CVE-2024-38629
In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Avoid unnecessary destruction of file_ida file_ida is allocated during cdev open and is freed accordingly during cdev release.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.23%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Avoid unnecessary destruction of file_ida file_ida is allocated during cdev open and is freed accordingly during cdev release. This sequence is guaranteed by driver file operations. Therefore, there is no need to destroy an already empty file_ida when the WQ cdev is removed. Worse, ida_free() in cdev release may happen after destruction of file_ida per WQ cdev. This can lead to accessing an id in file_ida after it has been destroyed, resulting in a kernel panic. Remove ida_destroy(&file_ida) to address these issues.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.23% probability · 14th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/15edb906211bf53e7b5574f7326ab734d6bff4f9Patch
- https://git.kernel.org/stable/c/76e43fa6a456787bad31b8d0daeabda27351a480Patch
- https://git.kernel.org/stable/c/9eb15f24a0b9b017b39cde8b8c07243676b63687Patch
- https://git.kernel.org/stable/c/15edb906211bf53e7b5574f7326ab734d6bff4f9Patch
- https://git.kernel.org/stable/c/76e43fa6a456787bad31b8d0daeabda27351a480Patch
- https://git.kernel.org/stable/c/9eb15f24a0b9b017b39cde8b8c07243676b63687Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.