PT-2023-3675 · Linux+9 · Linux Kernel+9
Published
2023-06-09
·
Updated
2024-11-21
·
CVE-2023-3609
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 (affected versions not specified)
Description
A use-after-free vulnerability in the Linux kernel's net/sched: cls u32 component can be exploited to achieve local privilege escalation. If
tcf change indev() fails, u32 set parms() will immediately return an error after incrementing or decrementing the reference counter in tcf bind filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.Recommendations
Upgrade past commit 04c55383fa5689357bcdd2c8036725a55ed632bc to resolve the issue. As a temporary workaround, consider restricting access to the vulnerable
cls u32 component to minimize the risk of exploitation.Fix
DoS
LPE
Double Free
Use After Free
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Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Linuxmint
Linux Kernel
Red Hat
Red Os
Suse
Ubuntu