All vulnerabilities

Servers and applications

CVE-2018-11236

stdlib/canonicalize.c in the GNU C Library (aka glibc or libc6) 2.27 and earlier, when processing very long pathname arguments to the realpath function, could encounter an integer overflow on 32-bit architectures, leading to a stack-based buffer overflow and, potentially, arbitrary code execution.

Severity
Critical 9.8
Published
18 May 2018
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
6.9% in the next 30 daysHigher than 94% of CVEs. EPSS by FIRST, 10 Nov 2026
Weakness
Integer overflow (CWE-190)Out-of-bounds write (CWE-787)
Attack
Over the network · No login needed · No user action needed
Attacker can
Read data · Change data · Take it down
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Sources
NVD

Affected software

SoftwareAffected versions
GNU C LibraryServers and applications · cpe:a:gnu:glibc
  • Every version up to 2.27

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-11236
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-11236