vulnerability
Debian: CVE-2022-49147: linux -- security update
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 9 | (AV:N/AC:L/Au:S/C:C/I:N/A:C) | Feb 27, 2025 | Feb 27, 2025 | Feb 28, 2025 |
Severity
9
CVSS
(AV:N/AC:L/Au:S/C:C/I:N/A:C)
Published
Feb 27, 2025
Added
Feb 27, 2025
Modified
Feb 28, 2025
Description
In the Linux kernel, the following vulnerability has been resolved:
block: Fix the maximum minor value is blk_alloc_ext_minor()
ida_alloc_range(..., min, max, ...) returns values from min to max,
inclusive.
So, NR_EXT_DEVT is a valid idx returned by blk_alloc_ext_minor().
This is an issue because in device_add_disk(), this value is used in:
ddev->devt = MKDEV(disk->major, disk->first_minor);
and NR_EXT_DEVT is '(1
So, should 'disk->first_minor' be NR_EXT_DEVT, it would overflow.
Solution
debian-upgrade-linux
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