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.
We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.
References
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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History
13 Feb 2025, 17:16
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Summary | (en) 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. We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc. |
Information
Published : 2023-07-21 21:15
Updated : 2025-02-13 17:16
NVD link : CVE-2023-3609
Mitre link : CVE-2023-3609
CVE.ORG link : CVE-2023-3609
JSON object : View
Products Affected
linux
- linux_kernel
debian
- debian_linux
CWE
CWE-416
Use After Free