The utf-16 decoder in Python 3.1 through 3.3 does not update the aligned_end variable after calling the unicode_decode_call_errorhandler…

Description

The utf-16 decoder in Python 3.1 through 3.3 does not update the aligned_end variable after calling the unicode_decode_call_errorhandler function, which allows remote attackers to obtain sensitive information (process memory) or cause a denial of service (memory corruption and crash) via unspecified vectors.

Scores

EPSS (exploitation in 30 days)

4.5% · top 8.4% of all CVEs (2 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.4.

Weakness

• n/a

Affected products

• n/a

  • affected n/a

References (8)

• USN-1615-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• 51087 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• USN-1616-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• http://bugs.python.org/issue14579 (opens in a new tab)x_refsource_MISCx_transferred
• 51089 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=670389 (opens in a new tab)x_refsource_MISCx_transferred
• [oss-security] 20120425 Re: CVE Request: Python 3.2/3.3 utf-16 decoder unicode_decode_call_errorhandler aligned_end is not updated (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [oss-security] 20120425 CVE Request: Python 3.2/3.3 utf-16 decoder unicode_decode_call_errorhandler aligned_end is not updated (opens in a new tab)mailing-listx_refsource_MLISTx_transferred

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)

Record last updated 6 Aug 2024, 19:26 UTC.