Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: media: vidtv: initialize local pointers upon transfer of memory ownership vidtv_channel_si_init() creates a temporary list (program, service, event) and ownership of the memory itself is transferred to the PAT/SDT/EIT tables through vidtv_psi_pat_program_assign(), vidtv_psi_sdt_service_assign(), vidtv_psi_eit_event_assign(). The problem here is that the local pointer where the memory ownership transfer was completed is not initialized to NULL. This causes the vidtv_psi_pmt_create_sec_for_each_pat_entry() function to fail, and in the flow that jumps to free_eit, the memory that was freed by vidtv_psi_*_table_destroy() can be accessed again by vidtv_psi_*_event_destroy() due to the uninitialized local pointer, so it is freed once again. Therefore, to prevent use-after-free and double-free vulnerability, local pointers must be initialized to NULL when transferring memory ownership.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3be8037960bccd13052cfdeba8805ad785041d70 before c342e294dac4988c8ada759b2f057246e48c5108; affected 3be8037960bccd13052cfdeba8805ad785041d70 before 12ab6ebb37789b84073e83e4d9b14a5e0d133323; affected 3be8037960bccd13052cfdeba8805ad785041d70 before 3caa18d35f1dabe85a3dd31bc387f391ac9f9b4e; affected 3be8037960bccd13052cfdeba8805ad785041d70 before fb9bd6d8d314b748e946ed6555eb4a956ee8c4d8; affected 3be8037960bccd13052cfdeba8805ad785041d70 before a69c7fd603bf5ad93177394fbd9711922ee81032; affected 3be8037960bccd13052cfdeba8805ad785041d70 before 30f4d4e5224a9e44e9ceb3956489462319d804ce; affected 3be8037960bccd13052cfdeba8805ad785041d70 before 98aabfe2d79f74613abc2b0b1cef08f97eaf5322 |
| Linux / Linux | affected 5.10; unaffected 0 before 5.10; unaffected 5.10.248 through 5.10.*; unaffected 5.15.198 through 5.15.*; unaffected 6.1.160 through 6.1.*; unaffected 6.6.120 through 6.6.*; unaffected 6.12.64 through 6.12.*; unaffected 6.18.3 through 6.18.*; unaffected 6.19 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c342e294dac4988c8ada759b2f057246e48c5108
- https://git.kernel.org/stable/c/12ab6ebb37789b84073e83e4d9b14a5e0d133323
- https://git.kernel.org/stable/c/3caa18d35f1dabe85a3dd31bc387f391ac9f9b4e
- https://git.kernel.org/stable/c/fb9bd6d8d314b748e946ed6555eb4a956ee8c4d8
- https://git.kernel.org/stable/c/a69c7fd603bf5ad93177394fbd9711922ee81032
- https://git.kernel.org/stable/c/30f4d4e5224a9e44e9ceb3956489462319d804ce
- https://git.kernel.org/stable/c/98aabfe2d79f74613abc2b0b1cef08f97eaf5322