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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-90063

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

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 7c6d2ecbda83150b2036a2b36b21381ad4667762 to < d3d111fe809773edbb4ae121e36253b7d683509aaffected
  • 7c6d2ecbda83150b2036a2b36b21381ad4667762 to < 8f6667a081887c2b59c6f3dd86c1789ada563762affected
  • 7c6d2ecbda83150b2036a2b36b21381ad4667762 to < 339f47ae04dcc6b5a730dd6bc70dddc8937c3260affected
  • 7c6d2ecbda83150b2036a2b36b21381ad4667762 to < 29bd12c7c5f9d6cf855b87bace18f71e9607f9e8affected
  • 7c6d2ecbda83150b2036a2b36b21381ad4667762 to < 0e5ed3b98d1d8d251acfdccfeaa607453ad12954affected
  • 7c6d2ecbda83150b2036a2b36b21381ad4667762 to < 75c271c48f483af678e514734e10b2452410e08caffected
  • 7c6d2ecbda83150b2036a2b36b21381ad4667762 to < c27c449d455aafd9018a3cbab150f1c42c87923faffected
  • bfbaf151efe491e30697e21c8b7ae1b615480873affected
  • 6c83456601e65a6dd371ddf595510183d198e9b1affected
  • b3ebd9830c6026c98f03f7047c9d608573773f13affected
  • b96fb681ca789629b8ba3da99ca3b2e6fa807f0aaffected
  • 4.14.187 to < 4.15affected
  • 4.19.131 to < 4.20affected
  • 5.4.46 to < 5.5affected
  • 5.6.18 to < 5.7affected

Linux Linux

Default version status: affected

  • 5.7affected
  • 0 to < 5.7unaffected
  • 5.15.221 to ≤ 5.15.*unaffected
  • 6.1.188 to ≤ 6.1.*unaffected
  • 6.6.157 to ≤ 6.6.*unaffected
  • 6.12.110 to ≤ 6.12.*unaffected
  • 6.18.52 to ≤ 6.18.*unaffected
  • 7.2.6 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References