{"id":"CVE-2025-10995","title":"Open Babel has out-of-bounds write (overlapping memcpy) in zipstream basic_unzip_streambuf::underflow","summary":"Open Babel has out-of-bounds write (overlapping memcpy) in zipstream basic_unzip_streambuf::underflow","severity":"low","cvss":7.8,"cwe":["CWE-787"],"vendor":"openbabel","product":"openbabel","ecosystem":"pip","affected":["openbabel < 3.2.0"],"patched":["openbabel 3.2.0"],"published":"2026-06-30","updated":"2026-06-30","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-8j3x-m868-cpw8","references":[{"url":"https://github.com/openbabel/openbabel/security/advisories/GHSA-8j3x-m868-cpw8"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-10995"},{"url":"https://github.com/openbabel/openbabel/issues/2832"},{"url":"https://github.com/openbabel/openbabel/issues/2913"},{"url":"https://github.com/openbabel/openbabel/commit/d4621d417c167b50cc8ce7aa3a02557e5b2b81c5"},{"url":"https://github.com/user-attachments/files/22318572/poc.zip"},{"url":"https://vuldb.com/?ctiid.325923"},{"url":"https://vuldb.com/?id.325923"},{"url":"https://vuldb.com/?submit.654059"},{"url":"https://github.com/advisories/GHSA-8j3x-m868-cpw8"}],"tags":["ghsa","pip"],"epss":0.00252,"epssPercentile":0.16954,"ingestedAt":"2026-06-30T21:50:09.516Z","slug":"CVE-2025-10995","body":"## Overview\n\n### Summary\n\nA memory-safety vulnerability in Open Babel's bundled zipstream\ndecompression code caused an out-of-bounds write via overlapping\n`memcpy` when reading a crafted gzip-compressed chemistry file.\n\n### Details\n\nThe flaw was in `basic_unzip_streambuf::underflow`. The decompression\nbuffer refill path invoked `memcpy` with overlapping source and\ndestination regions, which is undefined behavior and produced\nout-of-bounds writes in practice. Any file format read through the\ngzip-wrapped reader was a potential trigger.\n\n### Impact\n\nOpen Babel is a C++ library and CLI used to read and write chemistry\nfile formats; it is shipped by Linux distributions and embedded in\nservices that may parse untrusted input. Triggering this vulnerability\nrequires the victim to open a malicious gzip-compressed chemistry file\nwith the `obabel` tool, the `OBConversion` API, or any of the language\nbindings (Python, Ruby, Java, R, Perl, C#, PHP).\n\n### Affected versions\n\nAll releases up to and including 3.1.1.\n\n### Patched version\n\n3.2.0 (released 2026-05-26).\n\n### Patch\n\nFix commit: https://github.com/openbabel/openbabel/commit/d4621d41\nOriginally reported as #2832; fixes consolidated in #2913.\n\nA minimized reproducer for this CVE is checked in under\n`test/files/fuzz_regress/` and is exercised on every CI build under\nASAN+UBSAN by the `fuzzregresstest` harness.\n\n### Credit\n\nReported via OSS-Fuzz.\n\n## Affected packages\n\n- `openbabel < 3.2.0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `openbabel 3.2.0`","depth":"sunlit","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}