CVE-2024-50058 Information

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 rt_port_dtr_rts(uport false);\ncall. 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.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

https://git.kernel.org/stable/c/e418d91195d29d5f9c9685ff309b92b04b41dc40 https://git.kernel.org/stable/c/76ed24a34223bb2c6b6162e1d8389ec4e602a290 https://git.kernel.org/stable/c/602babaa84d627923713acaf5f7e9a4369e77473

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5