Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_hid: fix f_hidg lifetime vs cdev The embedded struct cdev does not have its lifetime correctly tied to the enclosing struct f_hidg, so there is a use-after-free if /dev/hidgN is held open while the gadget is deleted. This can readily be replicated with libusbgx's example programs (for conciseness - operating directly via configfs is equivalent): gadget-hid exec 3<> /dev/hidg0 gadget-vid-pid-remove exec 3<&- Pull the existing device up in to struct f_hidg and make use of the cdev_device_{add,del}() helpers. This changes the lifetime of the device object to match struct f_hidg, but note that it is still added and deleted at the same time.
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
71adf118946957839a13aa4d1094183e05c6c094 to < 1cd7f156f6389918f760687fbbf133c86da93162affected71adf118946957839a13aa4d1094183e05c6c094 to < c78c87c4e389b62f8892af7f59857447aa6d9797affected71adf118946957839a13aa4d1094183e05c6c094 to < 1b6a53e447ec3d81623610c8c7ec5082b47dfdceaffected71adf118946957839a13aa4d1094183e05c6c094 to < d3136b79705c2e3bba9c76adc5628af0215d798eaffected71adf118946957839a13aa4d1094183e05c6c094 to < 9e4b85d815b14bd4db2deea2a54264a23de8b896affected71adf118946957839a13aa4d1094183e05c6c094 to < 9e08b7f5fa00e9d550851352bd0d1ba74ccffef2affected71adf118946957839a13aa4d1094183e05c6c094 to < 89ff3dfac604614287ad5aad9370c3f984ea3f4baffected
Linux Linux
Default version status: affected
2.6.35affected0 to < 2.6.35unaffected4.19.270 to ≤ 4.19.*unaffected5.4.229 to ≤ 5.4.*unaffected5.10.163 to ≤ 5.10.*unaffected5.15.86 to ≤ 5.15.*unaffected6.0.16 to ≤ 6.0.*unaffected6.1.2 to ≤ 6.1.*unaffected6.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/1cd7f156f6389918f760687fbbf133c86da93162 ↗
- https://git.kernel.org/stable/c/c78c87c4e389b62f8892af7f59857447aa6d9797 ↗
- https://git.kernel.org/stable/c/1b6a53e447ec3d81623610c8c7ec5082b47dfdce ↗
- https://git.kernel.org/stable/c/d3136b79705c2e3bba9c76adc5628af0215d798e ↗
- https://git.kernel.org/stable/c/9e4b85d815b14bd4db2deea2a54264a23de8b896 ↗
- https://git.kernel.org/stable/c/9e08b7f5fa00e9d550851352bd0d1ba74ccffef2 ↗
- https://git.kernel.org/stable/c/89ff3dfac604614287ad5aad9370c3f984ea3f4b ↗