CVE-2026-68299

{"id": "CVE-2026-68299", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc", "lessThan": "2ddf51fcb6dd7d55ceef38e2e1a5ab2ab7fd47b0", "versionType": "git"}, {"status": "affected", "version": "45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc", "lessThan": "fbab6b73cc086e32698c86e43d1b16bf17d24c36", "versionType": "git"}, {"status": "affected", "version": "45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc", "lessThan": "28e382646417c7e2be9c9a7079eddf627ff52b90", "versionType": "git"}, {"status": "affected", "version": "45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc", "lessThan": "667b6e52048eaf4dbcf1707ed87ffd44abb9cb38", "versionType": "git"}, {"status": "affected", "version": "45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc", "lessThan": "28cb5d8d13b4c1faf3f688f62e5df82fe7b438d8", "versionType": "git"}, {"status": "affected", "version": "45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc", "lessThan": "4fdb0f162ccdbe9626863b10003855703253fa29", "versionType": "git"}, {"status": "affected", "version": "45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc", "lessThan": "b28596baf87e25a078789f1c05817c8a3bf71257", "versionType": "git"}, {"status": "affected", "version": "45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc", "lessThan": "34a71f5361fc3adb5b7138da78750b0d535a8252", "versionType": "git"}], "programFiles": ["drivers/net/vmxnet3/vmxnet3_drv.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.2"}, {"status": "unaffected", "version": "0", "lessThan": "4.2", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.265", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.216", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.183", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.148", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.101", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.42", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.6", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/vmxnet3/vmxnet3_drv.c"], "defaultStatus": "affected"}]}], "published": "2026-08-10T13:20:19.440", "references": [{"url": "https://git.kernel.org/stable/c/28cb5d8d13b4c1faf3f688f62e5df82fe7b438d8", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/28e382646417c7e2be9c9a7079eddf627ff52b90", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2ddf51fcb6dd7d55ceef38e2e1a5ab2ab7fd47b0", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/34a71f5361fc3adb5b7138da78750b0d535a8252", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4fdb0f162ccdbe9626863b10003855703253fa29", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/667b6e52048eaf4dbcf1707ed87ffd44abb9cb38", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b28596baf87e25a078789f1c05817c8a3bf71257", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/fbab6b73cc086e32698c86e43d1b16bf17d24c36", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvmxnet3: fix BUG_ON in vmxnet3_get_hdr_len() for Geneve packets\n\nvmxnet3_get_hdr_len() assumes gdesc->rcd.v4/v6/tcp always describe the\nouter header, but for a Geneve-encapsulated packet the device can set\nthem based on the inner header instead, signalled by the\nVMXNET3_RCD_HDR_INNER_SHIFT bit in the completion descriptor. Since the\nfunction never skips the outer encapsulation, this mismatch triggers:\n\n- BUG_ON(hdr.ipv4->protocol != IPPROTO_TCP), because the outer\n protocol is UDP (Geneve), not TCP.\n- BUG_ON(hdr.eth->h_proto != ...), when the tunnel's outer and inner\n IP versions differ (e.g. outer IPv6/inner IPv4 or vice versa).\n\nCheck VMXNET3_RCD_HDR_INNER_SHIFT up front and bail out, since the\nfunction cannot locate the inner header it would need to parse. Also\nconvert the remaining BUG_ON()s in this function to return 0\ndefensively."}], "lastModified": "2026-08-19T17:20:41.040", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}