CVE-2024-56737

GNU GRUB (aka GRUB2) through 2.12 has a heap-based buffer overflow in fs/hfs.c via crafted sblock data in an HFS filesystem.

Published: 2024-12-29 Last update: 2025-06-24 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-56737 is rated Moderate Risk (52.7/100): CVSS High severity, with low exploitation likelihood (EPSS 0.71%). Review affected assets and schedule 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-2024-56737

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 0.20% 0.71% +0.51%
2 2026-05-20 0.15% 0.20% +0.05%
3 2026-03-09 — 0.15% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-56737

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
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.
 2.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2024-56737

OS Trackers for CVE-2024-56737

vendor priority summary link
debian not yet assigned CVE-2024-56737 not yet assigned priority: Debian including 1 source packages (grub2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 3, open 2. https://security-tracker.debian.org/tracker/CVE-2024-56737
redhat medium — https://access.redhat.com/security/cve/CVE-2024-56737
suse high CVE-2024-56737 severity important: SUSE including 389 source package names (2.0.4-5.8.146:grub2-2.06-150500.29.43.2, 2.0.4-5.8.146:grub2-i386-pc-2.06-150500.29.43.2, …), 1420 product×package rows across 292 product lines (Container suse/manager/5.0/x86_64/server, Container suse/sl-micro/6.0/base-os-container, … (292 product lines)): Fixed 1199, Known Affected 221. https://www.suse.com/security/cve/CVE-2024-56737/
ubuntu medium CVE-2024-56737 medium priority: Ubuntu including 3 source packages (grub2, grub2-signed, grub2-unsigned), 29 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): needs-triage 15, not-affected 8, ignored 6. https://ubuntu.com/security/CVE-2024-56737

Affected software / configurations for CVE-2024-56737

Vendor Product Version Raw CPE
gnu grub2 <= 2.12 cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:*

References for CVE-2024-56737

URL Tags
https://savannah.gnu.org/bugs/?66599 Issue Tracking Third Party Advisory
cvelogic Threat Intelligence