CVE-2024-50058

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  3. CVE-2024-50058

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

I

n 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
Link Resource
https://git.kernel.org/stable/c/2fe399bb8efd0d325ab1138cf8e3ecf23a39e96d
https://git.kernel.org/stable/c/399927f0f875b93f3d5a0336d382ba48b8671eb2
https://git.kernel.org/stable/c/602babaa84d627923713acaf5f7e9a4369e77473 Patch
https://git.kernel.org/stable/c/76ed24a34223bb2c6b6162e1d8389ec4e602a290 Patch
https://git.kernel.org/stable/c/d7b5876a6e74cdf8468a478be6b23f2f5464ac7a
https://git.kernel.org/stable/c/e418d91195d29d5f9c9685ff309b92b04b41dc40 Patch
https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

03 Nov 2025, 23:16

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html -

03 Nov 2025, 21:16

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html -

08 Nov 2024, 16:15

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/2fe399bb8efd0d325ab1138cf8e3ecf23a39e96d -

04 Nov 2024, 12:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/399927f0f875b93f3d5a0336d382ba48b8671eb2 -
  • () https://git.kernel.org/stable/c/d7b5876a6e74cdf8468a478be6b23f2f5464ac7a -

24 Oct 2024, 03:56

Type Values Removed Values Added
CWE CWE-476
References () https://git.kernel.org/stable/c/602babaa84d627923713acaf5f7e9a4369e77473 - () https://git.kernel.org/stable/c/602babaa84d627923713acaf5f7e9a4369e77473 - Patch
References () https://git.kernel.org/stable/c/76ed24a34223bb2c6b6162e1d8389ec4e602a290 - () https://git.kernel.org/stable/c/76ed24a34223bb2c6b6162e1d8389ec4e602a290 - Patch
References () https://git.kernel.org/stable/c/e418d91195d29d5f9c9685ff309b92b04b41dc40 - () https://git.kernel.org/stable/c/e418d91195d29d5f9c9685ff309b92b04b41dc40 - Patch
First Time Linux
Linux linux Kernel
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

23 Oct 2024, 15:12

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: serial: proteger uart_port_dtr_rts() en uart_shutdown() también El commit af224ca2df29 (serial: core: Prevenir el acceso inseguro al puerto uart, parte 3) agregó algunas comprobaciones uport == NULL. Agregó una a uart_shutdown(), por lo que el commit asume que uport puede ser NULL allí. Pero justo después de esa protección, hay una llamada "uart_port_dtr_rts(uport, false);" sin protección. Eso se invoca solo si HUPCL está configurado, por lo que supongo que esa es la razón por la que no vemos muchos de estos informes. O no puede ser NULL en este punto en absoluto por alguna razón :P. Hasta que se investigue lo anterior, manténgase del lado seguro y mueva esta desreferencia al if también. Obtuve esta inconsistencia de Coverity bajo CID 1585130. Gracias.

21 Oct 2024, 20:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-10-21 20:15

Updated : 2025-11-03 23:16

NVD link : CVE-2024-50058

Mitre link : CVE-2024-50058

CVE.ORG link : CVE-2024-50058

JSON object : View

Products Affected

linux

CWE
CWE-476

NULL Pointer Dereference