CVE-2026-74458
can: kvaser_usb_leaf: kvaser_usb_leaf_wait_cmd(): validate received command extents
Description
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.
INFO
Published Date :
Aug. 15, 2026, 1:17 p.m.
Last Modified :
Aug. 15, 2026, 1:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Apply kernel patches to validate command extents.
- Ensure commands are validated before copying.
- Reject invalid commands early in the process.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-74458.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74458 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-74458
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-74458 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74458 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '080f40a6fa28dab299da7a652e444b1e2d9231e7', 'lessThan': '695aea154bb2d453e6daada1510972fafd075285', 'versionType': 'git'}, {'status': 'affected', 'version': '080f40a6fa28dab299da7a652e444b1e2d9231e7', 'lessThan': '3d0897ec623e422695d70d80ae456f89476c5328', 'versionType': 'git'}, {'status': 'affected', 'version': '080f40a6fa28dab299da7a652e444b1e2d9231e7', 'lessThan': '185cb1fa38142a3cbf223dd8b3abb24217f330d3', 'versionType': 'git'}, {'status': 'affected', 'version': '080f40a6fa28dab299da7a652e444b1e2d9231e7', 'lessThan': '21f0465fd86d77794aaed8e05f833634f68d178d', 'versionType': 'git'}, {'status': 'affected', 'version': '080f40a6fa28dab299da7a652e444b1e2d9231e7', 'lessThan': '0293dd153f9dbc1ddf5dacdccc76b363bce4a8ee', 'versionType': 'git'}], 'programFiles': ['drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c'], 'defaultStatus': 'affected'}] Added Description 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. Added Reference https://git.kernel.org/stable/c/0293dd153f9dbc1ddf5dacdccc76b363bce4a8ee Added Reference https://git.kernel.org/stable/c/185cb1fa38142a3cbf223dd8b3abb24217f330d3 Added Reference https://git.kernel.org/stable/c/21f0465fd86d77794aaed8e05f833634f68d178d Added Reference https://git.kernel.org/stable/c/3d0897ec623e422695d70d80ae456f89476c5328 Added Reference https://git.kernel.org/stable/c/695aea154bb2d453e6daada1510972fafd075285