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CVE-2025-71450
inih before r63 Stack Buffer Under-Read in ini_parse_stream Discard Loop
Medium4.8EPSS 0.13%
- Published
- Updated
- Reserved
- Assigned by
- VulnCheck
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| VulnCheckCNA (assigner) | 4.0 | Medium4.8 | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |
| VulnCheckCNA (assigner) | 3.1 | Low3.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |
| NVDNVD · Awaiting Analysis | 4.0 | Medium4.8 | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.13% · top 98% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.8.
Weakness
Affected products
References (8)
- https://github.com/benhoyt/inih/pull/206 (opens in a new tab)issue-trackingpatch
- https://github.com/benhoyt/inih/issues/223 (opens in a new tab)issue-tracking
- https://github.com/benhoyt/inih/commit/8e06f6b77b5d4471bdc6d85ada81b67d37354a5c (opens in a new tab)patch
- https://github.com/benhoyt/inih/blob/r62/ini.c#L162-L169 (opens in a new tab)technical-description
- inih r63 Release Notes (opens in a new tab)release-notes
- https://hackmd.io/@haindpwn/inih-long-line-discard-oob-read (opens in a new tab)technical-description
- VulnCheck Advisory: inih before r63 Stack Buffer Under-Read in ini_parse_stream Discard Loop (opens in a new tab)third-party-advisory
- https://hackmd.io/@haindpwn/cve-2025-71450-inih-long-line-discard-oob-read#Detailed-attack-steps (opens in a new tab)exploit
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2025-71450)Record last updated .