PT-2024-8981 · Linux+2 · Linux Kernel+2

Christophe Leroy · Published 2024-05-24 · Updated 2024-11-27 · CVE-2021-47567

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: Linux kernel (affected versions not specified)

Description: The issue is related to a hardlockup on vmap stack overflow in the powerpc/32 component of the Linux kernel. This occurs because the emergency ctx is still addressed with its virtual address even though the data MMU is not active anymore at that time. The problem can be fixed by using a physical address instead. The vulnerability may allow an attacker to cause a denial of service.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

BDU:2024-10663

CVE-2021-47567

Affected Products

Astra Linux

Linux Kernel

Red Os

References · 15

• https://git.kernel.org/stable/c/5bb60ea611db1e04814426ed4bd1c95d1487678e · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47567 · Vendor Advisory
• https://git.kernel.org/stable/c/c4e3ff8b8b1d54f0c755670174c453b06e17114b · Patch
• https://osv.dev/vulnerability/CVE-2021-47567 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-47567 · Security Note
• https://git.kernel.org/stable/c/dfe906da9a1abebdebe8b15bb3e66a2578f6c4c7 · Patch
• https://ubuntu.com/security/CVE-2021-47567 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47567 · Vendor Advisory
• https://bdu.fstec.ru/vul/2024-10663 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-47567 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47567 · Security Note
• https://redos.red-soft.ru/support/secure · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/mnozhestvennye-uyazvimosti-kernel-lt-2711242 · Note
• https://lore.kernel.org/linux-cve-announce/2024052453-CVE-2021-47567-b955@gregkh/T/#u · Note
• https://git.kernel.org/linus/5bb60ea611db1e04814426ed4bd1c95d1487678e · Note