CVE-2026-68411

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68411", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.391Z", "datePublished": "2026-08-10T12:04:31.532Z", "dateUpdated": "2026-08-19T16:35:07.403Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:35:07.403Z"}, "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": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/virtual/mac80211_hwsim_main.c"], "versions": [{"version": "5d44fe7c9808c56e136e59147bd932f5491520f1", "lessThan": "7f9d678b870fca8eaf1d46fa915cba0b1d5b387a", "status": "affected", "versionType": "git"}, {"version": "5d44fe7c9808c56e136e59147bd932f5491520f1", "lessThan": "909573d6a9b67354fc0515952574564e7c909c62", "status": "affected", "versionType": "git"}, {"version": "5d44fe7c9808c56e136e59147bd932f5491520f1", "lessThan": "5779e4a33e1666ddfeba43e96e29c4a9e5254ff0", "status": "affected", "versionType": "git"}, {"version": "5d44fe7c9808c56e136e59147bd932f5491520f1", "lessThan": "82c5a30a66e2a7337d99476c67d6fc1a99c4250e", "status": "affected", "versionType": "git"}, {"version": "5d44fe7c9808c56e136e59147bd932f5491520f1", "lessThan": "fade308845c89f784da8a6780c1e77258488f1b6", "status": "affected", "versionType": "git"}, {"version": "5d44fe7c9808c56e136e59147bd932f5491520f1", "lessThan": "6dc76371a9a360c29de00df5b11563102d9d675a", "status": "affected", "versionType": "git"}, {"version": "5d44fe7c9808c56e136e59147bd932f5491520f1", "lessThan": "99dc05c75acc3c8cde8d89c5371f4b569de5ac62", "status": "affected", "versionType": "git"}, {"version": "5d44fe7c9808c56e136e59147bd932f5491520f1", "lessThan": "10a2b430f8f06ae14b9590b6f6faa6b588ef0654", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/virtual/mac80211_hwsim_main.c"], "versions": [{"version": "5.7", "status": "affected"}, {"version": "0", "lessThan": "5.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.265", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "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": 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"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"}}}}

{}

{"affected": [{"affectedData": [{"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": "7f9d678b870fca8eaf1d46fa915cba0b1d5b387a", "status": "affected", "version": "5d44fe7c9808c56e136e59147bd932f5491520f1", "versionType": "git"}, {"lessThan": "909573d6a9b67354fc0515952574564e7c909c62", "status": "affected", "version": "5d44fe7c9808c56e136e59147bd932f5491520f1", "versionType": "git"}, {"lessThan": "5779e4a33e1666ddfeba43e96e29c4a9e5254ff0", "status": "affected", "version": "5d44fe7c9808c56e136e59147bd932f5491520f1", "versionType": "git"}, {"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": "5.10.*", "status": "unaffected", "version": "5.10.265", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.216", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.183", "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", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-68411", "lastModified": "2026-08-19T17:20:48.810", "metrics": {}, "published": "2026-08-10T13:20:34.787", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/10a2b430f8f06ae14b9590b6f6faa6b588ef0654"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5779e4a33e1666ddfeba43e96e29c4a9e5254ff0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6dc76371a9a360c29de00df5b11563102d9d675a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7f9d678b870fca8eaf1d46fa915cba0b1d5b387a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/82c5a30a66e2a7337d99476c67d6fc1a99c4250e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/909573d6a9b67354fc0515952574564e7c909c62"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/99dc05c75acc3c8cde8d89c5371f4b569de5ac62"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fade308845c89f784da8a6780c1e77258488f1b6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: wifi: mac80211_hwsim: clamp virtio RX length before skb_put", "id": "2513473", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513473"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in the Linux kernel's mac80211_hwsim component. A malicious backend device could report an oversized receive length to the `hwsim_virtio_rx_work()` function. This could cause the system to write past the end of a buffer, leading to a kernel panic and a denial of service (DoS) for the guest system."], "name": "CVE-2026-68411", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68411\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68411\nhttps://lore.kernel.org/linux-cve-announce/2026081050-CVE-2026-68411-8001@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5d44fe7c9808c56e136e59147bd932f5491520f1,82c5a30a66e2a7337d99476c67d6fc1a99c4250e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5d44fe7c9808c56e136e59147bd932f5491520f1,fade308845c89f784da8a6780c1e77258488f1b6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5d44fe7c9808c56e136e59147bd932f5491520f1,6dc76371a9a360c29de00df5b11563102d9d675a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5d44fe7c9808c56e136e59147bd932f5491520f1,99dc05c75acc3c8cde8d89c5371f4b569de5ac62)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5d44fe7c9808c56e136e59147bd932f5491520f1,10a2b430f8f06ae14b9590b6f6faa6b588ef0654)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "5.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.148,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.101,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.42,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.6,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc4,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-10T16:30:05.108800+00:00", "updated": "2026-08-13T03:15:12.159013+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}