A use-after-free vulnerabilitity was discovered in drivers/net/hamradio/6pack.c of linux that allows an attacker to crash linux kernel by simulating ax25 device using 6pack driver from user space.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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://bugzilla.redhat.com/show_bug.cgi?id=2070689 | issue tracking third party advisory |
| https://www.openwall.com/lists/oss-security/2022/04/02/3 | mailing list exploit third party advisory |
| https://github.com/torvalds/linux/commit/efe4186e6a1b54bf38b9e05450d43b0da1fd7739 | exploit third party advisory patch |
| https://access.redhat.com/security/cve/CVE-2022-1198 | third party advisory |