PT-2023-2756 · Linux+9 · Linux Kernel+9
Gwangun Jung
·
Published
2023-04-13
·
Updated
2024-10-21
·
CVE-2023-31436
CVSS v3.1
7.8
High
| 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 versions prior to 6.2.13
Description
The issue is related to the
qfq change class function in the Linux kernel, which allows an out-of-bounds write because lmax can exceed QFQ MIN LMAX. This can potentially impact the confidentiality, integrity, and availability of protected information. The vulnerability may be exploited to gain local privilege escalation.Recommendations
For Linux kernel versions prior to 6.2.13, update to version 6.2.13 or later to resolve the issue.
As a temporary workaround, consider restricting access to the
qfq change class function in the net/sched/sch qfq.c file until a patch is available.Fix
DoS
Out of bounds Read
Memory Corruption
Buffer Overflow
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Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Linuxmint
Linux Kernel
Red Hat
Red Os
Suse
Ubuntu