CVE-2022-49698

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-49698
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.

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b Patch
https://git.kernel.org/stable/c/6ce71f83f798be7e1ca68707fec449fbecb38852 Patch
https://git.kernel.org/stable/c/b1fd94e704571f98b21027340eecf821b2bdffba Patch
https://git.kernel.org/stable/c/d0906b0fffc9f19bc42708ca3e84e2089088386c Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*
History

24 Oct 2025, 19:11

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: el uso de get_random_u32 en lugar de prandom bh podría ocurrir mientras se actualiza rnd_state por CPU desde el contexto del usuario, es decir, la ruta local_out. ERROR: uso de smp_processor_id() en código preemptible [00000000]: el llamador de nginx/2725 es nft_ng_random_eval+0x24/0x54 [nft_numgen] Rastreo de llamadas: check_preemption_disabled+0xde/0xe0 nft_ng_random_eval+0x24/0x54 [nft_numgen] Use el controlador aleatorio en su lugar, esto también evita la necesidad de un estado prandom local. Además, prandom ahora usa el controlador aleatorio desde d4150779e60f ("random32: use real rng for non-deterministic randomness"). Basado en un parche anterior de Pablo Neira.
References () https://git.kernel.org/stable/c/15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b - () https://git.kernel.org/stable/c/15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b - Patch
References () https://git.kernel.org/stable/c/6ce71f83f798be7e1ca68707fec449fbecb38852 - () https://git.kernel.org/stable/c/6ce71f83f798be7e1ca68707fec449fbecb38852 - Patch
References () https://git.kernel.org/stable/c/b1fd94e704571f98b21027340eecf821b2bdffba - () https://git.kernel.org/stable/c/b1fd94e704571f98b21027340eecf821b2bdffba - Patch
References () https://git.kernel.org/stable/c/d0906b0fffc9f19bc42708ca3e84e2089088386c - () https://git.kernel.org/stable/c/d0906b0fffc9f19bc42708ca3e84e2089088386c - Patch
CPE cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*
CWE NVD-CWE-noinfo
First Time Linux
Linux linux Kernel

26 Feb 2025, 07:01

Type Values Removed Values Added
New CVE
Information

Published : 2025-02-26 07:01

Updated : 2025-10-24 19:11

NVD link : CVE-2022-49698

Mitre link : CVE-2022-49698

CVE.ORG link : CVE-2022-49698

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo