Linux Kernel up to 7.0.6/7.1-rc2 pseries ioctl deadlock

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k1.95-

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 7.0.6/7.1-rc2. Affected by this issue is some unknown functionality of the component pseries. Such manipulation of the argument ioctl leads to deadlock. This vulnerability is referenced as CVE-2026-46298. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.0.6/7.1-rc2. It has been rated as critical. Affected by this issue is an unknown part of the component pseries. The manipulation of the argument ioctl with an unknown input leads to a deadlock vulnerability. Using CWE to declare the problem leads to CWE-833. The product contains multiple threads or executable segments that are waiting for each other to release a necessary lock, resulting in deadlock. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: pseries/papr-hvpipe: Fix race with interrupt handler While executing ->ioctl handler or ->release handler, if an interrupt fires on the same cpu, then we can enter into a deadlock. This patch fixes both these handlers to take spin_lock_irq{save|restore} versions of the lock to prevent this deadlock.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2026-46298 since 05/13/2026. The exploitation is known to be difficult. There are known technical details, but no exploit is available.

Upgrading to version 7.0.7 or 7.1-rc3 eliminates this vulnerability. Applying the patch 342c966f81cfc3cb6c297e80b37a9f3a5d637d2c/7a4f0846ee6cc8cf44ae0046ed42e3259d1dd45b is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Deadlock
CWE: CWE-833 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

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 7.0.7/7.1-rc3
Patch: 342c966f81cfc3cb6c297e80b37a9f3a5d637d2c/7a4f0846ee6cc8cf44ae0046ed42e3259d1dd45b

Timelineinfo

05/13/2026 CVE reserved
06/08/2026 +26 days Advisory disclosed
06/08/2026 +0 days VulDB entry created
06/08/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-46298 (🔒)
GCVE (CVE): GCVE-0-2026-46298
GCVE (VulDB): GCVE-100-369260

Entryinfo

Created: 06/08/2026 20:15
Changes: 06/08/2026 20:15 (59)
Complete: 🔍
Cache ID: 216::103

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