CVE-2024-26974: crypto: qat - resolve race condition during AER recovery
In the Linux kernel, the following vulnerability has been resolved:
crypto: qat - resolve race condition during AER recovery
During the PCI AER system's error recovery process, the kernel driver may encounter a race condition with freeing the resetdata structure's memory. If the device restart will take more than 10 seconds the function scheduling that restart will exit due to a timeout, and the resetdata structure will be freed. However, this data structure is used for completion notification after the restart is completed, which leads to a UAF bug.
This results in a KFENCE bug notice.
BUG: KFENCE: use-after-free read in adfdeviceresetworker+0x38/0xa0 [intelqat] Use-after-free read at 0x00000000bc56fddf (in kfence-#142): adfdeviceresetworker+0x38/0xa0 [intelqat] processonework+0x173/0x340
To resolve this race condition, the memory associated to the container of the workstruct is freed on the worker if the timeout expired, otherwise on the function that schedules the worker. The timeout detection can be done by checking if the caller is still waiting for completion or not by using completiondone() function.
Other sources
In the Linux kernel, the following vulnerability has been resolved:
crypto: qat - resolve race condition during AER recovery
The Linux kernel CVE team has assigned CVE-2024-26974 to this issue.
Upstream advisory: https://lore.kernel.org/linux-cve-announce/2024050132-CVE-2024-26974-13eb@gregkh/T
— Red Hat
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2024-26974?
CVE-2024-26974 has been identified as having a medium severity due to its potential impact on system stability during error recovery processes.
How do I fix CVE-2024-26974?
To fix CVE-2024-26974, update your Linux kernel to version 4.19.312, 5.4.274, 5.10.215, 5.15.154, 6.1.84, 6.6.24, 6.7.12, 6.8.3, or 6.9.
Which systems are affected by CVE-2024-26974?
CVE-2024-26974 affects various versions of the Linux kernel across distributions like Red Hat and Debian.
What causes CVE-2024-26974?
CVE-2024-26974 is caused by a race condition during the PCI AER system's error recovery process in the Linux kernel.
Is there a workaround for CVE-2024-26974?
There is no official workaround for CVE-2024-26974; the only resolution is to apply the recommended kernel upgrades.