CVE-2024-56738

MEDIUM
Published Dec 29, 2024 Modified Jun 24, 2025 CWE-208 CWE-203

Description

GNU GRUB (aka GRUB2) through 2.12 does not use a constant-time algorithm for grub_crypto_memcmp and thus allows side-channel attacks.

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CVSS v3.1 Score

5.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness Type (CWE)

CWE-208 CWE-208
CWE-203 CWE-203

Affected Products

Vendor Product
gnu grub2

References

Frequently Asked Questions

What is CVE-2024-56738? +
GNU GRUB (aka GRUB2) through 2.12 does not use a constant-time algorithm for grub_crypto_memcmp and thus allows side-channel attacks. It has a CVSS v3.1 base score of 5.3 (MEDIUM).
How severe is CVE-2024-56738? +
CVE-2024-56738 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2024-56738? +
CVE-2024-56738 affects products from gnu, specifically: grub2. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-56738? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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