CVE-2024-36883

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Source
https://cve.org/CVERecord?id=CVE-2024-36883
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-36883.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-36883
Downstream
Related
Published
2024-05-30T15:28:53.302Z
Modified
2026-05-15T11:54:25.068872536Z
Summary
net: fix out-of-bounds access in ops_init
Details

In the Linux kernel, the following vulnerability has been resolved:

net: fix out-of-bounds access in ops_init

netallocgeneric is called by netalloc, which is called without any locking. It reads maxgenptrs, which is changed under pernetops_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 maxgenptrs, which is then used to set s.len with a larger than allocated length for the variable array.

Fix it by reading maxgenptrs only once in netallocgeneric. If maxgenptrs is later incremented, it will be caught in netassigngeneric.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/36xxx/CVE-2024-36883.json"
}
References

Affected packages

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
3.3.0
Fixed
4.19.314
Type
ECOSYSTEM
Events
Introduced
4.20.0
Fixed
5.4.276
Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.10.217
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.159
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.91
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.31
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.8.10

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-36883.json"