CVE-2022-49698

HIGH EPSS 20.0%
Published Feb 26, 20251y ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
20.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel*≥4.18  –  <5.10.127
linuxlinux_kernel*≥5.11  –  <5.15.51
linuxlinux_kernel*≥5.16  –  <5.18.8
linuxlinux_kernel5.19any
linuxlinux_kernel5.19any
linuxlinux_kernel5.19any

References 4

  • git.kernel.org https://git.kernel.org/stable/c/15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6ce71f83f798be7e1ca68707fec449fbecb38852
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b1fd94e704571f98b21027340eecf821b2bdffba
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d0906b0fffc9f19bc42708ca3e84e2089088386c
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6ce71f83f798be7e1ca68707fec449fbecb38852
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b1fd94e704571f98b21027340eecf821b2bdffba
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d0906b0fffc9f19bc42708ca3e84e2089088386c
    Patch