VULNERABILITY INTELLIGENCE

CVE-2017-17426

CVSS score8.1 HIGH
EPSS probability1.60%
CISA KEVNot currently listed
Published2017-12-05
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.

Weakness classification

  • CWE-190: Integer Overflow or Wraparound

Primary references