{"id":"CVE-2026-68411","state":"PUBLISHED","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.","publishedAt":"2026-08-10T12:04:31.532Z","updatedAt":"2026-08-19T16:35:07.403Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5d44fe7c9808c56e136e59147bd932f5491520f1","status":"affected","lessThan":"7f9d678b870fca8eaf1d46fa915cba0b1d5b387a","versionType":"git"},{"version":"5d44fe7c9808c56e136e59147bd932f5491520f1","status":"affected","lessThan":"909573d6a9b67354fc0515952574564e7c909c62","versionType":"git"},{"version":"5d44fe7c9808c56e136e59147bd932f5491520f1","status":"affected","lessThan":"5779e4a33e1666ddfeba43e96e29c4a9e5254ff0","versionType":"git"},{"version":"5d44fe7c9808c56e136e59147bd932f5491520f1","status":"affected","lessThan":"82c5a30a66e2a7337d99476c67d6fc1a99c4250e","versionType":"git"},{"version":"5d44fe7c9808c56e136e59147bd932f5491520f1","status":"affected","lessThan":"fade308845c89f784da8a6780c1e77258488f1b6","versionType":"git"},{"version":"5d44fe7c9808c56e136e59147bd932f5491520f1","status":"affected","lessThan":"6dc76371a9a360c29de00df5b11563102d9d675a","versionType":"git"},{"version":"5d44fe7c9808c56e136e59147bd932f5491520f1","status":"affected","lessThan":"99dc05c75acc3c8cde8d89c5371f4b569de5ac62","versionType":"git"},{"version":"5d44fe7c9808c56e136e59147bd932f5491520f1","status":"affected","lessThan":"10a2b430f8f06ae14b9590b6f6faa6b588ef0654","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/virtual/mac80211_hwsim_main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.7","versionType":"semver"},{"version":"5.10.265","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/virtual/mac80211_hwsim_main.c"]}],"references":["https://git.kernel.org/stable/c/7f9d678b870fca8eaf1d46fa915cba0b1d5b387a","https://git.kernel.org/stable/c/909573d6a9b67354fc0515952574564e7c909c62","https://git.kernel.org/stable/c/5779e4a33e1666ddfeba43e96e29c4a9e5254ff0","https://git.kernel.org/stable/c/82c5a30a66e2a7337d99476c67d6fc1a99c4250e","https://git.kernel.org/stable/c/fade308845c89f784da8a6780c1e77258488f1b6","https://git.kernel.org/stable/c/6dc76371a9a360c29de00df5b11563102d9d675a","https://git.kernel.org/stable/c/99dc05c75acc3c8cde8d89c5371f4b569de5ac62","https://git.kernel.org/stable/c/10a2b430f8f06ae14b9590b6f6faa6b588ef0654"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/68xxx/CVE-2026-68411.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68411","state":"PUBLISHED","datePublished":"2026-08-10T12:04:31.532Z","dateUpdated":"2026-08-19T16:35:07.403Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-30T09:28:09.391Z"},"containers":{"cna":{"title":"wifi: mac80211_hwsim: clamp virtio RX length before skb_put","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5d44fe7c9808c56e136e59147bd932f5491520f1","status":"affected","lessThan":"7f9d678b870fca8eaf1d46fa915cba0b1d5b387a","versionType":"git"},{"version":"5d44fe7c9808c56e136e59147bd932f5491520f1","status":"affected","lessThan":"909573d6a9b67354fc0515952574564e7c909c62","versionType":"git"},{"version":"5d44fe7c9808c56e136e59147bd932f5491520f1","status":"affected","lessThan":"5779e4a33e1666ddfeba43e96e29c4a9e5254ff0","versionType":"git"},{"version":"5d44fe7c9808c56e136e59147bd932f5491520f1","status":"affected","lessThan":"82c5a30a66e2a7337d99476c67d6fc1a99c4250e","versionType":"git"},{"version":"5d44fe7c9808c56e136e59147bd932f5491520f1","status":"affected","lessThan":"fade308845c89f784da8a6780c1e77258488f1b6","versionType":"git"},{"version":"5d44fe7c9808c56e136e59147bd932f5491520f1","status":"affected","lessThan":"6dc76371a9a360c29de00df5b11563102d9d675a","versionType":"git"},{"version":"5d44fe7c9808c56e136e59147bd932f5491520f1","status":"affected","lessThan":"99dc05c75acc3c8cde8d89c5371f4b569de5ac62","versionType":"git"},{"version":"5d44fe7c9808c56e136e59147bd932f5491520f1","status":"affected","lessThan":"10a2b430f8f06ae14b9590b6f6faa6b588ef0654","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/virtual/mac80211_hwsim_main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.7","versionType":"semver"},{"version":"5.10.265","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/virtual/mac80211_hwsim_main.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/7f9d678b870fca8eaf1d46fa915cba0b1d5b387a"},{"url":"https://git.kernel.org/stable/c/909573d6a9b67354fc0515952574564e7c909c62"},{"url":"https://git.kernel.org/stable/c/5779e4a33e1666ddfeba43e96e29c4a9e5254ff0"},{"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-19T16:35:07.403Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.10.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.6.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.12.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}