No exploitation reportedFix available

CVE-2018-11236

No exploitation reported by the sources we read.

Published2018-05-18
WeaknessCWE-190 · CWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2018-05-1816:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-11236?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-11236?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Oracle communications session border controller

Branch	Affected	Fixed in	Source
8.0	= 8.0.0	no fix published	NVD
8.1	= 8.1.0	no fix published	NVD
8.2	= 8.2.0	no fix published	NVD

Oracle enterprise communications broker

Branch	Affected	Fixed in	Source
3.0	= 3.0.0	no fix published	NVD
3.1	= 3.1.0	no fix published	NVD

Gnu glibc

Branch	Affected	Fixed in	Source
2.27	≤ 2.27	no fix published	NVD

6 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

access.redhat.comPatch
www.oracle.comPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.09.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
NVDweakness (CWE)CWE-190, CWE-787read 2026-10-23
FIRST EPSSEPSS score7.1 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2018-05-18
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2018-11236?

Is CVE-2018-11236 actively exploited?

Active exploitation of CVE-2018-11236 has not been confirmed. Its EPSS score was 7.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-11236?

CVE-2018-11236 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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