CVE-2022-49698
netfilter: use get_random_u32 instead of prandom
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: use get_random_u32 instead of prandom bh might occur while updating per-cpu rnd_state from user context, ie. local_out path. BUG: using smp_processor_id() in preemptible [00000000] code: nginx/2725 caller is nft_ng_random_eval+0x24/0x54 [nft_numgen] Call Trace: check_preemption_disabled+0xde/0xe0 nft_ng_random_eval+0x24/0x54 [nft_numgen] 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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.30% · top 78% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 978d8f9055c3a7c35db2ac99cd2580b993396e33 – < 15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b
- affected 978d8f9055c3a7c35db2ac99cd2580b993396e33 – < d0906b0fffc9f19bc42708ca3e84e2089088386c
- affected 978d8f9055c3a7c35db2ac99cd2580b993396e33 – < 6ce71f83f798be7e1ca68707fec449fbecb38852
- affected 978d8f9055c3a7c35db2ac99cd2580b993396e33 – < b1fd94e704571f98b21027340eecf821b2bdffba
- affected 4.18
- unaffected < 4.18
- unaffected 5.10.127 – ≤ 5.10.*
- unaffected 5.15.51 – ≤ 5.15.*
- unaffected 5.18.8 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References (4)
- https://git.kernel.org/stable/c/15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b (opens in a new tab)
- https://git.kernel.org/stable/c/d0906b0fffc9f19bc42708ca3e84e2089088386c (opens in a new tab)
- https://git.kernel.org/stable/c/6ce71f83f798be7e1ca68707fec449fbecb38852 (opens in a new tab)
- https://git.kernel.org/stable/c/b1fd94e704571f98b21027340eecf821b2bdffba (opens in a new tab)
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)
- 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
[](https://trackcve.app/cve/CVE-2022-49698)Record last updated .