CVE-2026-89964
parisc: eisa: Fix infinite loop when parsing invalid IRQ value
Description
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.
INFO
Published Date :
Sept. 16, 2026, 11:17 a.m.
Last Modified :
Sept. 17, 2026, 10:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Advance to the next entry after parsing.
- Stop parsing when no next entry exists.
- Apply the kernel patch to fix the parsing logic.
References to Advisories, Solutions, and Tools
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CVE-2026-89964.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-89964 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-2026-89964
weaknesses.
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The following table lists the changes that have been made to the
CVE-2026-89964 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.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 17, 2026
Action Type Old Value New Value Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/89xxx/CVE-2026-89964.json">CVE-2026-89964</a> -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 16, 2026
Action Type Old Value New Value Added Description 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. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/89xxx/CVE-2026-89964.json">CVE-2026-89964</a> Added Reference https://git.kernel.org/stable/c/16a62a3f2128b3d86fefc082d8f631becd02bff5 Added Reference https://git.kernel.org/stable/c/21f063e3c2b11fb9078ccdfd3b23634313ce4f0c Added Reference https://git.kernel.org/stable/c/3e2691eeee83a819125dba3f42c74e1b6730d5cd Added Reference https://git.kernel.org/stable/c/62d88e93ef5e1e04041e347945f7d7510eba1797 Added Reference https://git.kernel.org/stable/c/68659b627770f3c8d8f578e8ddee78a07d5f1d0e Added Reference https://git.kernel.org/stable/c/8640ade22369e248f77fbdd31a9d71b338499eef Added Reference https://git.kernel.org/stable/c/8b585431a16cfb9d8f2955a9fa0787ce3dceb3c2 Added Reference https://git.kernel.org/stable/c/bb10d54b74845eb4547baa1b9e908ecd32aa64e1