In the Linux kernel, the following vulnerability has been resolved: can: peak_usb:...
🔗 CVE IDs covered (1)
📋 Description
In the Linux kernel, the following vulnerability has been resolved:
can: peak_usb: peak_usb_start(): fix double free of transfer buffer on URB submit error
In peak_usb_start(), each RX URB transfer buffer is allocated with kmalloc() and the URB is flagged URB_FREE_BUFFER so that the final usb_free_urb() also frees the transfer buffer.
If usb_submit_urb() fails, the error path frees the buffer explicitly with kfree(buf) and then calls usb_free_urb(urb). Because URB_FREE_BUFFER is set, usb_free_urb() -> urb_destroy() frees the same buffer a second time, a double free of the transfer buffer.
BUG: KASAN: double-free in usb_free_urb.part.0+0x91/0xb0 Free of addr ffff8881069ccb80 by task trigger.sh/285
Call Trace: kfree+0x113/0x3c0 usb_free_urb.part.0+0x91/0xb0
Drop the redundant kfree(buf); usb_free_urb() already releases the transfer buffer. This mirrors commit 03819abbeb11 ("net: usb: lan78xx: Fix double free issue with interrupt buffer allocation").
🔗 References (10)
- https://nvd.nist.gov/vuln/detail/CVE-2026-74456
- https://git.kernel.org/stable/c/4bb3325075138dd5346b71589a959878b564dc0b
- https://git.kernel.org/stable/c/525640b93d3e5f82f4ebea4730f4e0cf799522ba
- https://git.kernel.org/stable/c/92d0de80ca2223b9c7da78020155b6cb27824cc0
- https://git.kernel.org/stable/c/9b3d5a6d952c38bbcf07f903cbeadefdb56b9bc9
- https://git.kernel.org/stable/c/dfb17bf04a764462000f11258a7c06aa92d1f261
- https://git.kernel.org/stable/c/5f2fa5840c34d3a558c57855781be75e03bef752
- https://git.kernel.org/stable/c/914c3b8fa175acf8476ad31cf04e308638e3578e
- https://git.kernel.org/stable/c/b9088d581fff971a7eb1628f8dcc30df6cfef4dc
- https://github.com/advisories/GHSA-crgv-x77w-rh88