ubuntu-cve-2025-4516
Vulnerability from osv_ubuntu
Published
2025-05-15 14:15
Modified
2026-05-20 15:15
Summary
Details
There is an issue in CPython when using bytes.decode("unicode_escape", error="ignore|replace"). If you are not using the "unicode_escape" encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError.
Severity
N/A (UNKNOWN)
References
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"binary_version": "3.14.0-1"
},
{
"binary_name": "libpython3.14",
"binary_version": "3.14.0-1"
},
{
"binary_name": "libpython3.14-minimal",
"binary_version": "3.14.0-1"
},
{
"binary_name": "libpython3.14-stdlib",
"binary_version": "3.14.0-1"
},
{
"binary_name": "libpython3.14-testsuite",
"binary_version": "3.14.0-1"
},
{
"binary_name": "python3.14",
"binary_version": "3.14.0-1"
},
{
"binary_name": "python3.14-examples",
"binary_version": "3.14.0-1"
},
{
"binary_name": "python3.14-full",
"binary_version": "3.14.0-1"
},
{
"binary_name": "python3.14-gdbm",
"binary_version": "3.14.0-1"
},
{
"binary_name": "python3.14-minimal",
"binary_version": "3.14.0-1"
},
{
"binary_name": "python3.14-nopie",
"binary_version": "3.14.0-1"
},
{
"binary_name": "python3.14-tk",
"binary_version": "3.14.0-1"
},
{
"binary_name": "python3.14-venv",
"binary_version": "3.14.0-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "python3.14",
"purl": "pkg:deb/ubuntu/python3.14@3.14.0-1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.14.0-1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.14.0~a7-0ubuntu1",
"3.14.0~b1-1",
"3.14.0~b3-1",
"3.14.0~rc1-1",
"3.14.0~rc2-1",
"3.14.0~rc3-1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "idle-python3.14",
"binary_version": "3.14.0-1"
},
{
"binary_name": "libpython3.14",
"binary_version": "3.14.0-1"
},
{
"binary_name": "libpython3.14-minimal",
"binary_version": "3.14.0-1"
},
{
"binary_name": "libpython3.14-stdlib",
"binary_version": "3.14.0-1"
},
{
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},
{
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},
{
"binary_name": "python3.14-examples",
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},
{
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},
{
"binary_name": "python3.14-gdbm",
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},
{
"binary_name": "python3.14-minimal",
"binary_version": "3.14.0-1"
},
{
"binary_name": "python3.14-nopie",
"binary_version": "3.14.0-1"
},
{
"binary_name": "python3.14-tk",
"binary_version": "3.14.0-1"
},
{
"binary_name": "python3.14-venv",
"binary_version": "3.14.0-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "python3.14",
"purl": "pkg:deb/ubuntu/python3.14@3.14.0-1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.14.0-1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": []
}
],
"aliases": [],
"details": "There is an issue in CPython when using `bytes.decode(\"unicode_escape\", error=\"ignore|replace\")`. If you are not using the \"unicode_escape\" encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError.",
"id": "UBUNTU-CVE-2025-4516",
"modified": "2026-05-20T15:15:57Z",
"published": "2025-05-15T14:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2025-4516"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-4516"
},
{
"type": "REPORT",
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/L75IPBBTSCYEF56I2M4KIW353BB3AY74/"
},
{
"type": "REPORT",
"url": "https://github.com/python/cpython/pull/129648"
},
{
"type": "REPORT",
"url": "https://github.com/python/cpython/commit/9f69a58623bd01349a18ba0c7a9cb1dad6a51e8e"
},
{
"type": "REPORT",
"url": "https://github.com/python/cpython/commit/5646648678295a44aa82636c6e92826651baf33a"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-7570-1"
}
],
"related": [
"USN-7570-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2025-4516"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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