# CVE-2026-74309: linux: In the Linux kernel, the following vulnerability has been resolved:  vdpa/octeon_ep: fix IRQ-to-ring mapping in inter...

CVE-2026-74309 is fixed in linux on 1 platform by DEBIAN-CVE-2026-74309 (version 7.1.5-1), released August 15, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2026-74309
- Priority: Urgent
- CVSS: 10.0 (critical)
- EPSS: 0.0065
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 15, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler  Look up the IRQ index in oct_hw->irqs instead of assuming irq - irqs[0]. This supports non-contiguous IRQ numbers and avoids incorrect ring indexing when irqs[0] is not the base.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-74309](https://patchblox.com/security/data/fix/linux/debian-cve-2026-74309.md) | Aug 15, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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