Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: media: si470x: Fix use-after-free in si470x_int_in_callback() syzbot reported use-after-free in si470x_int_in_callback() [1]. This indicates that urb->context, which contains struct si470x_device object, is freed when si470x_int_in_callback() is called. The cause of this issue is that si470x_int_in_callback() is called for freed urb. si470x_usb_driver_probe() calls si470x_start_usb(), which then calls usb_submit_urb() and si470x_start(). If si470x_start_usb() fails, si470x_usb_driver_probe() doesn't kill urb, but it just frees struct si470x_device object, as depicted below: si470x_usb_driver_probe() ... si470x_start_usb() ... usb_submit_urb() retval = si470x_start() return retval if (retval < 0) free struct si470x_device object, but don't kill urb This patch fixes this issue by killing urb when si470x_start_usb() fails and urb is submitted. If si470x_start_usb() fails and urb is not submitted, i.e. submitting usb fails, it just frees struct si470x_device object.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 779471110c6f0f7f7c223fc696170ec750ac3531 before 146bd005ebb01ae190c22af050cb98623958c373; affected 779471110c6f0f7f7c223fc696170ec750ac3531 before 8c6151b8e8dd2d98ad2cd725d26d1e103d989891; affected 779471110c6f0f7f7c223fc696170ec750ac3531 before 52f54fe78cca24850a30865037250f63eb3d5bf7; affected 779471110c6f0f7f7c223fc696170ec750ac3531 before 0ca298d548461d29615f9a2b1309e8dcf4a352c6; affected 779471110c6f0f7f7c223fc696170ec750ac3531 before 1c6447d0fc68650e51586dde79b5090d9d77f13a; affected 779471110c6f0f7f7c223fc696170ec750ac3531 before 6c8aee0c8fcc6dda94315f7908e8fa9bc75abe75; affected 779471110c6f0f7f7c223fc696170ec750ac3531 before 63648a7bd1a7599bcc2040a6d1792363ae4c2e1b; affected 779471110c6f0f7f7c223fc696170ec750ac3531 before 92b0888398e4ba51d93b618a6506781f4e3879c9; affected 779471110c6f0f7f7c223fc696170ec750ac3531 before 7d21e0b1b41b21d628bf2afce777727bd4479aa5 |
| Linux / Linux | affected 3.6; unaffected 0 before 3.6; unaffected 4.9.337 through 4.9.*; unaffected 4.14.303 through 4.14.*; unaffected 4.19.270 through 4.19.*; unaffected 5.4.229 through 5.4.*; unaffected 5.10.163 through 5.10.*; unaffected 5.15.86 through 5.15.*; unaffected 6.0.16 through 6.0.*; unaffected 6.1.2 through 6.1.*; unaffected 6.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/146bd005ebb01ae190c22af050cb98623958c373
- https://git.kernel.org/stable/c/8c6151b8e8dd2d98ad2cd725d26d1e103d989891
- https://git.kernel.org/stable/c/52f54fe78cca24850a30865037250f63eb3d5bf7
- https://git.kernel.org/stable/c/0ca298d548461d29615f9a2b1309e8dcf4a352c6
- https://git.kernel.org/stable/c/1c6447d0fc68650e51586dde79b5090d9d77f13a
- https://git.kernel.org/stable/c/6c8aee0c8fcc6dda94315f7908e8fa9bc75abe75
- https://git.kernel.org/stable/c/63648a7bd1a7599bcc2040a6d1792363ae4c2e1b
- https://git.kernel.org/stable/c/92b0888398e4ba51d93b618a6506781f4e3879c9
- https://git.kernel.org/stable/c/7d21e0b1b41b21d628bf2afce777727bd4479aa5