{"id":"CVE-2025-40236","summary":"virtio-net: zero unused hash fields","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio-net: zero unused hash fields\n\nWhen GSO tunnel is negotiated virtio_net_hdr_tnl_from_skb() tries to\ninitialize the tunnel metadata but forget to zero unused rxhash\nfields. This may leak information to another side. Fixing this by\nzeroing the unused hash fields.","modified":"2026-04-02T12:48:20.250915Z","published":"2025-12-04T15:31:26.497Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40236.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/b2284768c6b32aa224ca7d0ef0741beb434f03aa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b625d231c66a6041e98817ffc944bf6e4c45b2e3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40236.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-40236"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a2fb4bc4e2a6a031683910d85b278c1d25ae5420"},{"fixed":"b625d231c66a6041e98817ffc944bf6e4c45b2e3"},{"fixed":"b2284768c6b32aa224ca7d0ef0741beb434f03aa"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40236.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.17.0"},{"fixed":"6.17.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40236.json"}}],"schema_version":"1.7.5"}