Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb: 6fire: Avoid embedded URBs The USB 6fire driver uses URBs embedded in different structs for PCM, MIDI and communication, and this is basically a buggy implementation nowadays; since a URB is managed with a refcount, this may lead to a UAF when the URB is released asynchronously. For addressing the problem, this patch converts those embedded URBs to ones that are properly allocated via usb_alloc_urb(). The pcm_urb.packets[] is gone, as it's allocated by usb_alloc_urb(), hence it's found in urb.iso_frame_desc[] instead. The conversions are rather straightforward; each embedded struct urb is changed to a pointer, and its callers are updated accordingly. The resource for those structs are released in the common destructor functions (usb6fire_comm_free(), etc), which are called at both the init error path and the disconnect. No functional changes, only compile-tested.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 to < 3ef9093d83ffecb8e5f6c9d5769a52d39df74f7aaffectedc6d43ba816d1cf1d125bfbfc938f2a28a87facf9 to < 8b8559aeaba2e51cfee1779b2383b085991f7d81affectedc6d43ba816d1cf1d125bfbfc938f2a28a87facf9 to < 52a43c2d57e774489ac3fbbac06ff02f19bd9a52affectedc6d43ba816d1cf1d125bfbfc938f2a28a87facf9 to < 999f433c09e4668412bd68ca207ae2b4af863862affectedc6d43ba816d1cf1d125bfbfc938f2a28a87facf9 to < d181434549b3da668110a25d743848cce9897f4eaffectedc6d43ba816d1cf1d125bfbfc938f2a28a87facf9 to < 9fe49dbc023e82dfaee7b245997d820d01742a9aaffected
Linux Linux
Default version status: affected
2.6.39affected0 to < 2.6.39unaffected6.1.189 to ≤ 6.1.*unaffected6.6.158 to ≤ 6.6.*unaffected6.12.112 to ≤ 6.12.*unaffected6.18.54 to ≤ 6.18.*unaffected7.2.8 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/3ef9093d83ffecb8e5f6c9d5769a52d39df74f7a ↗
- https://git.kernel.org/stable/c/8b8559aeaba2e51cfee1779b2383b085991f7d81 ↗
- https://git.kernel.org/stable/c/52a43c2d57e774489ac3fbbac06ff02f19bd9a52 ↗
- https://git.kernel.org/stable/c/999f433c09e4668412bd68ca207ae2b4af863862 ↗
- https://git.kernel.org/stable/c/d181434549b3da668110a25d743848cce9897f4e ↗
- https://git.kernel.org/stable/c/9fe49dbc023e82dfaee7b245997d820d01742a9a ↗