An issue was discovered in the Linux kernel before 4.16.7. A use-after-free can be caused by the function rsi_mac80211_detach in the file drivers/net/wireless/rsi/rsi_91x_mac80211.c.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=abd39c6ded9db53aa44c2540092bdd5fb6590fa8 | patch vendor advisory mailing list |
| https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.16.7 | vendor advisory mailing list |
| http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html | vendor advisory |
| http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html | vendor advisory |
| https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html | mailing list |
| https://security.netapp.com/advisory/ntap-20191004-0001/ | |
| https://usn.ubuntu.com/4162-1/ | vendor advisory |
| https://usn.ubuntu.com/4163-1/ | vendor advisory |
| https://usn.ubuntu.com/4163-2/ | vendor advisory |
| https://usn.ubuntu.com/4162-2/ | vendor advisory |
| http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html | |
| https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html | mailing list |