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CVE-2025-13462— tarfile: Skip DIRTYPE normalization during GNU LONGNAME/LONGLINK handling

Quick assessment

Affected
Python Software Foundation CPython
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CPython是Python基金会的一个用C语言实现的Python解释器。 CPython存在安全漏洞，该漏洞源于在处理多块成员时对AREGTYPE块应用DIRTYPE规范化不当，可能导致特制tar存档被错误解析。

CVSS 2.0 · Low EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 6

VendorProduct Version RangeStatus
Python Software Foundation CPython < 3.10.21 affected
3.11.0< 3.11.16 affected
3.12.0< 3.12.14 affected
3.13.0< 3.13.13 affected
3.14.0< 3.14.4 affected
3.15.0a1< 3.15.0a8 affected
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I. Basic Information for CVE-2025-13462

Vulnerability Information
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Vulnerability Title
tarfile: Skip DIRTYPE normalization during GNU LONGNAME/LONGLINK handling
Source: CVE Program / CVE List V5
Vulnerability Description
The "tarfile" module would still apply normalization of AREGTYPE (\x00) blocks to DIRTYPE, even while processing a multi-block member such as GNUTYPE_LONGNAME or GNUTYPE_LONGLINK. This could result in a crafted tar archive being misinterpreted by the tarfile module compared to other implementations.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
CPython 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CPython是Python基金会的一个用C语言实现的Python解释器。 CPython存在安全漏洞，该漏洞源于在处理多块成员时对AREGTYPE块应用DIRTYPE规范化不当，可能导致特制tar存档被错误解析。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Python Software Foundation CPython 0 ~ 3.10.21 -

II. Public POCs for CVE-2025-13462

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III. Intelligence Information for CVE-2025-13462

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Patches & Fixes for CVE-2025-13462 (7)

Mailing List Discussions for CVE-2025-13462 (1)

Other References for CVE-2025-13462 (1)

IV. Related Vulnerabilities

Same product: CPython
Same vendor: Python Software Foundation

V. Comments for CVE-2025-13462

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