Answer in brief
CVE-2026-90063 records a Unknown severity vulnerability in virtio-net: Ensure that TCP packets don't overflow gso_segs. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=7c6d2ecbda83150b2036a2b36b21381ad4667762 <d3d111fe809773edbb4ae121e36253b7d683509a || >=7c6d2ecbda83150b2036a2b36b21381ad4667762 <8f6667a081887c2b59c6f3dd86c1789ada563762 || >=7c6d2ecbda83150b2036a2b36b21381ad4667762 <339f47ae04dcc6b5a730dd6bc70dddc8937c3260 || >=7c6d2ecbda83150b2036a2b36b21381ad4667762 <29bd12c7c5f9d6cf855b87bace18f71e9607f9e8 || >=7c6d2ecbda83150b2036a2b36b21381ad4667762 <0e5ed3b98d1d8d251acfdccfeaa607453ad12954 || >=7c6d2ecbda83150b2036a2b36b21381ad4667762 <75c271c48f483af678e514734e10b2452410e08c || >=7c6d2ecbda83150b2036a2b36b21381ad4667762 <c27c449d455aafd9018a3cbab150f1c42c87923f || bfbaf151efe491e30697e21c8b7ae1b615480873 || 6c83456601e65a6dd371ddf595510183d198e9b1 || b3ebd9830c6026c98f03f7047c9d608573773f13 || b96fb681ca789629b8ba3da99ca3b2e6fa807f0a || >=4.14.187 <4.15 || >=4.19.131 <4.20 || >=5.4.46 <5.5 || >=5.6.18 <5.7 | d3d111fe809773edbb4ae121e36253b7d683509a, 8f6667a081887c2b59c6f3dd86c1789ada563762, 339f47ae04dcc6b5a730dd6bc70dddc8937c3260, 29bd12c7c5f9d6cf855b87bace18f71e9607f9e8, 0e5ed3b98d1d8d251acfdccfeaa607453ad12954, 75c271c48f483af678e514734e10b2452410e08c, c27c449d455aafd9018a3cbab150f1c42c87923f, 4.15, 4.20, 5.5, 5.7 |
| Linux/Linuxgeneric | 5.7 | Not reported |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
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.
Quoted source text, attributed separately from HOL analysis.