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Linux KernelOperating system · Linux

CVE-2024-36883

HIGH · 7.1 CVSS v3.1 Published 2024-05-30
Fix available
A fix is available. Upgrade to 3.1 / 3.3 or later.
See remediation →
73/100
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: net: fix out-of-bounds access in ops_init net_alloc_generic is called by net_alloc, which is called without any locking. It reads max_gen_ptrs, which is changed under pernet_ops_rwsem. It is read twice, first to allocate an array, then to set s.len, which is later used to limit the bounds of the array access. It is possible that the array is allocated and another thread is registering a new pernet ops, increments max_gen_ptrs, which is then used to set s.len with a larger than allocated length for the variable array. Fix it by reading max_gen_ptrs only once in net_alloc_generic. If max_gen_ptrs is later incremented, it will be caught in net_assign_generic.

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-125

The code reads past the end (or before the start) of a buffer, returning memory that was never meant to be exposed. Attackers use it to leak secrets like keys or to defeat memory-protection defences. Remediation is validating indices and lengths before every read.

General guidance for the out-of-bounds read 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:>= 3.0.19, < 3.1>= 3.2.3, < 3.3>= 3.3.1, < 4.19.314>= 4.20, < 5.4.276>= 5.5, < 5.10.217>= 5.11, < 5.15.159>= 5.16, < 6.1.91>= 6.2, < 6.6.31>= 6.7, < 6.8.10= 3.3= 6.9
Debian LinuxOperating system
Affected:= 10.0

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
High
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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 3.1 / 3.3 / 4.19.314 or later
Fixed in 3.13.34.19.314
Vendor patch git.kernel.org →
Recommended fix High confidence

Linux Kernel >= 4.19.314 or >= 5.4.276; Debian 10.0 should upgrade to a kernel version incorporating the fix (check Debian LTS security tracker)

  1. 1. Identify the current kernel version using 'uname -r'
  2. 2. For Debian 10.0 systems, upgrade the kernel package using the package manager: 'apt update && apt install linux-image-<version>'
  3. 3. Alternatively, for mainline kernels, download and install the fixed version: 4.19.314 or later, or 5.4.276 or later
  4. 4. After installation, reboot the system to load the fixed kernel
  5. 5. Verify the fix is applied by checking 'uname -r' matches the fixed version and confirming the vulnerability is resolved via '/proc/version' or kernel security notices
Caveat Kernel upgrades may require rebuilding third-party kernel modules; ensure compatibility of proprietary drivers with the new 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 $3,200. 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-2024-36883 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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