IM
IronMonkey Threat Research

CVE-2022-39188 MEDIUM

Published: 2022-09-02 | Last Modified: 2024-11-21 | Status: Modified

Description

An issue was discovered in include/asm-generic/tlb.h in the Linux kernel before 5.19. Because of a race condition (unmap_mapping_range versus munmap), a device driver can free a page while it still has stale TLB entries. This only occurs in situations with VM_PFNMAP VMAs.

Additional Descriptions (1)

Se ha detectado un problema en el archivo include/asm-generic/tlb.h en el kernel de Linux versiones anteriores a 5.19. Debido a una condición de carrera (unmap_mapping_range frente a munmap), un controlador de dispositivo puede liberar una página mientras todavía presenta entradas de TLB antiguas. Esto sólo ocurre en situaciones con VM_PFNMAP VMAs

CVSS Metrics

Base Score: 4.7 (MEDIUM)

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack VectorLOCAL
Attack ComplexityHIGH
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
Confidentiality ImpactNONE
Integrity ImpactNONE
Availability ImpactHIGH

Source: [email protected]

Type: Primary

Exploitability Score: 1.0

Impact Score: 3.6

Weaknesses

Source Type Description
[email protected] Primary
en CWE-362

Affected Products

Vendor Product Version Update Type
linux linux_kernel * <built-in method update of dict object at 0x7fd369ad7c40> Operating System
debian debian_linux 10.0 <built-in method update of dict object at 0x7fd36a7ef340> Operating System
debian debian_linux 10.0 <built-in method update of dict object at 0x7fd34b994d40> Operating System
debian debian_linux 11.0 <built-in method update of dict object at 0x7fd36a7ecf80> Operating System

Affected Configurations

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Yes cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

References