CVE Watch2 sept 2026

CVE-2026-53600

async-tar is a tar archive reading/writing library for async Rust. Prior to version 0.6.1, async-tar mis-applies a buffered PAX size extensi

CVSS

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Sin CVSS

EPSS

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KEV

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Exploit Today

0-100

Publicado: 2 sept 2026 · Última mod.: 2 sept 2026 · CWE-20 · CWE-843

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

async-tar is a tar archive reading/writing library for async Rust. Prior to version 0.6.1, async-tar mis-applies a buffered PAX size extension to an intermediary extension header (a GNU longname L, a GNU longlink K, or a PAX x/g header) instead of to the next file entry. POSIX requires a PAX extended-header record set to describe the next file entry, never an intervening extension header. Because poll_next_raw (src/archive.rs) threads the buffered PAX records into the size computation of whatever raw header it reads next — and that header can be an intermediary L — the stream cursor is advanced by an attacker-chosen amount when the L body is consumed. The parser then desyncs relative to a POSIX-correct tar parser (e.g. GNU tar), reading subsequent bytes at the wrong block boundary. This issue has been patched in version 0.6.1.

Referencias oficiales

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