PT-2021-8142 · Linux+2 · Linux Kernel+2

Yevhen Orlov · Published 2021-12-17 · Updated 2024-10-11 · CVE-2021-47102

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

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

Description The issue is related to an incorrect structure access in the Linux kernel's net component, specifically in the prestera module. This can cause invalid memory access for certain events, leading to a potential denial of service. The problem arises when accessing the upper dev field, which is only valid for specific events like NETDEV CHANGEUPPER. The KASAN logs indicate a stack-out-of-bounds error in the prestera netdev port event function.

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

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2024-08411

CVE-2021-47102

OPENSUSE-SU-2024_1321-1

OPENSUSE-SU-2024_1322-1

OPENSUSE-SU-2024_1322-2

OPENSUSE-SU-2024_1332-1

OPENSUSE-SU-2024_1332-2

OPENSUSE-SU-2024_1466-1

OPENSUSE-SU-2024_1480-1

OPENSUSE-SU-2024_1490-1

SUSE-SU-2024:1320-1

SUSE-SU-2024:1321-1

SUSE-SU-2024:1466-1

SUSE-SU-2024:1480-1

SUSE-SU-2024:1490-1

Affected Products

Linux Kernel

Red Os

Suse

References · 462

• https://osv.dev/vulnerability/SUSE-SU-2024:1320-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-47102 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:1466-1 · Vendor Advisory
• https://git.kernel.org/stable/c/2efc2256febf214e7b2bdaa21fe6c3c3146acdcb · Patch
• https://security-tracker.debian.org/tracker/CVE-2021-47102 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:1480-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-47102 · Security Note
• https://osv.dev/vulnerability/CVE-2021-47102 · Vendor Advisory
• https://bdu.fstec.ru/vul/2024-08411 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-47102 · Security Note
• https://git.kernel.org/stable/c/5c553a0cd1263e4da5f220d80fa713fc3959c1d0 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2024:1490-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:1321-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47102 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47102 · Vendor Advisory