Improper Validation of Array Index Affecting rsync-debuginfo package, versions <0:3.5.1-1.amzn2023.0.1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.31% (22nd percentile)

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  • Snyk IDSNYK-AMZN2023-RSYNCDEBUGINFO-20246751
  • published29 Sept 2026
  • disclosed13 Aug 2026

Introduced: 13 Aug 2026

CVE-2026-53792  (opens in a new tab)
CWE-129  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 rsync-debuginfo to version 0:3.5.1-1.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2026-3131.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rsync-debuginfo package and not the rsync-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

rsync before 3.5.0 contains an out-of-bounds read vulnerability in the sender-side block matching logic that allows a malicious receiver to trigger memory access before the start of an allocated buffer by sending a crafted checksum block with a length of zero. Attackers can send a specially crafted checksum set containing a zero-length block to cause a negative offset calculation during delta computation, resulting in an out-of-bounds read of file data buffer memory on the sender side.

CVSS Base Scores

version 3.1