{"id":"CVE-2026-90063","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio-net: Ensure that TCP packets don't overflow gso_segs\n\nThe user can specify any gso_size in a packet crafted with an AF_PACKET\nPACKET_VNET_HDR socket, even smalle…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio-net: Ensure that TCP packets don't overflow gso_segs\n\nThe user can specify any gso_size in a packet crafted with an AF_PACKET\nPACKET_VNET_HDR socket, even smalle…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 7c6d2ecbda83150b2036a2b36b21381ad4667762 < d3d111fe809773edbb4ae121e36253b7d683509a","Linux >= 7c6d2ecbda83150b2036a2b36b21381ad4667762 < 8f6667a081887c2b59c6f3dd86c1789ada563762","Linux >= 7c6d2ecbda83150b2036a2b36b21381ad4667762 < 339f47ae04dcc6b5a730dd6bc70dddc8937c3260","Linux >= 7c6d2ecbda83150b2036a2b36b21381ad4667762 < 29bd12c7c5f9d6cf855b87bace18f71e9607f9e8","Linux >= 7c6d2ecbda83150b2036a2b36b21381ad4667762 < 0e5ed3b98d1d8d251acfdccfeaa607453ad12954","Linux >= 7c6d2ecbda83150b2036a2b36b21381ad4667762 < 75c271c48f483af678e514734e10b2452410e08c","Linux >= 7c6d2ecbda83150b2036a2b36b21381ad4667762 < c27c449d455aafd9018a3cbab150f1c42c87923f","Linux bfbaf151efe491e30697e21c8b7ae1b615480873","Linux 6c83456601e65a6dd371ddf595510183d198e9b1","Linux b3ebd9830c6026c98f03f7047c9d608573773f13","Linux b96fb681ca789629b8ba3da99ca3b2e6fa807f0a","Linux >= 4.14.187 < 4.15","Linux >= 4.19.131 < 4.20","Linux >= 5.4.46 < 5.5","Linux >= 5.6.18 < 5.7","Linux 5.7"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:16:55.080","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90063","references":[{"url":"https://git.kernel.org/stable/c/0e5ed3b98d1d8d251acfdccfeaa607453ad12954","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/29bd12c7c5f9d6cf855b87bace18f71e9607f9e8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/339f47ae04dcc6b5a730dd6bc70dddc8937c3260","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/75c271c48f483af678e514734e10b2452410e08c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8f6667a081887c2b59c6f3dd86c1789ada563762","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c27c449d455aafd9018a3cbab150f1c42c87923f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d3d111fe809773edbb4ae121e36253b7d683509a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.900Z","epss":0.00206,"epssPercentile":0.10948,"slug":"CVE-2026-90063","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nvirtio-net: Ensure that TCP packets don't overflow gso_segs\n\nThe user can specify any gso_size in a packet crafted with an AF_PACKET\nPACKET_VNET_HDR socket, even smaller than TCP_MIN_GSO_SIZE = 8. At the\nsame time, GSO_MAX_SIZE = 8 * GSO_MAX_SEGS = 8 * 65535. When the user\ncrafts a packet with gso_size < 8, there is a risk for partial GSO to\noverflow the 16-bit gso_segs field when dividing the SKB length by\ngso_size.\n\nAdjust gso_size of TCP packets to be at least TCP_MIN_GSO_SIZE = 8. Keep\ngso_size of UDP GSO packets, as gso_size=1 is valid and explicitly\ntested at tools/testing/selftests/net/tun.c:649.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}