Linux Kernel up to 7.2.4 EISA Subsystem eisa_irq_setup eisa_irq_edge infinite loop

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 7.2.4. Affected is the function eisa_irq_setup of the component EISA Subsystem. Performing a manipulation of the argument eisa_irq_edge results in infinite loop. This vulnerability is cataloged as CVE-2026-89964. The attack must be initiated from a local position. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.2.4. It has been classified as problematic. This affects the function eisa_irq_setup of the component EISA Subsystem. The manipulation of the argument eisa_irq_edge with an unknown input leads to a infinite loop vulnerability. CWE is classifying the issue as CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. This is going to have an impact on availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: parisc: eisa: Fix infinite loop when parsing invalid IRQ value When an invalid value is passed via the "eisa_irq_edge=" kernel command line parameter (e.g. "eisa_irq_edge=16,5"), eisa_irq_setup() prints an error message and continues without advancing the current position. As a result the same invalid value is parsed again and again, causing an infinite loop while the kernel boots. Advance to the next comma-separated entry, or stop parsing when there is no next entry, before continuing so that the remaining entries are processed normally.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-89964 since 09/11/2026. The exploitability is told to be easy. An attack has to be approached locally. Additional levels of successful authentication are needed for exploitation. Technical details are known, but no exploit is available.

Upgrading to version 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5 or 7.3-rc1 eliminates this vulnerability. Applying the patch 68659b627770f3c8d8f578e8ddee78a07d5f1d0e/8640ade22369e248f77fbdd31a9d71b338499eef/21f063e3c2b11fb9078ccdfd3b23634313ce4f0c/62d88e93ef5e1e04041e347945f7d7510eba1797/bb10d54b74845eb4547baa1b9e908ecd32aa64e1/3e2691eeee83a819125dba3f42c74e1b6730d5cd/16a62a3f2128b3d86fefc082d8f631becd02bff5/8b585431a16cfb9d8f2955a9fa0787ce3dceb3c2 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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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: 4.4
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
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: Infinite loop
CWE: CWE-835 / 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 5.10.270/5.15.221/6.1.188/6.6.157/6.12.110/6.18.51/7.2.5/7.3-rc1
Patch: 68659b627770f3c8d8f578e8ddee78a07d5f1d0e/8640ade22369e248f77fbdd31a9d71b338499eef/21f063e3c2b11fb9078ccdfd3b23634313ce4f0c/62d88e93ef5e1e04041e347945f7d7510eba1797/bb10d54b74845eb4547baa1b9e908ecd32aa64e1/3e2691eeee83a819125dba3f42c74e1b6730d5cd/16a62a3f2128b3d86fefc082d8f631becd02bff5/8b585431a16cfb9d8f2955a9fa0787ce3dceb3c2

Timelineinfo

09/11/2026 CVE reserved
09/16/2026 +5 days Advisory disclosed
09/16/2026 +0 days VulDB entry created
09/16/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-89964 (🔒)
GCVE (CVE): GCVE-0-2026-89964
GCVE (VulDB): GCVE-100-405789

Entryinfo

Created: 09/16/2026 14:57
Changes: 09/16/2026 14:57 (60)
Complete: 🔍
Cache ID: 216::103

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