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.

Published: 2018-05-18 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-11236 is rated High Risk (65.7/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.89%). High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-11236

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-21 0.97% 0.89% -0.07%
2 2026-03-16 0.89% 0.97% +0.07%
3 2025-11-21 — 0.89% —

Full EPSS history (27 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-11236

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2018-11236

OS Trackers for CVE-2018-11236

vendor priority summary link
debian low CVE-2018-11236 low priority: Debian including 1 source packages (glibc), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-11236
redhat medium — https://access.redhat.com/security/cve/CVE-2018-11236
suse high CVE-2018-11236 severity important: SUSE including 581 source package names (0.1.0:glibc-2.26-13.3.1, 0.1.75:glibc-2.26-13.3.1, …), 925 product×package rows across 152 product lines (Container caasp/v4/389-ds, Container caasp/v4/busybox, … (152 product lines)): Fixed 694, Known Affected 157, Known Not Affected 74. https://www.suse.com/security/cve/CVE-2018-11236/
ubuntu medium CVE-2018-11236 medium priority: Ubuntu including 2 source packages (eglibc, glibc), 34 status rows across 17 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, trusty, upstream, xenial): DNE 16, not-affected 12, released 4, ignored 1, needs-triage 1. https://ubuntu.com/security/CVE-2018-11236

Affected software / configurations for CVE-2018-11236

Vendor Product Version Raw CPE
gnu glibc <= 2.27 cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*
redhat virtualization_host 4.0 cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 7.0 cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_server 7.0 cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 7.0 cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
oracle communications_session_border_controller 8.0.0 cpe:2.3:a:oracle:communications_session_border_controller:8.0.0:*:*:*:*:*:*:*
oracle communications_session_border_controller 8.1.0 cpe:2.3:a:oracle:communications_session_border_controller:8.1.0:*:*:*:*:*:*:*
oracle communications_session_border_controller 8.2.0 cpe:2.3:a:oracle:communications_session_border_controller:8.2.0:*:*:*:*:*:*:*
oracle enterprise_communications_broker 3.0.0 cpe:2.3:a:oracle:enterprise_communications_broker:3.0.0:*:*:*:*:*:*:*
oracle enterprise_communications_broker 3.1.0 cpe:2.3:a:oracle:enterprise_communications_broker:3.1.0:*:*:*:*:*:*:*
netapp data_ontap_edge — cpe:2.3:a:netapp:data_ontap_edge:-:*:*:*:*:*:*:*
netapp element_software_management — cpe:2.3:a:netapp:element_software_management:-:*:*:*:*:*:*:*

References for CVE-2018-11236

cvelogic Threat Intelligence