Out-of-bounds Write Affecting coreutils-libs package, versions *


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.15% (5th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-CENTOS6-COREUTILSLIBS-18308987
  • published25 Jul 2026
  • disclosed24 Jul 2026

Introduced: 24 Jul 2026

NewCVE-2026-56392  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

There is no fixed version for Centos:6 coreutils-libs.

NVD Description

Note: Versions mentioned in the description apply only to the upstream coreutils-libs package and not the coreutils-libs package as distributed by Centos. See How to fix? for Centos:6 relevant fixed versions and status.

GNU coreutils unexpand is vulnerable to a heap-based buffer overflow due to an integer overflow during buffer allocation when processing large tab stop (-t) values. The multiplication used to calculate the allocation size can wrap around, resulting in an undersized buffer. When processing crafted input, subsequent writes exceed the allocated memory, leading to an out‑of‑bounds heap write.

When running GNU coreutils unexpand with attacker-provided large tab stop (-t) arguments, this behavior leads to a crash and potentially achieve a heap write primitive depending on memory layout.

This issue has been fixed in the commit b60a159fdc5bfcf9988d3a4cb6f53abe8ad5d35d

CVSS Base Scores

version 3.1