CVE-2023-4693

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.50% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 40.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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 05:09Z1 MO AGO

Reserved

2023-08-31

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

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

Weaknesses

• CWE-125Out-of-bounds ReadBase

Data version

5.2

Document digest

d26bcfa055e2ab37f00e3188c74a5b6992c46f6a10beeb959e60b368d4372b64

• 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-2023-4693vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2238343https://bugzilla.redhat.com/show_bug.cgi?id=2238343issue-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