CVE-2026-68182
comedi: comedi_parport: deal with premature interrupt
Description
In the Linux kernel, the following vulnerability has been resolved: comedi: comedi_parport: deal with premature interrupt Syzbot reported a general protection fault in `comedi_get_is_subdevice_running()`, which was called from the interrupt handler `parport_interrupt()` in the "comedi_parport" driver, but it does not currently have a C reproducer for the problem. It's probably due to a premature interrupt for one of two reasons: 1. The driver sets up the interrupt handler before the comedi subdevices used by the interrupt handler have been allocated, but does not disable the interrupt in the parallel port's CTRL register first. 2. The driver uses a user-supplied I/O port base address which Syzbot would have supplied, but it might not be backed by real parallel port hardware. Change the initialization order in the driver's comedi "attach" handler (`parport_attach()`) so that the hardware registers are initialized before the interrupt handler is requested. This should prevent premature interrupts occurring for real hardware. Also add a test to the interrupt handler to ensure the comedi device is fully attached and return early if it isn't.
INFO
Published Date :
Aug. 10, 2026, 1:20 p.m.
Last Modified :
Aug. 17, 2026, 5:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Initialize hardware registers before requesting interrupt handler.
- Add check in interrupt handler for fully attached comedi device.
- Return early from interrupt handler if device is not attached.
- Update comedi_parport driver initialization sequence.
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-2026-68182.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68182 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-2026-68182
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-2026-68182 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68182 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': '241ab6ad7108e51c67881f7881c5e46f0400cdb1', 'lessThan': 'b061bb4dca49fd93063359d3805387235818778c', 'versionType': 'git'}, {'status': 'affected', 'version': '241ab6ad7108e51c67881f7881c5e46f0400cdb1', 'lessThan': '086a9ae3c5df63ec11033a8c0b3f6a1fd295ddd1', 'versionType': 'git'}, {'status': 'affected', 'version': '241ab6ad7108e51c67881f7881c5e46f0400cdb1', 'lessThan': 'cf26dd2d841583c54a87005c4934b92fddb930c3', 'versionType': 'git'}, {'status': 'affected', 'version': '241ab6ad7108e51c67881f7881c5e46f0400cdb1', 'lessThan': '5d059ce0e6a2f6f8b97273499d47b8f917097b48', 'versionType': 'git'}, {'status': 'affected', 'version': '241ab6ad7108e51c67881f7881c5e46f0400cdb1', 'lessThan': '17221216ae8ce6a24e8a4e787382e3ebc81b88a8', 'versionType': 'git'}], 'programFiles': ['drivers/comedi/drivers/comedi_parport.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.29'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.29', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/comedi/drivers/comedi_parport.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '241ab6ad7108e51c67881f7881c5e46f0400cdb1', 'lessThan': 'b061bb4dca49fd93063359d3805387235818778c', 'versionType': 'git'}, {'status': 'affected', 'version': '241ab6ad7108e51c67881f7881c5e46f0400cdb1', 'lessThan': '086a9ae3c5df63ec11033a8c0b3f6a1fd295ddd1', 'versionType': 'git'}, {'status': 'affected', 'version': '241ab6ad7108e51c67881f7881c5e46f0400cdb1', 'lessThan': 'cf26dd2d841583c54a87005c4934b92fddb930c3', 'versionType': 'git'}, {'status': 'affected', 'version': '241ab6ad7108e51c67881f7881c5e46f0400cdb1', 'lessThan': '5d059ce0e6a2f6f8b97273499d47b8f917097b48', 'versionType': 'git'}, {'status': 'affected', 'version': '241ab6ad7108e51c67881f7881c5e46f0400cdb1', 'lessThan': '17221216ae8ce6a24e8a4e787382e3ebc81b88a8', 'versionType': 'git'}], 'programFiles': ['drivers/comedi/drivers/comedi_parport.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.29'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.29', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/comedi/drivers/comedi_parport.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 10, 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': '241ab6ad7108e51c67881f7881c5e46f0400cdb1', 'lessThan': 'b061bb4dca49fd93063359d3805387235818778c', 'versionType': 'git'}, {'status': 'affected', 'version': '241ab6ad7108e51c67881f7881c5e46f0400cdb1', 'lessThan': '086a9ae3c5df63ec11033a8c0b3f6a1fd295ddd1', 'versionType': 'git'}, {'status': 'affected', 'version': '241ab6ad7108e51c67881f7881c5e46f0400cdb1', 'lessThan': 'cf26dd2d841583c54a87005c4934b92fddb930c3', 'versionType': 'git'}, {'status': 'affected', 'version': '241ab6ad7108e51c67881f7881c5e46f0400cdb1', 'lessThan': '5d059ce0e6a2f6f8b97273499d47b8f917097b48', 'versionType': 'git'}, {'status': 'affected', 'version': '241ab6ad7108e51c67881f7881c5e46f0400cdb1', 'lessThan': '17221216ae8ce6a24e8a4e787382e3ebc81b88a8', 'versionType': 'git'}], 'programFiles': ['drivers/comedi/drivers/comedi_parport.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.29'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.29', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/comedi/drivers/comedi_parport.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: comedi: comedi_parport: deal with premature interrupt Syzbot reported a general protection fault in `comedi_get_is_subdevice_running()`, which was called from the interrupt handler `parport_interrupt()` in the "comedi_parport" driver, but it does not currently have a C reproducer for the problem. It's probably due to a premature interrupt for one of two reasons: 1. The driver sets up the interrupt handler before the comedi subdevices used by the interrupt handler have been allocated, but does not disable the interrupt in the parallel port's CTRL register first. 2. The driver uses a user-supplied I/O port base address which Syzbot would have supplied, but it might not be backed by real parallel port hardware. Change the initialization order in the driver's comedi "attach" handler (`parport_attach()`) so that the hardware registers are initialized before the interrupt handler is requested. This should prevent premature interrupts occurring for real hardware. Also add a test to the interrupt handler to ensure the comedi device is fully attached and return early if it isn't. Added Reference https://git.kernel.org/stable/c/086a9ae3c5df63ec11033a8c0b3f6a1fd295ddd1 Added Reference https://git.kernel.org/stable/c/17221216ae8ce6a24e8a4e787382e3ebc81b88a8 Added Reference https://git.kernel.org/stable/c/5d059ce0e6a2f6f8b97273499d47b8f917097b48 Added Reference https://git.kernel.org/stable/c/b061bb4dca49fd93063359d3805387235818778c Added Reference https://git.kernel.org/stable/c/cf26dd2d841583c54a87005c4934b92fddb930c3