CVE-2022-49147
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49147
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49147.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-49147
- Downstream
- Related
- Published
- 2025-02-26T07:00:51Z
- Modified
- 2025-08-09T20:01:26Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
block: Fix the maximum minor value is blkallocext_minor()
idaallocrange(..., min, max, ...) returns values from min to max, inclusive.
So, NREXTDEVT is a valid idx returned by blkallocext_minor().
This is an issue because in deviceadddisk(), this value is used in: ddev->devt = MKDEV(disk->major, disk->firstminor); and NREXT_DEVT is '(1 << MINORBITS)'.
So, should 'disk->firstminor' be NREXT_DEVT, it would overflow.
- References