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CVE-2023-4806

23
FAUCET Score

CVE-2023-4806 is a glibc flaw affecting fedoraproject, gnu, and redhat products, where the getaddrinfo function can, in rare circumstances, access freed memory, leading to an application crash. This medium-severity vulnerability (CVSS 5.9) requires a highly specific configuration of NSS modules and getaddrinfo flags for exploitation, making it difficult to trigger. There is no evidence of active exploitation, public exploit code, or significant community discussion, indicating a low immediate threat.

Impacted Technologies

VendorProductVersion(s)CPE
2.33CPE matchmatch criteria
cpe:2.3:a:gnu:glibc:2.33:*:*:*:*:*:*:*
9.2CPE matchmatch criteria
cpe:2.3:a:redhat:codeready_linux_builder_eus:9.2:*:*:*:*:*:*:*
9.0_ppc64leCPE matchmatch criteria
cpe:2.3:a:redhat:codeready_linux_builder_eus_for_power_little_endian:9.0_ppc64le:*:*:*:*:*:*:*
9.2_ppc64leCPE matchmatch criteria
cpe:2.3:a:redhat:codeready_linux_builder_eus_for_power_little_endian_eus:9.2_ppc64le:*:*:*:*:*:*:*
9.0_aarch64CPE matchmatch criteria
cpe:2.3:a:redhat:codeready_linux_builder_for_arm64:9.0_aarch64:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.44%
Probability of exploitation in next 30 days
EPSS Percentile
70.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0144 is in the 42nd percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (13)

denopatch availablevia llm_extracted
View patch
keraspatch availablevia llm_extracted
View patch
microsoftpatch availablevia msrc
Product: 19587-17084Fixed in: 2.38-11
microsoftpatch availablevia msrc
Product: 18306-16823Fixed in: 2.35-6
microsoftpatch availablevia msrc
Product: azl3 glibc 2.38-11 on Azure Linux 3.0Fixed in: 2.38-11
microsoftpatch availablevia msrc
Product: cbl2 glibc 2.35-6 on CBL Mariner 2.0Fixed in: 2.35-6
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: glibc-0:2.28-189.8.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: glibc-0:2.34-100.el9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: glibc-0:2.34-60.el9_2.7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 8Fixed in: glibc-0:2.28-189.8.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: glibc-0:2.28-225.el8_8.6
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: compat-glibc
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: glibc

Vendor Advisories (4)

denollm-deno-650ac71876afb4f8CRITICAL

HP ThinPro 8.1 SP 2 Security Updates

Apr 12, 2024
kerasllm-keras-d13bbd8768a57997CRITICAL

HP ThinPro 8.1 SP 2 Security Updates

Apr 12, 2024
microsoft2023-Sep/CVE-2023-4806Moderate

Glibc: potential use-after-free in getaddrinfo()

Sep 12, 2023
redhatCVE-2023-4806Moderate

glibc: potential use-after-free in getaddrinfo()

Sep 12, 2023

References

cert-portal.siemens.com / productcert/html/ssa-082556.html
cert-portal.siemens.com / productcert/html/ssa-831302.html
lists.fedoraproject.org / archives/list/[email protected]/message/4DBUQRRPB47TC3NJOUIBVWUGFHBJAFDL
lists.fedoraproject.org / archives/list/[email protected]/message/DFG4P76UHHZEWQ26FWBXG76N2QLKKPZA
lists.fedoraproject.org / archives/list/[email protected]/message/NDAQWHTSVOCOZ5K6KPIWKRT3JX4RTZUR
security.gentoo.org / glsa/202310-03
security.netapp.com / advisory/ntap-20240125-0008
openwall.com / lists/oss-security/2023/10/03/4
openwall.com / lists/oss-security/2023/10/03/5
openwall.com / lists/oss-security/2023/10/03/6
openwall.com / lists/oss-security/2023/10/03/8
access.redhat.com / errata/RHSA-2023:5453
Third Party Advisory
access.redhat.com / errata/RHSA-2023:5455
Third Party Advisory
access.redhat.com / errata/RHSA-2023:7409
access.redhat.com / security/cve/CVE-2023-4806
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory