CVE-2026-80998

CVE CVE-2026-80998EUVD EUVD-2026-76321Published 2026-09-11T19:42:52.000ZLast changed 2026-09-13T06:29:01.000ZCVSS 7.5

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: net: bnxt: ring the doorbell when SW USO exits early When a burst of packets is handed down to the driver, the driver defers the doorbell to the end by setting txr->kick_pending = 1. The normal TX path handles this, but the SW USO path can miss it if it returns early. If bnxt_sw_udp_gso_xmit runs but returns early with NETDEV_TX_BUSY and txr->kick_pending was previously set to 1, then the TX queue can stall because the driver wrote some BDs but never wrote the doorbell. The device won't know to do the TX which would generate the completion that would wake the queue back up. Simplify bnxt_sw_udp_gso_xmit to set txr->kick_pending in its success case and check the flag on return. The added check after bnxt_sw_udp_gso_xmit returns ensures that any pending doorbells are written handling both successful USO and any early returns, which prevents the TX queue stall mentioned above. This TX queue stall was observed on a production system with a netdev TX watchdog informing about the queue stall.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux cc5d90667db81474ed7a92a1b2fa3daec5559307 <48d1c9665db6e3d4aeca62eb669377162ebc6fdf; patch: 0; 7.1; cc5d90667db81474ed7a92a1b2fa3daec5559307 <4e15e89faac9f308baeb01f46c13a051814d2449; patch: 7.3-rc1; patch: 7.2.4

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

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