CVE-2022-49698

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Source
https://cve.org/CVERecord?id=CVE-2022-49698
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49698.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-49698
Downstream
Published
2025-02-26T02:24:19.519Z
Modified
2026-03-20T12:24:45.121305Z
Summary
netfilter: use get_random_u32 instead of prandom
Details

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

netfilter: use getrandomu32 instead of prandom

bh might occur while updating per-cpu rndstate from user context, ie. localout path.

BUG: using smpprocessorid() in preemptible [00000000] code: nginx/2725 caller is nftngrandomeval+0x24/0x54 [nftnumgen] Call Trace: checkpreemptiondisabled+0xde/0xe0 nftngrandomeval+0x24/0x54 [nftnumgen]

Use the random driver instead, this also avoids need for local prandom state. Moreover, prandom now uses the random driver since d4150779e60f ("random32: use real rng for non-deterministic randomness").

Based on earlier patch from Pablo Neira.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49698.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
978d8f9055c3a7c35db2ac99cd2580b993396e33
Fixed
15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b
Fixed
d0906b0fffc9f19bc42708ca3e84e2089088386c
Fixed
6ce71f83f798be7e1ca68707fec449fbecb38852
Fixed
b1fd94e704571f98b21027340eecf821b2bdffba

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49698.json"