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.

Published: 2018-02-01 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-6485 is rated High Risk (74.6/100): CVSS Critical severity, with high exploitation likelihood (EPSS 4.78%, 91th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +3.68% over the last day, indicating growing attacker interest. 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-2018-6485

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 2026-06-15 1.09% 4.78% +3.68%
2 2026-03-01 0.91% 1.09% +0.18%
3 2026-02-14 — 0.91% —

Full EPSS history (22 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-6485

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-2018-6485

OS Trackers for CVE-2018-6485

vendor priority summary link
debian not yet assigned CVE-2018-6485 not yet assigned 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-2018-6485
gentoo normal CVE-2018-6485: 1 GLSA(s) (201804-02), 1 atom(s) (sys-libs/glibc); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2018-6485
redhat medium — https://access.redhat.com/security/cve/CVE-2018-6485
suse medium CVE-2018-6485 severity moderate: SUSE including 510 source package names (0.9.1:glibc-2.22-62.6.2, 1.0.0:glibc-2.22-62.6.2, …), 772 product×package rows across 83 product lines (Container caasp/v4/default-http-backend, Container caasp/v4/dnsmasq-nanny, … (83 product lines)): Fixed 515, Known Affected 157, Known Not Affected 100. https://www.suse.com/security/cve/CVE-2018-6485/
ubuntu medium CVE-2018-6485 medium priority: Ubuntu including 2 source packages (eglibc, glibc), 18 status rows across 9 suites (artful, bionic, cosmic, disco, eoan, focal, trusty, upstream, xenial): DNE 8, not-affected 5, released 3, ignored 1, needs-triage 1. https://ubuntu.com/security/CVE-2018-6485

Affected software / configurations for CVE-2018-6485

Vendor Product Version Raw CPE
gnu glibc <= 2.26 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 cloud_backup — cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
netapp data_ontap_edge — cpe:2.3:a:netapp:data_ontap_edge:-:*:*:*:*:*:*:*
netapp element_software — cpe:2.3:a:netapp:element_software:-:*:*:*:*:*:*:*
netapp element_software_management — cpe:2.3:a:netapp:element_software_management:-:*:*:*:*:*:*:*
netapp steelstore_cloud_integrated_storage — cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:*
netapp storage_replication_adapter >= 7.2 cpe:2.3:a:netapp:storage_replication_adapter:*:*:*:*:*:*:*:*
netapp vasa_provider >= 7.2 cpe:2.3:a:netapp:vasa_provider:*:*:*:*:*:clustered_data_ontap:*:*
netapp vasa_provider 6.x cpe:2.3:a:netapp:vasa_provider:6.x:*:*:*:*:clustered_data_ontap:*:*
netapp virtual_storage_console >= 7.2 cpe:2.3:a:netapp:virtual_storage_console:*:*:*:*:*:vmware_vsphere:*:*
netapp virtual_storage_console — cpe:2.3:a:netapp:virtual_storage_console:-:*:*:*:*:*:*:*

References for CVE-2018-6485

cvelogic Threat Intelligence