What is CVE-2024-40966?

CVE-2024-40966 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2024-40966 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-40966?

CVE-2024-40966 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2024-40966?

No patch is currently available for CVE-2024-40966. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2024-40966 actively exploited?

CVE-2024-40966 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2024-40966

Medium

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

Package Linux Kernel

Published 2024-07-12

Last modified 2025-11-03

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

References

The following references provide additional information about CVE-2024-40966 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Kernel patch commit
https://git.kernel.org/stable/c/287b569a5b914903ba7c438a3c0dbc3410ebb409
Patch
Kernel patch commit
https://git.kernel.org/stable/c/3c6332f3bb1578b5b10ac2561247b1d6272ae937
Patch
Kernel patch commit
https://git.kernel.org/stable/c/5920ac19964f9e20181f63b410d9200ddbf8dc86
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2024-40966

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-07-12

Modified 2025-11-03

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2024-40966?

CVE-2024-40966 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2024-40966 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-40966?

CVE-2024-40966 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2024-40966?

No patch is currently available for CVE-2024-40966. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2024-40966 actively exploited?

No — CVE-2024-40966 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.