CVE-2026-74457
can: peak_usb: add bounds check for USB channel index
Description
In the Linux kernel, the following vulnerability has been resolved: can: peak_usb: add bounds check for USB channel index The channel control index ctrl_idx is derived from rx->len which comes directly from a device USB payload. The mask 0x0f allows values 0-15, but the array size of usb_if->dev[] is only 2. Values 2-15 cause heap out-of-bounds read, eventually causing kernel panic in the IRQ context. Add bounds checking for ctrl_idx before the array access in both pcan_usb_pro_handle_canmsg() and pcan_usb_pro_handle_error().
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
- Update the Linux kernel to include the fix.
- Apply bounds checking for ctrl_idx.
- Verify array access after the fix.
- Reboot the system if necessary.
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-2026-74457.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74457 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-2026-74457
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-2026-74457 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74457 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': 'd8a199355f8f8a0797c00d98788d7282c9ea38bd', 'lessThan': '825c903ca3c98cd0cf0e3de8ab8f2604a5339b3f', 'versionType': 'git'}, {'status': 'affected', 'version': 'd8a199355f8f8a0797c00d98788d7282c9ea38bd', 'lessThan': 'f97b7e5e1cdaae15cd95b3a360028c7929664969', 'versionType': 'git'}, {'status': 'affected', 'version': 'd8a199355f8f8a0797c00d98788d7282c9ea38bd', 'lessThan': '1acab790b7cecd4e144d1d18bdfe549e282f6b0b', 'versionType': 'git'}, {'status': 'affected', 'version': 'd8a199355f8f8a0797c00d98788d7282c9ea38bd', 'lessThan': '0149fdb50a30944827acf9600a2cc44de0325a7f', 'versionType': 'git'}, {'status': 'affected', 'version': 'd8a199355f8f8a0797c00d98788d7282c9ea38bd', 'lessThan': '39132f166ca8ce00ae60d8a9068e06a60943cc4b', 'versionType': 'git'}], 'programFiles': ['drivers/net/can/usb/peak_usb/pcan_usb_pro.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.4'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.4', '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/peak_usb/pcan_usb_pro.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: can: peak_usb: add bounds check for USB channel index The channel control index ctrl_idx is derived from rx->len which comes directly from a device USB payload. The mask 0x0f allows values 0-15, but the array size of usb_if->dev[] is only 2. Values 2-15 cause heap out-of-bounds read, eventually causing kernel panic in the IRQ context. Add bounds checking for ctrl_idx before the array access in both pcan_usb_pro_handle_canmsg() and pcan_usb_pro_handle_error(). Added Reference https://git.kernel.org/stable/c/0149fdb50a30944827acf9600a2cc44de0325a7f Added Reference https://git.kernel.org/stable/c/1acab790b7cecd4e144d1d18bdfe549e282f6b0b Added Reference https://git.kernel.org/stable/c/39132f166ca8ce00ae60d8a9068e06a60943cc4b Added Reference https://git.kernel.org/stable/c/825c903ca3c98cd0cf0e3de8ab8f2604a5339b3f Added Reference https://git.kernel.org/stable/c/f97b7e5e1cdaae15cd95b3a360028c7929664969