An issue was discovered in the Linux kernel before 5.0.10. SMB2_read in fs/cifs/smb2pdu.c has a use-after-free. NOTE: this was not fixed correctly in 5.0.10; see the 5.0.11 ChangeLog, which documents a memory leak.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.10 | mailing list vendor advisory |
| https://github.com/torvalds/linux/commit/088aaf17aa79300cab14dbee2569c58cfafd7d6e | exploit third party advisory patch |
| http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html | third party advisory vendor advisory |
| http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html | third party advisory vendor advisory |
| https://security.netapp.com/advisory/ntap-20191004-0001/ | third party advisory |