{"id":"CVE-2026-68411","summary":"wifi: mac80211_hwsim: clamp virtio RX length before skb_put","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211_hwsim: clamp virtio RX length before skb_put\n\nhwsim_virtio_rx_work() passes the virtqueue used-ring length reported by\nthe device straight to skb_put() on a fixed-size receive skb. A backend\nreporting a length larger than the skb tailroom drives skb_put() past the\nbuffer end and hits skb_over_panic() -- a host-triggerable guest panic\n(denial of service).\n\nClamp the length to the skb's available room before skb_put(). A\nconforming device never reports more than the posted buffer size, so valid\nframes are unaffected; a truncated over-report then fails the\nlength/header checks in hwsim_virtio_handle_cmd() and is dropped, so\ntruncating rather than dropping here cannot be turned into a parsing\nproblem.","modified":"2026-08-21T03:30:31.705655112Z","published":"2026-08-10T12:04:31.532Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68411.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/10a2b430f8f06ae14b9590b6f6faa6b588ef0654"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5779e4a33e1666ddfeba43e96e29c4a9e5254ff0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6dc76371a9a360c29de00df5b11563102d9d675a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7f9d678b870fca8eaf1d46fa915cba0b1d5b387a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/82c5a30a66e2a7337d99476c67d6fc1a99c4250e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/909573d6a9b67354fc0515952574564e7c909c62"},{"type":"WEB","url":"https://git.kernel.org/stable/c/99dc05c75acc3c8cde8d89c5371f4b569de5ac62"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fade308845c89f784da8a6780c1e77258488f1b6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68411.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68411"},{"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":"5d44fe7c9808c56e136e59147bd932f5491520f1"},{"fixed":"7f9d678b870fca8eaf1d46fa915cba0b1d5b387a"},{"fixed":"909573d6a9b67354fc0515952574564e7c909c62"},{"fixed":"5779e4a33e1666ddfeba43e96e29c4a9e5254ff0"},{"fixed":"82c5a30a66e2a7337d99476c67d6fc1a99c4250e"},{"fixed":"fade308845c89f784da8a6780c1e77258488f1b6"},{"fixed":"6dc76371a9a360c29de00df5b11563102d9d675a"},{"fixed":"99dc05c75acc3c8cde8d89c5371f4b569de5ac62"},{"fixed":"10a2b430f8f06ae14b9590b6f6faa6b588ef0654"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68411.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.7.0"},{"fixed":"5.10.265"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.216"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.183"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.148"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.101"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.42"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68411.json"}}],"schema_version":"1.9.0"}