Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 before d3d111fe809773edbb4ae121e36253b7d683509a; affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 before 8f6667a081887c2b59c6f3dd86c1789ada563762; affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 before 339f47ae04dcc6b5a730dd6bc70dddc8937c3260; affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 before 29bd12c7c5f9d6cf855b87bace18f71e9607f9e8; affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 before 0e5ed3b98d1d8d251acfdccfeaa607453ad12954; affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 before 75c271c48f483af678e514734e10b2452410e08c; affected 7c6d2ecbda83150b2036a2b36b21381ad4667762 before c27c449d455aafd9018a3cbab150f1c42c87923f; affected bfbaf151efe491e30697e21c8b7ae1b615480873; affected 6c83456601e65a6dd371ddf595510183d198e9b1; affected b3ebd9830c6026c98f03f7047c9d608573773f13; affected b96fb681ca789629b8ba3da99ca3b2e6fa807f0a; affected 4.14.187 before 4.15; affected 4.19.131 before 4.20; affected 5.4.46 before 5.5; affected 5.6.18 before 5.7 |
| Linux / Linux | affected 5.7; unaffected 0 before 5.7; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d3d111fe809773edbb4ae121e36253b7d683509a
- https://git.kernel.org/stable/c/8f6667a081887c2b59c6f3dd86c1789ada563762
- https://git.kernel.org/stable/c/339f47ae04dcc6b5a730dd6bc70dddc8937c3260
- https://git.kernel.org/stable/c/29bd12c7c5f9d6cf855b87bace18f71e9607f9e8
- https://git.kernel.org/stable/c/0e5ed3b98d1d8d251acfdccfeaa607453ad12954
- https://git.kernel.org/stable/c/75c271c48f483af678e514734e10b2452410e08c
- https://git.kernel.org/stable/c/c27c449d455aafd9018a3cbab150f1c42c87923f