CVE-2024-50058

medium

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.

References

https://git.kernel.org/stable/c/e418d91195d29d5f9c9685ff309b92b04b41dc40

https://git.kernel.org/stable/c/d7b5876a6e74cdf8468a478be6b23f2f5464ac7a

https://git.kernel.org/stable/c/76ed24a34223bb2c6b6162e1d8389ec4e602a290

https://git.kernel.org/stable/c/602babaa84d627923713acaf5f7e9a4369e77473

https://git.kernel.org/stable/c/399927f0f875b93f3d5a0336d382ba48b8671eb2

https://git.kernel.org/stable/c/2fe399bb8efd0d325ab1138cf8e3ecf23a39e96d

Details

Source: Mitre, NVD

Published: 2024-10-21

Updated: 2024-11-08

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium