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CVE-2026-68456
usb: atm: ueagle-atm: wait for pre-firmware load in .disconnect()
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: usb: atm: ueagle-atm: wait for pre-firmware load in .disconnect() ueagle-atm uses the asynchronous request_firmware_nowait() in .probe(), but does not wait for its completion, not even in .disconnect(); so, if the device is unplugged meanwhile, its teardown runs concurrently with that. Even though this inconsistency is worth addressing on its own, it has also triggered several bug reports in syzbot over the years (some auto-closed) where the firmware sysfs fallback mechanism (CONFIG_FW_LOADER_USER_HELPER) creates a firmware subdirectory in the device directory during its removal, which might hit unexpected conditions in kernfs, apparently, depending at which point the add and remove operations raced. (See links.) The pattern is: usb ?-?: Direct firmware load for ueagle-atm/eagle?.fw failed with error -2 usb ?-?: Falling back to sysfs fallback for: ueagle-atm/eagle?.fw <ERROR> Call trace: ... kernfs_create_dir_ns sysfs_create_dir_ns create_dir kobject_add_internal kobject_add_varg kobject_add class_dir_create_and_add get_device_parent device_add fw_load_sysfs_fallback fw_load_from_user_helper firmware_fallback_sysfs _request_firmware request_firmware_work_func ... (Some variations are observed, after fw_load_sysfs_fallback(), e.g., [1].) While the kernfs side is being looked at, the ueagle-atm side can be fixed by waiting for the pre-firmware load in the .disconnect() handler. This change has a similar approach to previous work by Andrey Tsygunka [2] (wait_for_completion() in .disconnect()), but it is relatively different in design/implementation; using the Originally-by tag for credit assignment. This has been tested with: - synthetic reproducer to check the error path; - USB gadget (virtual device) to check the firmware upload path; - QEMU device emulator to check the device ID re-enumeration path; (The latter two were written by Claude; no other code/text in this commit.) Links (year first reported): 2025 https://syzbot.org/bug?extid=ce1e5a1b4e086b43e56d 2025 https://syzbot.org/bug?extid=9af8471255ac36e34fd4 2024 https://syzbot.org/bug?extid=306212936b13e520679d 2023 https://syzkaller.appspot.com/bug?extid=457452d30bcdda75ead2 2022 https://syzbot.org/bug?extid=782984d6f1701b526edb 2021 https://syzbot.org/bug?id=f3f221579f4ef7e9691281f3c6f56c05f83e8490 2021 https://syzbot.org/bug?id=84d86f0d71394829df6fc53daf6642c045983881 2021 https://syzbot.org/bug?id=3302dc1c0e2b9c94f2e8edb404eabc9267bc6f90 [1] https://syzkaller.appspot.com/bug?extid=457452d30bcdda75ead2 [2] https://lore.kernel.org/lkml/[email protected]/

Details
INFO

Published Date :

Aug. 15, 2026, 6:17 a.m.

Last Modified :

Aug. 17, 2026, 6:17 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-68456 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
Fix race condition by waiting for firmware load completion in disconnect handler.
  • Ensure firmware load completion in .disconnect() handler.
  • Update the Linux kernel to the latest version.
  • Apply the specific patch addressing the race condition.
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-2026-68456.

URL Resource
https://git.kernel.org/stable/c/509b51327320bdeaef1969248177a446ded073ab
https://git.kernel.org/stable/c/76861031b43a18065d13f9ffb8595d25c7576005
https://git.kernel.org/stable/c/bbfedc84714064ea4845e6b76f96316eb5bb65d8
https://git.kernel.org/stable/c/c581e30ae5b332d8acef64475a211b3f82099941
https://git.kernel.org/stable/c/d85f19aaef42a03e3e4765d659c761c8750a7f23
https://git.kernel.org/stable/c/ddcdac47e1f2651c7be60e299f98faf981522797
https://git.kernel.org/stable/c/e2674dfbed8a30d57e2bc872c4bfa6c3eec918bf
https://git.kernel.org/stable/c/f2a6abc670104fc3e383ee3b1cf35c070485e3df
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-68456 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-2026-68456 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-2026-68456 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-2026-68456 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.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'd85f19aaef42a03e3e4765d659c761c8750a7f23', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': '76861031b43a18065d13f9ffb8595d25c7576005', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'bbfedc84714064ea4845e6b76f96316eb5bb65d8', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'f2a6abc670104fc3e383ee3b1cf35c070485e3df', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'c581e30ae5b332d8acef64475a211b3f82099941', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': '509b51327320bdeaef1969248177a446ded073ab', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'ddcdac47e1f2651c7be60e299f98faf981522797', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'e2674dfbed8a30d57e2bc872c4bfa6c3eec918bf', 'versionType': 'git'}], 'programFiles': ['drivers/usb/atm/ueagle-atm.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.16'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.16', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/usb/atm/ueagle-atm.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'd85f19aaef42a03e3e4765d659c761c8750a7f23', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': '76861031b43a18065d13f9ffb8595d25c7576005', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'bbfedc84714064ea4845e6b76f96316eb5bb65d8', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'f2a6abc670104fc3e383ee3b1cf35c070485e3df', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'c581e30ae5b332d8acef64475a211b3f82099941', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': '509b51327320bdeaef1969248177a446ded073ab', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'ddcdac47e1f2651c7be60e299f98faf981522797', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'e2674dfbed8a30d57e2bc872c4bfa6c3eec918bf', 'versionType': 'git'}], 'programFiles': ['drivers/usb/atm/ueagle-atm.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.16'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.16', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/usb/atm/ueagle-atm.c'], 'defaultStatus': 'affected'}]
  • 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': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'd85f19aaef42a03e3e4765d659c761c8750a7f23', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': '76861031b43a18065d13f9ffb8595d25c7576005', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'bbfedc84714064ea4845e6b76f96316eb5bb65d8', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'f2a6abc670104fc3e383ee3b1cf35c070485e3df', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'c581e30ae5b332d8acef64475a211b3f82099941', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': '509b51327320bdeaef1969248177a446ded073ab', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'ddcdac47e1f2651c7be60e299f98faf981522797', 'versionType': 'git'}, {'status': 'affected', 'version': 'b72458a80c75cab832248f536412f386e20a93a0', 'lessThan': 'e2674dfbed8a30d57e2bc872c4bfa6c3eec918bf', 'versionType': 'git'}], 'programFiles': ['drivers/usb/atm/ueagle-atm.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.16'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.16', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/usb/atm/ueagle-atm.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: usb: atm: ueagle-atm: wait for pre-firmware load in .disconnect() ueagle-atm uses the asynchronous request_firmware_nowait() in .probe(), but does not wait for its completion, not even in .disconnect(); so, if the device is unplugged meanwhile, its teardown runs concurrently with that. Even though this inconsistency is worth addressing on its own, it has also triggered several bug reports in syzbot over the years (some auto-closed) where the firmware sysfs fallback mechanism (CONFIG_FW_LOADER_USER_HELPER) creates a firmware subdirectory in the device directory during its removal, which might hit unexpected conditions in kernfs, apparently, depending at which point the add and remove operations raced. (See links.) The pattern is: usb ?-?: Direct firmware load for ueagle-atm/eagle?.fw failed with error -2 usb ?-?: Falling back to sysfs fallback for: ueagle-atm/eagle?.fw <ERROR> Call trace: ... kernfs_create_dir_ns sysfs_create_dir_ns create_dir kobject_add_internal kobject_add_varg kobject_add class_dir_create_and_add get_device_parent device_add fw_load_sysfs_fallback fw_load_from_user_helper firmware_fallback_sysfs _request_firmware request_firmware_work_func ... (Some variations are observed, after fw_load_sysfs_fallback(), e.g., [1].) While the kernfs side is being looked at, the ueagle-atm side can be fixed by waiting for the pre-firmware load in the .disconnect() handler. This change has a similar approach to previous work by Andrey Tsygunka [2] (wait_for_completion() in .disconnect()), but it is relatively different in design/implementation; using the Originally-by tag for credit assignment. This has been tested with: - synthetic reproducer to check the error path; - USB gadget (virtual device) to check the firmware upload path; - QEMU device emulator to check the device ID re-enumeration path; (The latter two were written by Claude; no other code/text in this commit.) Links (year first reported): 2025 https://syzbot.org/bug?extid=ce1e5a1b4e086b43e56d 2025 https://syzbot.org/bug?extid=9af8471255ac36e34fd4 2024 https://syzbot.org/bug?extid=306212936b13e520679d 2023 https://syzkaller.appspot.com/bug?extid=457452d30bcdda75ead2 2022 https://syzbot.org/bug?extid=782984d6f1701b526edb 2021 https://syzbot.org/bug?id=f3f221579f4ef7e9691281f3c6f56c05f83e8490 2021 https://syzbot.org/bug?id=84d86f0d71394829df6fc53daf6642c045983881 2021 https://syzbot.org/bug?id=3302dc1c0e2b9c94f2e8edb404eabc9267bc6f90 [1] https://syzkaller.appspot.com/bug?extid=457452d30bcdda75ead2 [2] https://lore.kernel.org/lkml/[email protected]/
    Added Reference https://git.kernel.org/stable/c/509b51327320bdeaef1969248177a446ded073ab
    Added Reference https://git.kernel.org/stable/c/76861031b43a18065d13f9ffb8595d25c7576005
    Added Reference https://git.kernel.org/stable/c/bbfedc84714064ea4845e6b76f96316eb5bb65d8
    Added Reference https://git.kernel.org/stable/c/c581e30ae5b332d8acef64475a211b3f82099941
    Added Reference https://git.kernel.org/stable/c/d85f19aaef42a03e3e4765d659c761c8750a7f23
    Added Reference https://git.kernel.org/stable/c/ddcdac47e1f2651c7be60e299f98faf981522797
    Added Reference https://git.kernel.org/stable/c/e2674dfbed8a30d57e2bc872c4bfa6c3eec918bf
    Added Reference https://git.kernel.org/stable/c/f2a6abc670104fc3e383ee3b1cf35c070485e3df
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
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