What is CVE-2021-47567?

CVE-2021-47567 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2024-05-24.

How severe is CVE-2021-47567?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2021-47567 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Linux

CVE-2021-47567

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.

EPSS: 0.002 (13.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions 5.16, 5.10.83, 5.10
Linux Linux_kernel — versions 5.16

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2021-47567?: CVE-2021-47567 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2024-05-24.
How severe is CVE-2021-47567?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2021-47567 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.