HIGHCVSS v3.1 7.8Actively exploited · CISA KEV since 2023-11-21Vulnerability

CVE-2023-4911

GNU C Library's dynamic loader ld.so contains a buffer overflow vulnerability when processing the GLIBC_TUNABLES environment variable, allowing a local attacker to execute code with elevated privileges.

Properties

Euvd product
Red Hat Enterprise Linux 9, Red Hat Virtualization 4 for Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.0 Extended Update Support, Red Hat Enterprise Linux 8.6 Extended Update Support, Red Hat Enterprise Linux 8
Vulnerability name
GNU C Library Buffer Overflow Vulnerability
First seen
2026-10-14T21:45:37+00:00
Cvss score
7.8
Epss score
0.63769
Last seen
2026-10-19T12:00:27+00:00
Due date
2023-12-12
Euvd assigner
redhat
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2023-11-21T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2023-11-21
Euvd base score version
3.1
Score
7.8
Fetched at
2026-10-20T10:36:20+00:00
Euvd vendor
Red Hat
Cvss vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
In Signal since
initial import (Sep 2026)
Euvd base score
7.8

Related Entities (88 · showing 25)

AFFECTS_PRODUCT (83 · showing 20)

→[Product]cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:9.4_ppc64le:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:9.0_ppc64le:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:redhat:enterprise_linux_update_services_for_sap_solutions:9.6:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus_s390x:8.6:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:9.6_s390x:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.6_ppc64le:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:redhat:enterprise_linux_server_aus:8.6:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.2_ppc64le:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:redhat:enterprise_linux_server_aus:9.6:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:redhat:enterprise_linux_update_services_for_sap_solutions:9.2:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:9.6_ppc64le:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:9.2_ppc64le:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:canonical:ubuntu_linux:22.04:*:*:*:lts:*:*:*
→[Product]cpe:2.3:o:canonical:ubuntu_linux:23.04:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*

HAS_WEAKNESS (2)

→[Weakness]Out-of-bounds Write
→[Weakness]Heap-based Buffer Overflow

DESCRIBES (1)

←[KEVEntry]GNU C Library Buffer Overflow Vulnerability

INVOLVES (1)

←[Signal]kev_added · 2023-11-21

MENTIONED_IN (1)

→[Campaign]EtherHiding Exposed: Inside a Blockchain-powered Malware Campaign Hiding in Plain Sight

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CVE-2023-4911 (CVSS v3.1 7.8) — Ninja Signal Threat Intelligence | Ninja Signal