PT-2021-7582 · Linux+2 · Linux Kernel+2

Gengjia Chen + 1 · Published 2021-03-03 · Updated 2023-01-20 · CVE-2022-47946

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 versions 5.10.x through 5.10.154

Description The issue is related to a use-after-free in the io sqpoll wait sq function in fs/io uring.c, which allows an attacker to crash the kernel, resulting in denial of service. The finish wait function can be skipped. An attack can occur in some situations by forking a process and then quickly terminating it.

Recommendations For Linux kernel versions 5.10.x through 5.10.154, update to a version after 5.10.155 to resolve the issue. As a temporary workaround, consider restricting the use of the io sqpoll wait sq function in fs/io uring.c to minimize the risk of exploitation. Avoid forking and quickly terminating processes to reduce the likelihood of an attack.

Exploit

Fix

DoS

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALT-PU-2021-1447

ALT-PU-2021-1525

ALT-PU-2021-1869

ALT-PU-2021-1888

ALT-PU-2021-1896

ALT-PU-2022-1240

ALT-PU-2022-1419

ALT-PU-2022-1421

ALT-PU-2022-3180

ALT-PU-2022-3206

ALT-PU-2022-3226

ALT-PU-2022-3285

ALT-PU-2022-3310

ALT-PU-2022-3311

BDU:2023-00159

CVE-2022-47946

OESA-2023-1038

OESA-2023-1039

Affected Products

Alt Linux

Astra Linux

Linux Kernel

References · 24

• 🔥 https://openwall.com/lists/oss-security/2022/12/22/2 · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-47946 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-3424 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-4662 · Security Note
• https://osv.dev/vulnerability/OESA-2023-1038 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-4842 · Security Note
• https://cve.org/CVERecord?id=CVE-2022-47946 · Security Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.10.161&id=0f544353fec8e717d37724d95b92538e1de79e86 · Patch
• https://osv.dev/vulnerability/OESA-2023-1039 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se81-bulletin-20241206SE81 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-00159 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-47946 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2022-47946 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-47946 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-47946 · Vendor Advisory