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Linux KernelOperating system · Linux

CVE-2024-35800

MEDIUM · 5.5 CVSS v3.1 Published 2024-05-17
Fix available
A fix is available. Upgrade to 6.1.84 / 6.6.24 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In the Linux kernel, the following vulnerability has been resolved: efi: fix panic in kdump kernel Check if get_next_variable() is actually valid pointer before calling it. In kdump kernel this method is set to NULL that causes panic during the kexec-ed kernel boot. Tested with QEMU and OVMF firmware.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-476

The code follows a pointer that is null, crashing the process. An attacker who can reliably trigger it turns the crash into a denial of service. The fix is checking for null before use and handling the failure path gracefully.

General guidance for the null pointer dereference class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 6.1.81, < 6.1.84>= 6.3, < 6.6.24>= 6.7, < 6.7.12>= 6.8, < 6.8.3

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 6.1.84 / 6.6.24 / 6.7.12 or later
Fixed in 6.1.846.6.246.7.12
Vendor patch git.kernel.org →
Recommended fix High confidence

Linux kernel 6.1.84, 6.6.24, 6.7.12, or 6.8.3 (or later stable versions in each respective branch)

  1. Identify the currently running kernel version using `uname -r`
  2. Determine which minor version branch your kernel comes from (e.g., 6.1.x, 6.6.x, 6.7.x, 6.8.x)
  3. Upgrade the Linux kernel to the first fixed version in your branch: for 6.1.x upgrade to 6.1.84+, for 6.3.x-6.5.x upgrade to 6.6.24+, for 6.7.x upgrade to 6.7.12+, for 6.8.x upgrade to 6.8.3+
  4. After kernel upgrade, reboot the system to load the fixed kernel
  5. For kdump kernels specifically, verify the fix is applied by ensuring get_next_variable() is properly checked before use in the EFI runtime services code
Caveat Kernel upgrades may introduce compatibility changes with third-party modules or specific hardware drivers; ensure all proprietary drivers are compatible with the target kernel version before upgrading production systems

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $2,850. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-35800 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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