{"id":"CVE-2025-39718","revision":"f15fd71cbd984d1586c84b3d1a756917","records":[{"revision":"f15fd71cbd984d1586c84b3d1a756917","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-39718","aliases":[],"title":"vsock/virtio: Validate length in packet header before skb_put()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: Validate length in packet header before skb_put()\n\nWhen receiving a vsock packet in the guest, only the virtqueue buffer\nsize is validated prior to virtio_vsock_skb_rx_put(). Unfortunately,\nvirtio_vsock_skb_rx_put() uses the length from the packet header as the\nlength argument to skb_put(), potentially resulting in SKB overflow if\nthe host has gone wonky.\n\nValidate the length as advertised by the packet header before calling\nvirtio_vsock_skb_rx_put().","state":0,"publishedAt":"2025-09-05T17:21:25.959+00:00","modifiedAt":"2026-10-15T22:02:30.928+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/vmw_vsock/virtio_transport.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"baddcc2c71572968cdaeee1c4ab3dc0ad90fa765\",\n                            \"lessThan\": \"969b06bd8b7560efb100a34227619e7d318fbe05\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"71dc9ec9ac7d3eee785cdc986c3daeb821381e20\",\n                            \"lessThan\": \"ee438c492b2e0705d819ac0e25d04fae758d8f8f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"71dc9ec9ac7d3eee785cdc986c3daeb821381e20\",\n                            \"lessThan\": \"faf332a10372390ce65d0b803888f4b25a388335\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"71dc9ec9ac7d3eee785cdc986c3daeb821381e20\",\n                            \"lessThan\": \"676f03760ca1d69c2470cef36c44dc152494b47c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"71dc9ec9ac7d3eee785cdc986c3daeb821381e20\",\n                            \"lessThan\": \"0dab92484474587b82e8e0455839eaf5ac7bf894\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.1.63\",\n                            \"lessThan\": \"6.1.149\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/vmw_vsock/virtio_transport.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.3\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.3\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.149\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.103\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.44\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.16.4\",\n                            \"lessThanOrEqual\": \"6.16.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.17\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.4,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/969b06bd8b7560efb100a34227619e7d318fbe05","https://git.kernel.org/stable/c/ee438c492b2e0705d819ac0e25d04fae758d8f8f","https://git.kernel.org/stable/c/faf332a10372390ce65d0b803888f4b25a388335","https://git.kernel.org/stable/c/676f03760ca1d69c2470cef36c44dc152494b47c","https://git.kernel.org/stable/c/0dab92484474587b82e8e0455839eaf5ac7bf894"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-39718","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-39718","identifiers":["CVE-2025-39718"]},"retained":false,"historicalAffected":[]}],"coverage":[]}