7.8 High

CVE-2024-39292 In the Linux kernel, the following vulnerability has been resolved: um: Add winch to winch_handlers before registering…

Description

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.

Affected products and versions

Product	Affected versions	Fixed in
Linux 6.10	earliest → < 6.10	6.10
Linux 6.9	earliest → < 6.9.4	6.9.4
Linux 6.6	earliest → < 6.6.33	6.6.33
Linux 6.1	earliest → < 6.1.93	6.1.93
Linux 5.15	earliest → < 5.15.161	5.15.161
Linux 5.10	earliest → < 5.10.219	5.10.219
Linux 5.4	earliest → < 5.4.278	5.4.278
Linux 4.19	earliest → < 4.19.316	4.19.316
Linux	2.6.23	No fix stated

Show the 6 other branches

Product	Affected versions	Fixed in
RUGGEDCOM RST2428P 3.1	earliest → < 3.1	3.1
SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family	Versions not published
SCALANCE XCM-/XRM-/XCH-/XRH-300 family 3.1	earliest → < 3.1	3.1
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1	3.1.0 → < 3.1.5	3.1.5
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1	3.1.0 → < 3.1.5	3.1.5
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1	3.1.0 → < 3.1.5	3.1.5