CVE-2024-50157: RDMA/bnxt_re: Avoid CPU lockups due fifo occupancy check loop
First published: Thu Nov 07 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: RDMA/bnxt_re: Avoid CPU lockups due fifo occupancy check loop Driver waits indefinitely for the fifo occupancy to go below a threshold as soon as the pacing interrupt is received. This can cause soft lockup on one of the processors, if the rate of DB is very high. Add a loop count for FPGA and exit the __wait_for_fifo_occupancy_below_th if the loop is taking more time. Pacing will be continuing until the occupancy is below the threshold. This is ensured by the checks in bnxt_re_pacing_timer_exp and further scheduling the work for pacing based on the fifo occupancy.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=6.6<6.11.6 | |
| Linux Kernel | =6.12-rc1 | |
| Linux Kernel | =6.12-rc2 | |
| Linux Kernel | =6.12-rc3 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.135-1 6.12.22-1 6.12.25-1 |
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Reference Links
- https://git.kernel.org/stable/c/7998e7efd1d557af118ac96f48ebc569b929b555
- https://git.kernel.org/stable/c/2fb6b2e82413e401b72dfeacd7a60416fcfc5b41
- https://git.kernel.org/stable/c/8be3e5b0c96beeefe9d5486b96575d104d3e7d17
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-50157
- https://nvd.nist.gov/vuln/detail/CVE-2024-50157
- https://launchpad.net/bugs/cve/CVE-2024-50157
- https://security-tracker.debian.org/tracker/CVE-2024-50157
- https://ubuntu.com/security/CVE-2024-50157
- https://git.kernel.org/linus/8be3e5b0c96beeefe9d5486b96575d104d3e7d17
Frequently Asked Questions
What is the severity of CVE-2024-50157?
CVE-2024-50157 is considered a medium severity vulnerability due to the risk of causing soft lockups in systems using affected kernel versions.
How do I fix CVE-2024-50157?
To mitigate CVE-2024-50157, users should update their Linux kernel to version 6.12-rc4 or later, where the vulnerability has been patched.
Which versions of the Linux kernel are affected by CVE-2024-50157?
CVE-2024-50157 affects Linux kernel versions from 6.6 to 6.11.6 and includes specific 6.12 release candidates up to rc3.
What are the potential impacts of CVE-2024-50157?
The potential impact of CVE-2024-50157 includes system instability and performance issues, specifically soft lockups during FIFO occupancy checks.
Is CVE-2024-50157 specific to any Linux distributions?
CVE-2024-50157 is related to the Linux kernel itself and could potentially affect any Linux distribution utilizing the vulnerable kernel versions.
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