE-127

Source: NVD CVE-2025-71450

References

• https://github.com/benhoyt/inih/blob/r62/ini.c#L162-L169
• https://github.com/benhoyt/inih/commit/8e06f6b77b5d4471bdc6d85ada81b67d37354a5c
• https://github.com/benhoyt/inih/issues/223
• https://github.com/benhoyt/inih/pull/206
• https://github.com/benhoyt/inih/releases/tag/r63
• https://hackmd.io/@haindpwn/inih-long-line-discard-oob-read
• https://www.vulncheck.com/advisories/inih-before-r63-stack-buffer-under-read-in-ini-parse-stream-discard-loop
• https://hackmd.io/@haindpwn/cve-2025-71450-inih-long-line-discard-oob-read#Detailed-attack-steps

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