In the Linux kernel, the following vulnerability has been resolved: PCI: plda: Fix IRQ domain leaks in the error paths of plda_init_interrupts()… (CVE-2026-89454)
A vulnerability in the Linux kernel's PCI plda driver was fixed to address IRQ domain leaks in the error handling paths of the plda_init_interrupts() function. The function failed to properly unwind and deinitialize IRQ domains if certain steps failed, potentially leaving IRQ mappings initialized incorrectly. The fix ensures that IRQ domains are properly removed on error by calling plda_pcie_irq_domain_deinit(), which disposes of interrupt mappings before removing domains.
AI Analysis
Technical Summary
The Linux kernel PCI plda driver contained a resource leak vulnerability in the plda_init_interrupts() function. Specifically, if platform_get_irq() or irq_create_mapping() failed during initialization, the IRQ domains were not deinitialized, causing IRQ domain leaks. Additionally, if irq_create_mapping() failed, the port->intx_irq remained initialized improperly. The patch introduces calls to plda_pcie_irq_domain_deinit() in error paths to properly clean up IRQ domains and mappings, preventing resource leaks. This issue was identified through automated code review by sashiko-bot.
Potential Impact
The vulnerability causes IRQ domain resource leaks in the Linux kernel PCI plda driver during error conditions in interrupt initialization. While it does not describe direct security exploitation or system compromise, resource leaks can lead to degraded system stability or denial of service over time if IRQ domains accumulate without proper cleanup.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to properly clean up IRQ domains in error paths of plda_init_interrupts(). Users should update to the fixed kernel version containing this patch. No additional mitigation is required beyond applying the official fix.
In the Linux kernel, the following vulnerability has been resolved: PCI: plda: Fix IRQ domain leaks in the error paths of plda_init_interrupts()… (CVE-2026-89454)
Description
A vulnerability in the Linux kernel's PCI plda driver was fixed to address IRQ domain leaks in the error handling paths of the plda_init_interrupts() function. The function failed to properly unwind and deinitialize IRQ domains if certain steps failed, potentially leaving IRQ mappings initialized incorrectly. The fix ensures that IRQ domains are properly removed on error by calling plda_pcie_irq_domain_deinit(), which disposes of interrupt mappings before removing domains.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel PCI plda driver contained a resource leak vulnerability in the plda_init_interrupts() function. Specifically, if platform_get_irq() or irq_create_mapping() failed during initialization, the IRQ domains were not deinitialized, causing IRQ domain leaks. Additionally, if irq_create_mapping() failed, the port->intx_irq remained initialized improperly. The patch introduces calls to plda_pcie_irq_domain_deinit() in error paths to properly clean up IRQ domains and mappings, preventing resource leaks. This issue was identified through automated code review by sashiko-bot.
Potential Impact
The vulnerability causes IRQ domain resource leaks in the Linux kernel PCI plda driver during error conditions in interrupt initialization. While it does not describe direct security exploitation or system compromise, resource leaks can lead to degraded system stability or denial of service over time if IRQ domains accumulate without proper cleanup.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to properly clean up IRQ domains in error paths of plda_init_interrupts(). Users should update to the fixed kernel version containing this patch. No additional mitigation is required beyond applying the official fix.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-ww3r-fjgm-2rcq
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-89454"]
Threat ID: 6aa4a02255bf5e2cf5a869a7
Added to database: 09/12/2026, 00:43:14 UTC
Last enriched: 09/12/2026, 01:16:37 UTC
Last updated: 09/12/2026, 01:16:37 UTC
Views: 2
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