CVE-2024-36883

Kernel memory corruption via network namespace race

Published May 30, 2024 · Updated Aug 5, 2026

Out-of-bounds access in the Linux kernel allows local users to corrupt kernel memory by racing network-namespace creation. In net_alloc_generic, unlocked reads of max_gen_ptrs separately size the allocation and its bounds, so concurrent per-network registration can make s.len exceed the allocated array. Reaching the race requires the ability to create network namespaces and trigger per-network operation registration; success can disclose heap data, overwrite adjacent objects, or panic the kernel.

CVSS severity7.8
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in the Linux kernel allows local users to corrupt kernel memory by racing network-namespace creation. In net_alloc_generic, unlocked reads of max_gen_ptrs separately size the allocation and its bounds, so concurrent per-network registration can make s.len exceed the allocated array. Reaching the race requires the ability to create network namespaces and trigger per-network operation registration; success can disclose heap data, overwrite adjacent objects, or panic the kernel.

The record

CVE
CVE-2024-36883
Published
May 30, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 30, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=073862ba5d249c20bd5c49fc6d904ff0e1f6a672 <0c3248bc708a7797be573214065cf908ff1f54c7
  2. Affected versionversion=073862ba5d249c20bd5c49fc6d904ff0e1f6a672 <2d60ff5874aefd006717ca5e22ac1e25eac29c42
  3. Affected versionversion=073862ba5d249c20bd5c49fc6d904ff0e1f6a672 <3cdc34d76c4f777579e28ad373979d36c030cfd3
  4. Affected versionversion=073862ba5d249c20bd5c49fc6d904ff0e1f6a672 <7b0e64583eab8c1d896b47e5dd0bf2e7d86ec41f
  5. Affected versionversion=073862ba5d249c20bd5c49fc6d904ff0e1f6a672 <9518b79bfd2fbf99fa9b7e8e36bcb1825e7ba030
  6. Affected versionversion=073862ba5d249c20bd5c49fc6d904ff0e1f6a672 <a26ff37e624d12e28077e5b24d2b264f62764ad6
  7. Affected versionversion=073862ba5d249c20bd5c49fc6d904ff0e1f6a672 <b6dbfd5bcc267a95a0bf1bf96af46243f96ec6cd
  8. Affected versionversion=073862ba5d249c20bd5c49fc6d904ff0e1f6a672 <f4f94587e1bf87cb40ec33955a9d90148dd026ab
  9. Affected versionversion=3.0.19 <3.1
  10. Affected versionversion=3.2.3 <3.3
  11. Affected versionversion=3.3
  12. Affected versionversion=561331eae0a03d0c4cf60f3cf485aa3e8aa5ab48
  13. Affected versionversion=a2c82f7bee1ffa9eafa1fb0bd886a7eea8c9e497

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=073862ba5d249c20bd5c49fc6d904ff0e1f6a672 <0c3248bc708a7797be573214065cf908ff1f54c7; version=073862ba5d249c20bd5c49fc6d904ff0e1f6a672 <2d60ff5874aefd006717ca5e22ac1e25eac29c42; version=073862ba5d249c20bd5c49fc6d904ff0e1f6a672 <3cdc34d76c4f777579e28ad373979d36c030cfd3; version=073862ba5d249c20bd5c49fc6d904ff0e1f6a672 <7b0e64583eab8c1d896b47e5dd0bf2e7d86ec41f; version=073862ba5d249c20bd5c49fc6d904ff0e1f6a672 <9518b79bfd2fbf99fa9b7e8e36bcb1825e7ba030; version=073862ba5d249c20bd5c49fc6d904ff0e1f6a672 <a26ff37e624d12e28077e5b24d2b264f62764ad6; version=073862ba5d249c20bd5c49fc6d904ff0e1f6a672 <b6dbfd5bcc267a95a0bf1bf96af46243f96ec6cd; version=073862ba5d249c20bd5c49fc6d904ff0e1f6a672 <f4f94587e1bf87cb40ec33955a9d90148dd026ab; version=3.0.19 <3.1; version=3.2.3 <3.3; version=3.3; version=561331eae0a03d0c4cf60f3cf485aa3e8aa5ab48; version=a2c82f7bee1ffa9eafa1fb0bd886a7eea8c9e497

Published CVSS scores

7.8Linux CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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