CVE-2026-90063

UNKNOWN 0.0

virtio-net: Ensure that TCP packets don't overflow gso_segs

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	linux
Product	linux
Ecosystems	Linux Kernel
Industries	Technology
Published	Sep 17, 2026

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Affected Versions

Linux / Linux

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

Linux / Linux

5.7

References

NVD ↗ CVE.org ↗ EPSS Data ↗

git.kernel.org: https://git.kernel.org/stable/c/d3d111fe809773edbb4ae121e36253b7d683509a git.kernel.org: https://git.kernel.org/stable/c/8f6667a081887c2b59c6f3dd86c1789ada563762 git.kernel.org: https://git.kernel.org/stable/c/339f47ae04dcc6b5a730dd6bc70dddc8937c3260 git.kernel.org: https://git.kernel.org/stable/c/29bd12c7c5f9d6cf855b87bace18f71e9607f9e8 git.kernel.org: https://git.kernel.org/stable/c/0e5ed3b98d1d8d251acfdccfeaa607453ad12954 git.kernel.org: https://git.kernel.org/stable/c/75c271c48f483af678e514734e10b2452410e08c git.kernel.org: https://git.kernel.org/stable/c/c27c449d455aafd9018a3cbab150f1c42c87923f