CVE-2024-40966

tty: add the option to have a tty reject a new ldisc

Description

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.

N/A

CVSS

Severity:

EPSS 0.15%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/3c6332f3bb1578b5b10ac2561247b1d6272ae937
https://git.kernel.org/stable/c/287b569a5b914903ba7c438a3c0dbc3410ebb409
https://git.kernel.org/stable/c/5920ac19964f9e20181f63b410d9200ddbf8dc86
https://git.kernel.org/stable/c/6bd23e0c2bb6c65d4f5754d1456bc9a4427fc59b

Frequently Asked Questions

What is the severity of CVE-2024-40966?: CVE-2024-40966 has not yet been assigned a CVSS score.
How to fix CVE-2024-40966?: To fix CVE-2024-40966, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-40966 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2024-40966 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-40966?: CVE-2024-40966 affects Linux Linux, Linux Linux.

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