CVE-2024-39292

low-risk
Published 2024-06-24

In the Linux kernel, the following vulnerability has been resolved: um: Add winch to winch_handlers before registering winch IRQ Registering a winch IRQ is racy, an interrupt may occur before the winch is added to the winch_handlers list. If that happens, register_winch_irq() adds to that list a winch that is scheduled to be (or has already been) freed, causing a panic later in winch_cleanup(). Avoid the race by adding the winch to the winch_handlers list before registering the IRQ, and rolling back if um_request_irq() fails.

Do I need to act?

-
0.03% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (2)

Affected Vendors

Linux

References (17)

Mailing List https://git.kernel.org/stable/c/0c02d425a2fbe52643a5859a779db0329e7dddd4
Mailing List https://git.kernel.org/stable/c/31960d991e43c8d6dc07245f19fc13398e90ead2
Mailing List https://git.kernel.org/stable/c/351d1a64544944b44732f6a64ed65573b00b9e14
Mailing List https://git.kernel.org/stable/c/434a06c38ee1217a8baa0dd7c37cc85d50138fb0
Mailing List https://git.kernel.org/stable/c/66ea9a7c6824821476914bed21a476cd20094f33
Mailing List https://git.kernel.org/stable/c/73b8e21f76c7dda4905655d2e2c17dc5a73b87f1
Mailing List https://git.kernel.org/stable/c/a0fbbd36c156b9f7b2276871d499c9943dfe5101
Mailing List https://git.kernel.org/stable/c/dc1ff95602ee908fcd7d8acee7a0dadb61b1a0c0
Mailing List https://git.kernel.org/stable/c/0c02d425a2fbe52643a5859a779db0329e7dddd4
Mailing List https://git.kernel.org/stable/c/31960d991e43c8d6dc07245f19fc13398e90ead2
Mailing List https://git.kernel.org/stable/c/351d1a64544944b44732f6a64ed65573b00b9e14
Mailing List https://git.kernel.org/stable/c/434a06c38ee1217a8baa0dd7c37cc85d50138fb0
Mailing List https://git.kernel.org/stable/c/66ea9a7c6824821476914bed21a476cd20094f33
Mailing List https://git.kernel.org/stable/c/73b8e21f76c7dda4905655d2e2c17dc5a73b87f1
Mailing List https://git.kernel.org/stable/c/a0fbbd36c156b9f7b2276871d499c9943dfe5101
Mailing List https://git.kernel.org/stable/c/dc1ff95602ee908fcd7d8acee7a0dadb61b1a0c0
https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
25
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 7/34 · Low