CVE-2023-4692

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.54% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 43.1% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-07-21.

Red Hat severity

Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2023-10-25 10:27Z2 YR AGO

Last updated

2026-07-21 05:08Z1 MO AGO

Reserved

2023-08-31

Assigning CNA

redhat

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

• CWE-122Heap-based Buffer OverflowVariant
• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

4b372385335f17a62fea9e9b663e3e46981ae5d13d7764ef4f27dcfdf65feaaf

• access.redhat.comRHSA-2024:2456https://access.redhat.com/errata/RHSA-2024:2456vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2024:3184https://access.redhat.com/errata/RHSA-2024:3184vendor-advisoryx_refsource_REDHAT
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2023-4692vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2236613https://bugzilla.redhat.com/show_bug.cgi?id=2236613issue-trackingx_refsource_REDHAT
• dfir.ruhttps://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/
• lists.gnu.orghttps://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.html
• seclists.orghttps://seclists.org/oss-sec/2023/q4/37
• lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FUU42E7CPYLATXOYVYNW6YTXXULAOV6L/
• lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OIRJ5UZRXX2KLR4IKBJEQUNGOCXMMDLY/
• lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PERFILCHFEUGG3OAMC6W55P6DDIBZK4Q/
• security.gentoo.orghttps://security.gentoo.org/glsa/202311-14
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20231208-0002/
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2023/10/msg00007.html