drivers/block/floppy.c in the Linux kernel before 5.17.6 is vulnerable to a denial of service, because of a concurrency use-after-free flaw after deallocating raw_cmd in the raw_cmd_ioctl function.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
| Link | Tags |
|---|---|
| https://github.com/torvalds/linux/commit/233087ca063686964a53c829d547c7571e3f67bf | third party advisory patch |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/225362 | third party advisory vdb entry |
| https://seclists.org/oss-sec/2022/q2/66 | mailing list exploit third party advisory patch |
| https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.6 | release notes vendor advisory |
| https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html | mailing list third party advisory |
| https://www.debian.org/security/2022/dsa-5173 | third party advisory vendor advisory |