PSF-2022-4

    Dashboard / Vulnerabilities / PSF-2022-4

    PSF-2022-4

    Published: 9 Sept 2022Last Modified: 9 Oct 2025

    Summary: Prevent DoS by large str-int conversions

    Details: A flaw was found in python. In algorithms with quadratic time complexity using non-binary bases, when using int("text"), a system could take 50ms to parse an int string with 100,000 digits and 5s for 1,000,000 digits (float, decimal, int.from_bytes(), and int() for binary bases 2, 4, 8, 16, and 32 are not affected). The highest threat from this vulnerability is to system availability.

    References: https://access.redhat.com/security/cve/CVE-2020-10735, https://github.com/python/cpython/issues/95778, https://github.com/pydantic/pydantic/issues/1477, https://lwn.net/Articles/907572/, https://pythoninsider.blogspot.com/2022/09/python-releases-3107-3914-3814-and-3714.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -15ec1afd4fcd2da1e2d2b256c562fb42d8d886a2

    Affected versions

    2.5

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    PSF-2022-4 | CVE-DB