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Linux KernelOperating system · Linux

CVE-2024-36918

MEDIUM · 5.5 CVSS v3.1 Published 2024-05-30
Fix available
A fix is available. Upgrade to 6.1.91 / 6.6.31 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: bpf: Check bloom filter map value size This patch adds a missing check to bloom filter creating, rejecting values above KMALLOC_MAX_SIZE. This brings the bloom map in line with many other map types. The lack of this protection can cause kernel crashes for value sizes that overflow int's. Such a crash was caught by syzkaller. The next patch adds more guard-rails at a lower level.

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-190

An arithmetic operation produces a value too large for its type and wraps around to an unexpected — often tiny or negative — number. That miscalculated value then drives a memory allocation or a bounds check, opening the door to corruption. The fix is checked arithmetic and validating sizes before they're used.

General guidance for the integer overflow 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:>= 5.16, < 6.1.91>= 6.2, < 6.6.31>= 6.7, < 6.8.10= 6.9

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 6.1.91 / 6.6.31 / 6.8.10 or later
Fixed in 6.1.916.6.316.8.10
Vendor patch git.kernel.org →
Recommended fix High confidence

6.1.91 or later for 6.1.x; 6.6.31 or later for 6.2-6.6.x; 6.8.10 or later for 6.7-6.8.x; 6.9.1 or later for 6.9.x

  1. Identify the current kernel version using 'uname -r' or 'cat /proc/version'
  2. Determine which kernel branch is in use (e.g., 6.1.x, 6.2.x, 6.6.x, 6.7.x, or 6.9.x)
  3. For systems on 6.1.x: upgrade to kernel >= 6.1.91
  4. For systems on 6.2.x: upgrade to kernel >= 6.6.31
  5. For systems on 6.7.x: upgrade to kernel >= 6.8.10
  6. For systems on 6.9.x: upgrade to kernel >= 6.9.1 or later
  7. For systems on 5.16+ but using older branches: upgrade to the earliest fixed version available for that branch
  8. Reboot into the new kernel after upgrade
Caveat Kernel upgrades may require rebooting services; verify hardware/driver compatibility with the new kernel version before production deployment

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-2024-36918 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
  • No spam, self-promotion, credentials, or personal data