CVE-2024-50058 In the Linux kernel, the following vulnerability has been resolved: serial: protect uart_port_dtr_rts() in…
Description
In the Linux kernel, the following vulnerability has been resolved: serial: protect uart_port_dtr_rts() in uart_shutdown() too Commit af224ca2df29 (serial: core: Prevent unsafe uart port access, part 3) added few uport == NULL checks. It added one to uart_shutdown(), so the commit assumes, uport can be NULL in there. But right after that protection, there is an unprotected "uart_port_dtr_rts(uport, false);" call. That is invoked only if HUPCL is set, so I assume that is the reason why we do not see lots of these reports. Or it cannot be NULL at this point at all for some reason :P. Until the above is investigated, stay on the safe side and move this dereference to the if too. I got this inconsistency from Coverity under CID 1585130. Thanks.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux 6.12 | earliest → < 6.12 | 6.12 |
| Linux 6.11 | earliest → < 6.11.4 | 6.11.4 |
| Linux 6.6 | earliest → < 6.6.57 | 6.6.57 |
| Linux 6.1 | earliest → < 6.1.115 | 6.1.115 |
| Linux 5.15 | earliest → < 5.15.170 | 5.15.170 |
| Linux 5.10 | earliest → < 5.10.229 | 5.10.229 |
| Linux | 4.7 | No fix stated |
| SIMATIC S7-1500 TM MFP - GNU/Linux subsystem 1.1 | earliest → < 1.1.1 | 1.1.1 |