PT-2024-8464 · Linux+2 · Linux Kernel+2

Published 2022-07-26 · Updated 2024-11-05 · CVE-2022-48635

Positive Technologies (AI Summary)

CVSS v3.1

6.2

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.19.0-rc7

Description The issue is related to an infinite loop in the dax iomap rw() function when the read() system call is invoked with a count of 0. This can cause a WARNING report and an infinite loop. The iomap iter() function returns 1, leading to the infinite loop. The vulnerability can be exploited to cause a denial of service.

Technical details about exploitation include:

• The read() system call with a count of 0 triggers the issue.
• The iomap iter() function returns 1, causing the infinite loop in dax iomap rw().
• The dax iomap rw() function is vulnerable due to its handling of the count variable.

Recommendations To resolve the issue, update the Linux kernel to a version that includes the fix for the infinite loop in dax iomap rw(). As a temporary workaround, consider avoiding the use of the read() system call with a count of 0 until a patch is available.

Exploit

Fix

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

AZL-53846

AZL-53935

BDU:2024-10024

CVE-2022-48635

Affected Products

Astra Linux

Linux Kernel

Red Os

References · 24

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48635.json · Exploit
• https://osv.dev/vulnerability/CVE-2022-48635 · Vendor Advisory
• https://git.kernel.org/stable/c/929ef155e1da41c06f4d8ca86ae12b851a83a744 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2022-48635 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2022-48635 · Vendor Advisory
• https://git.kernel.org/stable/c/17d9c15c9b9e7fb285f7ac5367dfb5f00ff575e3 · Patch
• https://osv.dev/vulnerability/AZL-53846 · Vendor Advisory
• https://git.kernel.org/stable/c/60644dffac87b1bb47bdb393aa29d5f2ffcf41a0 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-48635 · Vendor Advisory
• https://osv.dev/vulnerability/AZL-53935 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-48635 · Vendor Advisory
• https://bdu.fstec.ru/vul/2024-10024 · Security Note
• https://ubuntu.com/security/CVE-2022-48635 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-48635 · Security Note
• https://git.kernel.org/stable/c/463f36137c40342fb03bba380c1bf703c40d89a6 · Note