AZL-96012
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-96012.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-96012
- Upstream
- Published
- 2026-08-15T13:17:50Z
- Modified
- 2026-09-22T05:34:53Z
- Summary
- CVE-2026-74456 affecting package kernel 6.6.150.1-1
- Details
-
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