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CVE-2018-6485

An integer overflow in the implementation of the posix_memalign in memalign functions in the GNU C Library (aka glibc or libc6) 2.26 and earlier could cause these functions to return a pointer to a heap area that is too small, potentially leading to heap corruption.

Severity
Critical 9.8
Published
1 Feb 2018
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
4.7% in the next 30 daysHigher than 91% of CVEs. EPSS by FIRST, 11 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 2.26

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-6485
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-6485