{"id":"CVE-2025-21669","revision":"6d000e02facb47c4a46cb696e620a535","records":[{"revision":"6d000e02facb47c4a46cb696e620a535","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-21669","aliases":[],"title":"vsock/virtio: discard packets if the transport changes","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: discard packets if the transport changes\n\nIf the socket has been de-assigned or assigned to another transport,\nwe must discard any packets received because they are not expected\nand would cause issues when we access vsk->transport.\n\nA possible scenario is described by Hyunwoo Kim in the attached link,\nwhere after a first connect() interrupted by a signal, and a second\nconnect() failed, we can find `vsk->transport` at NULL, leading to a\nNULL pointer dereference.","state":0,"publishedAt":"2025-01-31T11:25:33.185+00:00","modifiedAt":"2026-10-15T01:02:55.148+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_common.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"c0cfa2d8a788fcf45df5bf4070ab2474c88d543a\",\n                            \"lessThan\": \"18a7fc371d1dbf8deff16c2dd9292bcc73f43040\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c0cfa2d8a788fcf45df5bf4070ab2474c88d543a\",\n                            \"lessThan\": \"6486915fa661584d70e8e7e4068c6c075c67dd6d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c0cfa2d8a788fcf45df5bf4070ab2474c88d543a\",\n                            \"lessThan\": \"88244163bc7e7b0ce9dd7bf4c8a563b41525c3ee\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c0cfa2d8a788fcf45df5bf4070ab2474c88d543a\",\n                            \"lessThan\": \"d88b249e14bd0ee1e46bbe4f456e22e01b8c68de\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c0cfa2d8a788fcf45df5bf4070ab2474c88d543a\",\n                            \"lessThan\": \"677579b641af109613564460a4e3bdcb16850b61\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c0cfa2d8a788fcf45df5bf4070ab2474c88d543a\",\n                            \"lessThan\": \"2cb7c756f605ec02ffe562fb26828e4bcc5fdfc1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\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_common.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.5\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.5\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.234\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.177\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.127\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.74\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.11\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.13\",\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:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/18a7fc371d1dbf8deff16c2dd9292bcc73f43040","https://git.kernel.org/stable/c/6486915fa661584d70e8e7e4068c6c075c67dd6d","https://git.kernel.org/stable/c/88244163bc7e7b0ce9dd7bf4c8a563b41525c3ee","https://git.kernel.org/stable/c/d88b249e14bd0ee1e46bbe4f456e22e01b8c68de","https://git.kernel.org/stable/c/677579b641af109613564460a4e3bdcb16850b61","https://git.kernel.org/stable/c/2cb7c756f605ec02ffe562fb26828e4bcc5fdfc1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-21669","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-21669","identifiers":["CVE-2025-21669"]},"retained":false,"historicalAffected":[]}],"coverage":[]}