CVE-2026-74456

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-74456

Key Details

CVE	CVE-2026-74456
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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"). (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-74456
CVE	https://www.cve.org/CVERecord?id=CVE-2026-74456

Source

Reference

NVD

CVE