A use-after-free flaw was found in the Linux kernel’s SGI GRU driver in the way the first gru_file_unlocked_ioctl function is called by the user, where a fail pass occurs in the gru_check_chiplet_assignment function. This flaw allows a local user to crash or potentially escalate their privileges on the system.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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=2132640 | issue tracking third party advisory patch |
| https://github.com/torvalds/linux/commit/643a16a0eb1d6ac23744bb6e90a00fc21148a9dc | patch |
| https://lore.kernel.org/all/20221019031445.901570-1-zyytlz.wz%40163.com/ | |
| https://www.spinics.net/lists/kernel/msg4518970.html | mailing list patch |
| https://security.netapp.com/advisory/ntap-20230406-0005/ | third party advisory |
| https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html | third party advisory mailing list |
| https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html | third party advisory mailing list |