Heap-based Buffer Overflow Affecting 7zip-standalone-all-debuginfo package, versions <0:26.02-17.amzn2023.0.1


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.94% (58th percentile)

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  • Snyk IDSNYK-AMZN2023-7ZIPSTANDALONEALLDEBUGINFO-18531942
  • published5 Aug 2026
  • disclosed29 Jul 2026

Introduced: 29 Jul 2026

NewCVE-2026-14266  (opens in a new tab)
CWE-122  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 7zip-standalone-all-debuginfo to version 0:26.02-17.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2026-2037.

NVD Description

Note: Versions mentioned in the description apply only to the upstream 7zip-standalone-all-debuginfo package and not the 7zip-standalone-all-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the processing of XZ chunked data. Crafted XZ-compressed data can trigger an overflow of a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-30169.

CVSS Base Scores

version 3.1