Critical
poco — security advisory
UTF32Encoding.cpp in POCO has a Poco::UTF32Encoding integer overflow and resultant stack buffer overflow because Poco::UTF32Encoding::convert() and Poco::UTF32::queryConvert() may return a negative integer if a UTF-32 byte sequence evaluates to a value of 0x80000000 or higher. This is fixed in 1.11.8p2, 1.12.5p2, and 1.13.0.
- Products
- poco
- Affected versions
- 1.10.0-6, 1.11.0-3, 1.11.0-4, 1.11.0-4.1, 1.11.0-4.1build1, 1.11.0-4.1build2, 1.13.0-6build2, 1.14.2-3, 1.14.2-6, 1.14.2-6ubuntu1, 1.14.2-6ubuntu2, 1.3.6p1-4, 1.3.6p1-4+deb7u1build1, 1.3.6p1-5.1, 1.3.6p1-5.1build1, 1.3.6p1-5.1ubuntu0.1, 1.7.8+dfsg1-2, 1.7.8+dfsg1-3, 1.8.0.1-1ubuntu4, 1.9.2-3ubuntu2, 1.9.2-3ubuntu3
- Fixed versions
- Not specified
- CVEs
- CVE-2023-52389
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:44 UTC · Revision 1
Source evidence
UTF32Encoding.cpp in POCO has a Poco::UTF32Encoding integer overflow and resultant stack buffer overflow because Poco::UTF32Encoding::convert() and Poco::UTF32::queryConvert() may return a negative integer if a UTF-32 byte sequence evaluates to a value of 0x80000000 or higher. This is fixed in 1.11.8p2, 1.12.5p2, and 1.13.0.
osv:UBUNTU-CVE-2023-52389
poco
Fixed versions: Not specified
poco
Fixed versions: Not specified
poco
Fixed versions: Not specified
poco
Fixed versions: Not specified
poco
Fixed versions: Not specified
poco
Fixed versions: Not specified
poco
Fixed versions: Not specified
poco
Fixed versions: Not specified
poco
Fixed versions: Not specified
Complete source record
{
"id": "a1aaf5c52f1f799cf1d34600ee09b3c7a7186db1297e6d2710c1c18ea836e7b7",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2023-52389",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2023-52389",
"summary": "UTF32Encoding.cpp in POCO has a Poco::UTF32Encoding integer overflow and resultant stack buffer overflow because Poco::UTF32Encoding::convert() and Poco::UTF32::queryConvert() may return a negative integer if a UTF-32 byte sequence evaluates to a value of 0x80000000 or higher. This is fixed in 1.11.8p2, 1.12.5p2, and 1.13.0.",
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"severity": "critical",
"structured": {
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"aliases": [
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},
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"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
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"score": "medium"
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],
"modified": "2026-10-17T12:57:21.949318649Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2023-52389",
"https://pocoproject.org/blog/?p=1226",
"https://github.com/pocoproject/poco/issues/4320",
"https://github.com/pocoproject/poco/commit/62f875dfe1298041289f926a6a1a39cb765b13ee",
"https://github.com/pocoproject/poco/compare/poco-1.12.5p2-release...poco-1.13.0-release",
"https://www.cve.org/CVERecord?id=CVE-2023-52389"
]
},
"related_cves": [
{
"value": "CVE-2023-52389",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 357337,
"published_at": "2024-01-27T03:15:00+00:00"
}