1. Home
  2. Vulnerabilities
  3. CVE-2026-74459
0.0
NA
CVE-2026-74459
can: etas_es58x: es58x_read_bulk_callback(): fix RX buffer leak on URB resubmit failure
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: can: etas_es58x: es58x_read_bulk_callback(): fix RX buffer leak on URB resubmit failure es58x_read_bulk_callback() resubmits the RX URB after processing a received packet. If the resubmit succeeds, the URB remains anchored and will be handled by the normal RX path or by teardown. However, if usb_submit_urb() fails, the callback unanchors the URB and then returns directly. This skips the existing free_urb path, so the coherent transfer buffer allocated with usb_alloc_coherent() is not released. Reuse the existing free_urb path after a resubmit failure so that the RX coherent buffer is freed before leaving the callback.

Details
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
Impact
Affected Products

The following products are affected by CVE-2026-74459 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Free the RX coherent buffer after a failed URB resubmit to prevent leaks.
  • Ensure URB resubmit failures free the coherent buffer.
  • Reuse existing free_urb path after resubmit failures.
  • Release coherent transfer buffer on URB resubmit failure.
References
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-2026-74459.

URL Resource
https://git.kernel.org/stable/c/0ef136ba052101243ba117a1aca6f4a4c3a81142
https://git.kernel.org/stable/c/19c6c8c6cd5dd14fab5fcd744584812a57cbb78d
https://git.kernel.org/stable/c/7a0cf2b2497c757c3cb1286eddf2986abb0d387b
https://git.kernel.org/stable/c/b85e5c310382803d27adf6fe6554d4208bc8951c
https://git.kernel.org/stable/c/c311f17c261fd375ddf5755f2ebe1f022c19c5b0
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-74459 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-2026-74459 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-2026-74459 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-74459 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.

  • 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': 'f6e90c113c92e83fc0963d5e60e16b0e8a268981', 'lessThan': '0ef136ba052101243ba117a1aca6f4a4c3a81142', 'versionType': 'git'}, {'status': 'affected', 'version': 'b878444519fa03a3edd287d1963cf79ef78be2f1', 'lessThan': 'b85e5c310382803d27adf6fe6554d4208bc8951c', 'versionType': 'git'}, {'status': 'affected', 'version': '18eee279e9b5bff0db1aca9475ae4bc12804f05c', 'lessThan': 'c311f17c261fd375ddf5755f2ebe1f022c19c5b0', 'versionType': 'git'}, {'status': 'affected', 'version': '5eaad4f768266f1f17e01232ffe2ef009f8129b7', 'lessThan': '19c6c8c6cd5dd14fab5fcd744584812a57cbb78d', 'versionType': 'git'}, {'status': 'affected', 'version': '5eaad4f768266f1f17e01232ffe2ef009f8129b7', 'lessThan': '7a0cf2b2497c757c3cb1286eddf2986abb0d387b', 'versionType': 'git'}, {'status': 'affected', 'version': '7a0171b4921ad443fee5ed4fcb9d99fa4776edac', 'versionType': 'git'}, {'status': 'affected', 'version': '2185ea6e4ebcb61d1224dc7d187c59723cb5ad59', 'versionType': 'git'}, {'status': 'affected', 'version': 'b8f9ca88253574638bcff38900a4c28d570b1919', 'versionType': 'git'}, {'status': 'affected', 'version': '6.6.130', 'lessThan': '6.6.151', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.77', 'lessThan': '6.12.103', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.18.17', 'lessThan': '6.18.44', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.203', 'lessThan': '5.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.167', 'lessThan': '6.2', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.19.7', 'lessThan': '6.20', 'versionType': 'semver'}], 'programFiles': ['drivers/net/can/usb/etas_es58x/es58x_core.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '7.0'}, {'status': 'unaffected', 'version': '0', 'lessThan': '7.0', '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/etas_es58x/es58x_core.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: can: etas_es58x: es58x_read_bulk_callback(): fix RX buffer leak on URB resubmit failure es58x_read_bulk_callback() resubmits the RX URB after processing a received packet. If the resubmit succeeds, the URB remains anchored and will be handled by the normal RX path or by teardown. However, if usb_submit_urb() fails, the callback unanchors the URB and then returns directly. This skips the existing free_urb path, so the coherent transfer buffer allocated with usb_alloc_coherent() is not released. Reuse the existing free_urb path after a resubmit failure so that the RX coherent buffer is freed before leaving the callback.
    Added Reference https://git.kernel.org/stable/c/0ef136ba052101243ba117a1aca6f4a4c3a81142
    Added Reference https://git.kernel.org/stable/c/19c6c8c6cd5dd14fab5fcd744584812a57cbb78d
    Added Reference https://git.kernel.org/stable/c/7a0cf2b2497c757c3cb1286eddf2986abb0d387b
    Added Reference https://git.kernel.org/stable/c/b85e5c310382803d27adf6fe6554d4208bc8951c
    Added Reference https://git.kernel.org/stable/c/c311f17c261fd375ddf5755f2ebe1f022c19c5b0
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
No CVSS metrics available for this vulnerability.