CVE-2021-47567
powerpc/32: Fix hardlockup on vmap stack overflow
Vexday Risk Score
3Bajo
Decisión SSVC (CISA)
Track
Sin señal de explotación → monitorear
CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Ciclo de vida
24 may 2024Publicada en NVD
Recomendación: Monitorear — sin señal de explotación por ahora.
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.
Productos afectados
Linux · Linux