How severe is CVE-2024-56737?

CVE-2024-56737 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-56737 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-56737?

CVE-2024-56737 affects Gnu Grub2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-56737?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-56737 have an EU (EUVD) identifier?

Yes. CVE-2024-56737 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-53380.

When was CVE-2024-56737 published?

CVE-2024-56737 was published on 2024-12-29 and last updated on 2026-06-17.

CVE-2024-56737

CVE-2024-56737 is a high-severity vulnerability in Gnu Grub2 with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-53380
Weakness: CWE-122
Affected product: Gnu Grub2
Published: 2024-12-29
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2024-56737?: CVE-2024-56737 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-56737 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-56737?: CVE-2024-56737 affects Gnu Grub2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-56737?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-56737 have an EU (EUVD) identifier?: Yes. CVE-2024-56737 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-53380.
When was CVE-2024-56737 published?: CVE-2024-56737 was published on 2024-12-29 and last updated on 2026-06-17.

References

https://savannah.gnu.org/bugs/?66599

Affected products (1)

cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:*

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