CVE-2023-2248

CVSS V2 None CVSS V3 None

Description

A heap out-of-bounds read/write vulnerability in the Linux Kernel traffic control (QoS) subsystem can be exploited to achieve local privilege escalation. The qfq_change_class function does not properly limit the lmax variable which can lead to out-of-bounds read/write. If the TCA_QFQ_LMAX value is not offered through nlattr, lmax is determined by the MTU value of the network device. The MTU of the loopback device can be set up to 2^31-1 and as a result, it is possible to have an lmax value that exceeds QFQ_MIN_LMAX. We recommend upgrading past commit 3037933448f60f9acb705997eae62013ecb81e0d.

Overview

CVE ID
CVE-2023-2248

Assigner
cve-coordination@google.com

Vulnerability Status
Awaiting Analysis

Published Version
2023-05-01T13:15:44

Last Modified Date
2023-05-01T13:38:48

Weakness Enumerations

CWE	URL
CWE-787	http://cwe.mitre.org/data/definitions/787.html

References

Reference URL	Reference Tags
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3037933448f60f9acb705997eae62013ecb81e0d
https://kernel.dance/3037933448f60f9acb705997eae62013ecb81e0d

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2023-2248
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2248

History

Created	Old Value	New Value	Data Type	Notes
2023-05-01 14:01:05				Added to TrackCVE
2023-05-01 14:01:07			Weakness Enumeration	new