PT-2023-9335 · Linux+2 · Linux Kernel+2

David Wang · Published 2023-01-09 · Updated 2024-08-29 · CVE-2022-48892

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description The issue is related to a use-after-free bug in the dup user cpus ptr() function. This bug can be exploited when the sched setaffinity() function is invoked from another process while the process being modified is undergoing a fork operation. The bug can lead to a use-after-free and possibly a double-free in the arm64 kernel. The problem arises because dup user cpus ptr() accesses user cpus ptr without any lock protection, even though the setting and clearing of user cpus ptr are done under pi lock for the arm64 architecture.

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

Exploit

Use After Free

Double Free

Weakness Enumeration

CWE-416

CWE-415

Related Identifiers

BDU:2024-06624

CVE-2022-48892

Affected Products

Astra Linux

Linux Kernel

Red Os

References · 20

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48892.json · Exploit
• https://git.kernel.org/stable/c/7b5cc7fd1789ea5dbb942c9f8207b076d365badc · Patch
• https://git.kernel.org/stable/c/87ca4f9efbd7cc649ff43b87970888f2812945b8 · Patch
• https://security-tracker.debian.org/tracker/CVE-2022-48892 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-48892 · Vendor Advisory
• https://wiki.astralinux.ru/pages/viewpage.action?pageId=158612043 · Vendor Advisory
• https://git.kernel.org/stable/c/b22faa21b6230d5eccd233e1b7e0026a5002b287 · Patch
• https://osv.dev/vulnerability/CVE-2022-48892 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-48892 · Vendor Advisory
• https://bdu.fstec.ru/vul/2024-06624 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-48892 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-48892 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-48892 · Security Note
• https://t.me/cvenotify/92630 · Telegram Post
• https://twitter.com/CVEnew/status/1826142272859107502 · Twitter Post