Linux Kernel up to 7.2-rc4 comedi_parport parport_interrupt allocation of resources

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.44-

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5/7.2-rc4. Affected by this vulnerability is the function parport_interrupt of the component comedi_parport. Such manipulation leads to allocation of resources. This vulnerability is referenced as CVE-2026-68182. The attack can only be performed from a local environment. No exploit is available.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5/7.2-rc4. It has been rated as critical. Affected by this issue is the function parport_interrupt of the component comedi_parport. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. CVE summarizes:

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.

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2026-68182 since 07/30/2026. The exploitation is known to be easy. Local access is required to approach this attack. Technical details are known, but there is no available exploit.

Upgrading to version 6.6.148, 6.12.101, 6.18.42, 7.1.6 or 7.2-rc5 eliminates this vulnerability. Applying the patch b061bb4dca49fd93063359d3805387235818778c/086a9ae3c5df63ec11033a8c0b3f6a1fd295ddd1/cf26dd2d841583c54a87005c4934b92fddb930c3/5d059ce0e6a2f6f8b97273499d47b8f917097b48/17221216ae8ce6a24e8a4e787382e3ebc81b88a8 is able to eliminate this problem.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.148/6.12.101/6.18.42/7.1.6/7.2-rc5
Patch: b061bb4dca49fd93063359d3805387235818778c/086a9ae3c5df63ec11033a8c0b3f6a1fd295ddd1/cf26dd2d841583c54a87005c4934b92fddb930c3/5d059ce0e6a2f6f8b97273499d47b8f917097b48/17221216ae8ce6a24e8a4e787382e3ebc81b88a8

Timelineinfo

07/30/2026 CVE reserved
08/10/2026 +11 days Advisory disclosed
08/10/2026 +0 days VulDB entry created
08/10/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-68182 (🔒)
GCVE (CVE): GCVE-0-2026-68182
GCVE (VulDB): GCVE-100-387530

Entryinfo

Created: 08/10/2026 15:48
Changes: 08/10/2026 15:48 (59)
Complete: 🔍
Cache ID: 216::103

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