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NVD / CVE Program· CNA mitre

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.

HighCVSS 8.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 35/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.72% (FIRST EPSS); higher than 54.5% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: azl3 grub2 2.06-24 on Azure Linux 3.0 2.06-25; azl3 grub2 2.06-25 on Azure Linux 3.0 2.06-25; cbl2 grub2 2.06-14 on CBL Mariner 2.0 2.06-15.

Low priority for now. Upgrade to azl3 grub2 2.06-24 on Azure Linux 3.0 2.06-25; azl3 grub2 2.06-25 on Azure Linux 3.0 2.06-25; cbl2 grub2 2.06-14 on CBL Mariner 2.0 2.06-15 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Published
Dec 29, 2024
Updated
Jun 17, 2026
EPSS
0.7% · 54th percentile

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.7%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-56737

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
gnugrub2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (mitre). Independent of NVD's CPE analysis and usually ahead of it.

  • GNU GRUB2

    • 2.00 and later · up to and including 2.12affected

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • gnu grub2up to 2.12 inclusive

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12grub2from 0—
Debian:13grub2before 2.12-62.12-6
openSUSE:Leap 15.6grub2before 2.12-150600.8.18.22.12-150600.8.18.2
openSUSE:Tumbleweedgrub2before 2.12-35.12.12-35.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSgrub2before 2.04-150300.22.52.32.04-150300.22.52.3
SUSE:Linux Enterprise Micro 5.1grub2before 2.04-150300.3.11.12.04-150300.3.11.1
SUSE:Linux Enterprise Micro 5.3grub2before 2.06-150400.11.55.22.06-150400.11.55.2
SUSE:Linux Enterprise Micro 5.5grub2before 2.06-150500.29.43.22.06-150500.29.43.2
SUSE:Linux Enterprise Module for Basesystem 15 SP6grub2before 2.12-150600.8.18.22.12-150600.8.18.2
SUSE:Linux Enterprise Server 12 SP5-LTSSgrub2before 2.02-181.22.02-181.2
SUSE:Linux Micro 6.0grub2before 2.12~rc1-6.12.12~rc1-6.1
SUSE:Linux Micro 6.1grub2before 2.12-slfo.1.1_2.12.12-slfo.1.1_2.1

Same product

gnu: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-2601A buffer overflow was found in grub_font_construct_glyph().
    34Monitor
  • CVE-2020-10713A flaw was found in grub2, prior to version 2.06.
    33Monitor
  • CVE-2022-28733Integer underflow in grub_net_recv_ip4_packets
    32Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2024-1048Feb 6, 2024 · Grub2: grub2-set-bootflag can be abused by local (pseudo-)users
    13Monitor
  • ← EarlierCVE-2024-2312Apr 5, 2024 · GRUB2 does not call the module fini functions on exit, leading to Debian/Ubuntu's peimage GRUB2 module leaving UEFI system table hooks…
    26Monitor
  • Later →CVE-2024-56738Dec 29, 2024 · GNU GRUB (aka GRUB2) through 2.12 does not use a constant-time algorithm for grub_crypto_memcmp and thus allows side-channel attacks.
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
azl3 grub2 2.06-24 on Azure Linux 3.02.06-25 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 grub2 2.06-25 on Azure Linux 3.02.06-25 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 grub2 2.06-14 on CBL Mariner 2.02.06-15 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 grub2 2.06-15 on CBL Mariner 2.02.06-15 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 grub2 2.06-15 on CBL-Mariner 2.02.06-15 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:grub22.12-6 · Debian:13Package registry (OSV)
opensuse:grub22.12-150600.8.18.2 · openSUSE:Leap 15.6Package registry (OSV)
suse:grub22.04-150300.3.11.1 · SUSE:Linux Enterprise Micro 5.1Package registry (OSV)
suse:grub22.12-150600.8.18.2 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2023-4692431 days apartGrub2: out-of-bounds write at fs/ntfs.c may lead to unsigned code execution
    31Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-122 · Heap-based Buffer Overflow

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records