CVE-2024-36883: Linux kernel · net: fix out-of-bounds access in ops_init
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 7.8 High · fixed in 5.4.0-1130.140~18.04.1 : patch Linux kernel soon.
Data as of 28 Oct 2026, 10:59 UTC
- Patch
- Available – fixed in 5.4.0-1130.140~18.04.1, 5.4.0-1135.142~18.04.1, 5.4.0-1134.143~18.04.1 +73
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 30 May 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Patches and advisories
- ubuntu.com/security/notices/USN-6949-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6950-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6951-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6952-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6953-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6955-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6956-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6957-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6950-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-6950-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-6949-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-6952-2 (opens in a new tab)
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 24.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-ibmpkg:deb/ubuntu/linux-ibm?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
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.
References
- ubuntu.com/security/CVE-2024-36883 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2024-36883 (opens in a new tab)
- git.kernel.org/linus/a26ff37e624d12e28077e5b24d2b264f62764ad6 (opens in a new tab)
- git.kernel.org/stable/c/3cdc34d76c4f777579e28ad373979d36c030cfd3 (opens in a new tab)
- git.kernel.org/stable/c/7b0e64583eab8c1d896b47e5dd0bf2e7d86ec41f (opens in a new tab)
- git.kernel.org/stable/c/0c3248bc708a7797be573214065cf908ff1f54c7 (opens in a new tab)
- git.kernel.org/stable/c/9518b79bfd2fbf99fa9b7e8e36bcb1825e7ba030 (opens in a new tab)
- git.kernel.org/stable/c/2d60ff5874aefd006717ca5e22ac1e25eac29c42 (opens in a new tab)
- git.kernel.org/stable/c/b6dbfd5bcc267a95a0bf1bf96af46243f96ec6cd (opens in a new tab)
- git.kernel.org/stable/c/f4f94587e1bf87cb40ec33955a9d90148dd026ab (opens in a new tab)
- git.kernel.org/stable/c/a26ff37e624d12e28077e5b24d2b264f62764ad6 (opens in a new tab)
- ubuntu.com/security/notices/USN-6949-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6950-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6951-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6952-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6953-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6955-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6956-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6957-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6950-2 (opens in a new tab)