CVEvulnerability

CVE-2021-47567

5.5 MEDIUM Published 2024-05-24 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2024-05-24
Last modified
2026-06-17
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Description

In the Linux kernel, the following vulnerability has been resolved: powerpc/32: Fix hardlockup on vmap stack overflow Since the commit c118c7303ad5 ("powerpc/32: Fix vmap stack - Do not activate MMU before reading task struct") a vmap stack overflow results in a hard lockup. This is because emergency_ctx is still addressed with its virtual address allthough data MMU is not active anymore at that time. Fix it by using a physical address instead.

Affected configurations

• linux linux kernel (>= 5.9.5 < 5.10.83) • linux linux kernel (>= 5.11 < 5.15.6) • linux linux kernel 5.16

References