CVE-2024-36883net: fix out-of-bounds access in ops_init

Description

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.

Timeline

Scores

EPSS (exploitation in 30 days)

0.31% · top 76% of all CVEs (14 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Affected products

• Linux · Linux

  • affected 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 – < 3cdc34d76c4f777579e28ad373979d36c030cfd3
  • affected 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 – < 7b0e64583eab8c1d896b47e5dd0bf2e7d86ec41f
  • affected 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 – < 0c3248bc708a7797be573214065cf908ff1f54c7
  • affected 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 – < 9518b79bfd2fbf99fa9b7e8e36bcb1825e7ba030
  • affected 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 – < 2d60ff5874aefd006717ca5e22ac1e25eac29c42
  • affected 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 – < b6dbfd5bcc267a95a0bf1bf96af46243f96ec6cd
  • affected 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 – < f4f94587e1bf87cb40ec33955a9d90148dd026ab
  • affected 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 – < a26ff37e624d12e28077e5b24d2b264f62764ad6
  • affected 561331eae0a03d0c4cf60f3cf485aa3e8aa5ab48
  • affected a2c82f7bee1ffa9eafa1fb0bd886a7eea8c9e497
  • affected 3.0.19 – < 3.1
  • affected 3.2.3 – < 3.3

• Linux · Linux

  • affected 3.3
  • unaffected < 3.3
  • unaffected 4.19.314 – ≤ 4.19.*
  • unaffected 5.4.276 – ≤ 5.4.*
  • unaffected 5.10.217 – ≤ 5.10.*
  • unaffected 5.15.159 – ≤ 5.15.*
  • unaffected 6.1.91 – ≤ 6.1.*
  • unaffected 6.6.31 – ≤ 6.6.*
  • unaffected 6.8.10 – ≤ 6.8.*
  • unaffected 6.9 – ≤ *

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• EUVD EUVD-2024-36235 (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2024-36883](https://cveledger.app/badge/CVE-2024-36883.svg)](https://cveledger.app/cve/CVE-2024-36883)

Record last updated 5 Aug 2026, 11:31 UTC.