{"api_version":"1","generated_at":"2026-08-13T22:04:48+00:00","cve":"CVE-2026-68411","urls":{"html":"https://cve.report/CVE-2026-68411","api":"https://cve.report/api/cve/CVE-2026-68411.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-68411","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-68411"},"summary":{"title":"wifi: mac80211_hwsim: clamp virtio RX length before skb_put","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-10 13:20:34","updated_at":"2026-08-10 13:20:34"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/6dc76371a9a360c29de00df5b11563102d9d675a","name":"https://git.kernel.org/stable/c/6dc76371a9a360c29de00df5b11563102d9d675a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/82c5a30a66e2a7337d99476c67d6fc1a99c4250e","name":"https://git.kernel.org/stable/c/82c5a30a66e2a7337d99476c67d6fc1a99c4250e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/10a2b430f8f06ae14b9590b6f6faa6b588ef0654","name":"https://git.kernel.org/stable/c/10a2b430f8f06ae14b9590b6f6faa6b588ef0654","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fade308845c89f784da8a6780c1e77258488f1b6","name":"https://git.kernel.org/stable/c/fade308845c89f784da8a6780c1e77258488f1b6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/99dc05c75acc3c8cde8d89c5371f4b569de5ac62","name":"https://git.kernel.org/stable/c/99dc05c75acc3c8cde8d89c5371f4b569de5ac62","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-68411","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68411","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d44fe7c9808c56e136e59147bd932f5491520f1 82c5a30a66e2a7337d99476c67d6fc1a99c4250e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d44fe7c9808c56e136e59147bd932f5491520f1 fade308845c89f784da8a6780c1e77258488f1b6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d44fe7c9808c56e136e59147bd932f5491520f1 6dc76371a9a360c29de00df5b11563102d9d675a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d44fe7c9808c56e136e59147bd932f5491520f1 99dc05c75acc3c8cde8d89c5371f4b569de5ac62 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d44fe7c9808c56e136e59147bd932f5491520f1 10a2b430f8f06ae14b9590b6f6faa6b588ef0654 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.7","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.148 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.101 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.42 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.6 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc4 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/wireless/virtual/mac80211_hwsim_main.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"82c5a30a66e2a7337d99476c67d6fc1a99c4250e","status":"affected","version":"5d44fe7c9808c56e136e59147bd932f5491520f1","versionType":"git"},{"lessThan":"fade308845c89f784da8a6780c1e77258488f1b6","status":"affected","version":"5d44fe7c9808c56e136e59147bd932f5491520f1","versionType":"git"},{"lessThan":"6dc76371a9a360c29de00df5b11563102d9d675a","status":"affected","version":"5d44fe7c9808c56e136e59147bd932f5491520f1","versionType":"git"},{"lessThan":"99dc05c75acc3c8cde8d89c5371f4b569de5ac62","status":"affected","version":"5d44fe7c9808c56e136e59147bd932f5491520f1","versionType":"git"},{"lessThan":"10a2b430f8f06ae14b9590b6f6faa6b588ef0654","status":"affected","version":"5d44fe7c9808c56e136e59147bd932f5491520f1","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/wireless/virtual/mac80211_hwsim_main.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.7"},{"lessThan":"5.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.148","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.101","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc4","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.148","versionStartIncluding":"5.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.101","versionStartIncluding":"5.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.42","versionStartIncluding":"5.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.6","versionStartIncluding":"5.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc4","versionStartIncluding":"5.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-08-10T12:04:31.532Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/82c5a30a66e2a7337d99476c67d6fc1a99c4250e"},{"url":"https://git.kernel.org/stable/c/fade308845c89f784da8a6780c1e77258488f1b6"},{"url":"https://git.kernel.org/stable/c/6dc76371a9a360c29de00df5b11563102d9d675a"},{"url":"https://git.kernel.org/stable/c/99dc05c75acc3c8cde8d89c5371f4b569de5ac62"},{"url":"https://git.kernel.org/stable/c/10a2b430f8f06ae14b9590b6f6faa6b588ef0654"}],"title":"wifi: mac80211_hwsim: clamp virtio RX length before skb_put","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-68411","datePublished":"2026-08-10T12:04:31.532Z","dateReserved":"2026-07-30T09:28:09.391Z","dateUpdated":"2026-08-10T12:04:31.532Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-10 13:20:34","lastModifiedDate":"2026-08-10 13:20:34","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"68411","Ordinal":"1","Title":"wifi: mac80211_hwsim: clamp virtio RX length before skb_put","CVE":"CVE-2026-68411","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"68411","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"wifi: mac80211_hwsim: clamp virtio RX length before skb_put"}]}}}