Bug 2517049 (CVE-2026-74458) - CVE-2026-74458 kernel: can: kvaser_usb_leaf: kvaser_usb_leaf_wait_cmd(): validate received command extents
Summary: CVE-2026-74458 kernel: can: kvaser_usb_leaf: kvaser_usb_leaf_wait_cmd(): vali...
Keywords:
Status: NEW
Alias: CVE-2026-74458
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-15 12:47 UTC by OSIDB Bzimport
Modified: 2026-08-19 17:20 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:


Attachments (Terms of Use)

Description OSIDB Bzimport 2026-08-15 12:47:09 UTC
In the Linux kernel, the following vulnerability has been resolved:

can: kvaser_usb_leaf: kvaser_usb_leaf_wait_cmd(): validate received command extents

The wait and bulk receive paths walk variable-length commands from a
USB buffer. A nonzero command shorter than CMD_HEADER_LEN can still be
dispatched, and the wait path copies a matching command into a fixed
caller-owned struct kvaser_cmd using the device-provided length.

Reject nonzero commands that do not contain the fixed header or that
extend beyond the current USB buffer item. In the wait path, also reject
a matching command that exceeds the destination before copying it.

Comment 1 Mauro Matteo Cascella 2026-08-19 17:17:10 UTC
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081532-CVE-2026-74458-d4a5@gregkh/T


Note You need to log in before you can comment on or make changes to this bug.