PT-2021-6480 · Linux+2 · Linux Kernel+2

Hao Sun · Published 2021-09-07 · Updated 2023-08-14 · CVE-2021-4150

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 A use-after-free flaw was found in the add partition function in the Linux kernel, specifically in the block/partitions/core.c file. This issue can be exploited by a local attacker with user privileges to cause a denial of service on the system. The problem arises from the lack of proper code cleanup when the device add call fails during the addition of a partition to the disk.

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

Exploit

DoS

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALT-PU-2021-3330

ALT-PU-2021-3358

ALT-PU-2021-3563

ALT-PU-2021-3573

ALT-PU-2021-3660

ALT-PU-2022-1240

ALT-PU-2022-1419

ALT-PU-2022-1421

ALT-PU-2023-1814

ALT-PU-2023-4894

BDU:2022-01725

CVE-2021-4150

Affected Products

Alt Linux

Astra Linux

Linux Kernel

References · 14

• 🔥 https://lkml.org/lkml/2021/10/18/485 · Exploit
• 🔥 https://lkml.org/lkml/2021/9/6/781 · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-4150 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-4150 · Security Note
• https://bdu.fstec.ru/vul/2022-01725 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-4150 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-4150 · Security Note
• https://ubuntu.com/security/CVE-2021-4150 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-4150 · Vendor Advisory
• https://vuldb.com/?id.195651 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2025938 · Note
• https://linuxkernelcves.com/cves/CVE-2021-4150 · Note
• https://git.kernel.org/linus/9fbfabfda25d8774c5a08634fdd2da000a924890 · Note
• https://t.me/cibsecurity/39447 · Telegram Post