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CVE-2025-39997

ALSA: usb-audio: fix race condition to UAF in snd_usbmidi_free

In the Linux kernel, the following vulnerability has been resolved:

ALSA: usb-audio: fix race condition to UAF in snd_usbmidi_free

The previous commit 0718a78f6a9f ("ALSA: usb-audio: Kill timer properly at
removal") patched a UAF issue caused by the error timer.

However, because the error timer kill added in this patch occurs after the
endpoint delete, a race condition to UAF still occurs, albeit rarely.

Additionally, since kill-cleanup for urb is also missing, freed memory can
be accessed in interrupt context related to urb, which can cause UAF.

Therefore, to prevent this, error timer and urb must be killed before
freeing the heap memory.
Daten sind bereitgestellt durch das CVE Programm von Authorized Data Publishers (ADP) (Unstrukturiert)
HerstellerSiemens
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Produkt SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Default Statusunknown
Version 0
Version < *
Status affected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.19% 0.089
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/dc4874366cf6cf4a31d8fa4b7f0e2a5b2d7647ba
https://git.kernel.org/stable/c/647d6b8d22be12842fde6ed0c56859ebc615f21e
https://git.kernel.org/stable/c/af600e7f5526d16146b3ae99f6ad57bfea79ca33
https://git.kernel.org/stable/c/353d8c715cc951a980728133c9dd64ca5a0a186c
https://git.kernel.org/stable/c/9f2c0ac1423d5f267e7f1d1940780fc764b0fee3
https://git.kernel.org/stable/c/e16985513e89466a236d2a7c202783b4dd0c5a46
https://git.kernel.org/stable/c/e63f049c7764b615d1d50cb486745fa63372b42d
https://cert-portal.siemens.com/productcert/html/ssa-784472.html