CVE-2026-90063

CVE CVE-2026-90063EUVD EUVD-2026-81924Published 2026-09-17T16:05:46.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: virtio-net: Ensure that TCP packets don't overflow gso_segs The user can specify any gso_size in a packet crafted with an AF_PACKET PACKET_VNET_HDR socket, even smaller than TCP_MIN_GSO_SIZE = 8. At the same time, GSO_MAX_SIZE = 8 * GSO_MAX_SEGS = 8 * 65535. When the user crafts a packet with gso_size < 8, there is a risk for partial GSO to overflow the 16-bit gso_segs field when dividing the SKB length by gso_size. Adjust gso_size of TCP packets to be at least TCP_MIN_GSO_SIZE = 8. Keep gso_size of UDP GSO packets, as gso_size=1 is valid and explicitly tested at tools/testing/selftests/net/tun.c:649.

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 7c6d2ecbda83150b2036a2b36b21381ad4667762 <c27c449d455aafd9018a3cbab150f1c42c87923f; 5.6.18 <5.7; b3ebd9830c6026c98f03f7047c9d608573773f13; 7c6d2ecbda83150b2036a2b36b21381ad4667762 <d3d111fe809773edbb4ae121e36253b7d683509a; 7c6d2ecbda83150b2036a2b36b21381ad4667762 <29bd12c7c5f9d6cf855b87bace18f71e9607f9e8; 7c6d2ecbda83150b2036a2b36b21381ad4667762 <0e5ed3b98d1d8d251acfdccfeaa607453ad12954; 5.7; 7c6d2ecbda83150b2036a2b36b21381ad4667762 <8f6667a081887c2b59c6f3dd86c1789ada563762; patch: 6.1.188; patch: 6.6.157; patch: 6.18.52; patch: 7.2.6; 6c83456601e65a6dd371ddf595510183d198e9b1; patch: 0; 5.4.46 <5.5; patch: 7.3-rc1; patch: 6.12.110; 7c6d2ecbda83150b2036a2b36b21381ad4667762 <339f47ae04dcc6b5a730dd6bc70dddc8937c3260; 4.19.131 <4.20; bfbaf151efe491e30697e21c8b7ae1b615480873; patch: 5.15.221; 7c6d2ecbda83150b2036a2b36b21381ad4667762 <75c271c48f483af678e514734e10b2452410e08c; 4.14.187 <4.15; b96fb681ca789629b8ba3da99ca3b2e6fa807f0a

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

Does this concern one of your customers?

This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.

Try it for 28 days

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.