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libarchive through 3.7.7 has a heap-based buffer over-read in header_gnu_longlink in archive_read_support_format_tar.c via a TAR archive because it mishandles truncation in the middle of a GNU long linkname.

🗓️ 03 Sep 2025 22:29:47Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 18 Views

Libarchive 3.7.7 has a heap over-read in long linkname handling for TAR archives caused by truncation.

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03 Sep 2025 22:29Current
7High risk
Vulners AI Score7
CVSS 3.14
EPSS0.0025
SSVC
18