CVE-2023-4133: Kernel: cxgb4: use-after-free in ch_flower_stats_cb()
First published: Mon Jul 10 2023(Updated: )
A use-after-free vulnerability was found in the cxgb4 driver in the Linux kernel. The bug occurs when the cxgb4 device is detaching due to a possible rearming of the flower_stats_timer from the work queue. This flaw allows a local user to crash the system, causing a denial of service condition.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.3 | 6.3 |
| Linux Linux kernel | <6.3 | |
| Red Hat Enterprise Linux | =8.0 | |
| Red Hat Enterprise Linux | =9.0 | |
| Fedoraproject Fedora |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=2221702
- https://access.redhat.com/security/cve/CVE-2023-4133
- https://github.com/torvalds/linux/commit/e50b9b9e8610d47b7c22529443e45a16b1ea3a15
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2228787
- https://access.redhat.com/errata/RHSA-2024:2394
- https://access.redhat.com/errata/RHSA-2024:2950
- https://access.redhat.com/errata/RHSA-2024:3138
Frequently Asked Questions
What is CVE-2023-4133?
CVE-2023-4133 is a use-after-free vulnerability in the cxgb4 driver in the Linux kernel, which can cause a denial of service condition.
How severe is CVE-2023-4133?
CVE-2023-4133 has a severity rating of medium (5.5).
What software is affected by CVE-2023-4133?
The affected software includes Red Hat Kernel 6.3, Linux Kernel up to version 6.3, Red Hat Enterprise Linux 8.0, Red Hat Enterprise Linux 9.0, and Fedora.
How can CVE-2023-4133 be exploited?
CVE-2023-4133 can be exploited by a local user to crash the system, leading to a denial of service.
Are there any remedies available for CVE-2023-4133?
Yes, Red Hat provides a fix for CVE-2023-4133 in their kernel version 6.3 and above.
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