# CVE-2026-98275: net: ethernet: cortina: Ack RX overrun interrupt correctly

CVE-2026-98275 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-98275, released October 6, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2026-98275
- Priority: Urgent
- CVSS: 9.8 (Critical)
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 6, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98275

## Description

In the Linux kernel, the following vulnerability has been resolved:  net: ethernet: cortina: Ack RX overrun interrupt correctly  The RX overrun interrupt is reported in interrupt status register 4, but gmac_irq() acknowledges it using the RX descriptor error bit from status register 0. For GMAC0 this writes the GMAC1 overrun bit, while for GMAC1 the shift leaves no bit in the 32-bit register.  Acknowledge the same per-port RX overrun bit that was detected.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.190-1 | [DEBIAN-CVE-2026-98275](https://patchblox.com/security/data/fix/linux/debian-cve-2026-98275.md) | Oct 6, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.113-1 | [DEBIAN-CVE-2026-98275](https://patchblox.com/security/data/fix/linux/debian-cve-2026-98275.md) | Oct 6, 2026 |
| Linux | linux Debian 14 | 7.2.8-1 | [DEBIAN-CVE-2026-98275](https://patchblox.com/security/data/fix/linux/debian-cve-2026-98275.md) | Oct 6, 2026 |
| Linux | linux-6.12 Debian 12.15 (bookworm) | 6.12.113-1~deb12u1 | [DEBIAN-CVE-2026-98275](https://patchblox.com/security/data/fix/linux/debian-cve-2026-98275.md) | Oct 6, 2026 |

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Data as of 2026-11-09T07:25:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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