CVE-2022-49698
- 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
- 2026-04-11T12:44:23.937927Z
- 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
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49698.json" }- References
-
- https://git.kernel.org/stable/c/15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b
- https://git.kernel.org/stable/c/6ce71f83f798be7e1ca68707fec449fbecb38852
- https://git.kernel.org/stable/c/b1fd94e704571f98b21027340eecf821b2bdffba
- https://git.kernel.org/stable/c/d0906b0fffc9f19bc42708ca3e84e2089088386c
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49698.json
- https://nvd.nist.gov/vuln/detail/CVE-2022-49698
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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
-
Introduced978d8f9055c3a7c35db2ac99cd2580b993396e33Fixed15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783bFixedd0906b0fffc9f19bc42708ca3e84e2089088386cFixed6ce71f83f798be7e1ca68707fec449fbecb38852Fixedb1fd94e704571f98b21027340eecf821b2bdffba