Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2024-40966

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
12/07/2024
Last modified:
03/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> tty: add the option to have a tty reject a new ldisc<br /> <br /> ... and use it to limit the virtual terminals to just N_TTY. They are<br /> kind of special, and in particular, the "con_write()" routine violates<br /> the "writes cannot sleep" rule that some ldiscs rely on.<br /> <br /> This avoids the<br /> <br /> BUG: sleeping function called from invalid context at kernel/printk/printk.c:2659<br /> <br /> when N_GSM has been attached to a virtual console, and gsmld_write()<br /> calls con_write() while holding a spinlock, and con_write() then tries<br /> to get the console lock.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.1.96 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.2 (including) 6.6.36 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.7 (including) 6.9.7 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools