A use-after-free flaw was found in the Linux kernel’s Bluetooth subsystem in the way user calls connect to the socket and disconnect simultaneously due to a race condition. This flaw allows a user to crash the system or escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
| Link | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1999544 | issue tracking third party advisory |
| https://lore.kernel.org/lkml/20211115165435.133245729%40linuxfoundation.org/ | |
| https://www.openwall.com/lists/oss-security/2021/09/15/4 | mailing list exploit third party advisory |
| https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html | third party advisory mailing list |
| https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html | third party advisory mailing list |
| https://www.debian.org/security/2022/dsa-5096 | third party advisory vendor advisory |
| https://www.oracle.com/security-alerts/cpujul2022.html | third party advisory patch |
| https://security.netapp.com/advisory/ntap-20220318-0009/ | third party advisory |