CVE-2026-99216

{"id": "CVE-2026-99216", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.4, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.5}]}, "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": "74347a99e73ae00b8385f1209aaea193c670f901", "lessThan": "2939215d57bc8e4189290544fca78f3809ac3ef8", "versionType": "git"}, {"status": "affected", "version": "74347a99e73ae00b8385f1209aaea193c670f901", "lessThan": "a0ae955ba9a5067a157ebb8defb4a0a9cb1fc304", "versionType": "git"}, {"status": "affected", "version": "74347a99e73ae00b8385f1209aaea193c670f901", "lessThan": "deef3ab5129ae4c45662c957cdab3739eb047fb1", "versionType": "git"}, {"status": "affected", "version": "74347a99e73ae00b8385f1209aaea193c670f901", "lessThan": "2e5ffbf1e41abbf6e02ce28115107938f55ff646", "versionType": "git"}, {"status": "affected", "version": "74347a99e73ae00b8385f1209aaea193c670f901", "lessThan": "2732210132f92aca0622b5134027990a809279d5", "versionType": "git"}, {"status": "affected", "version": "74347a99e73ae00b8385f1209aaea193c670f901", "lessThan": "f47ce27af80b87cc684d5c12b65506af498ac7e5", "versionType": "git"}, {"status": "affected", "version": "74347a99e73ae00b8385f1209aaea193c670f901", "lessThan": "3195546a377c2d8d176d837e8baad5ce15d11195", "versionType": "git"}, {"status": "affected", "version": "74347a99e73ae00b8385f1209aaea193c670f901", "lessThan": "ec31dc39e835ccde0930daccece8c492d28282fc", "versionType": "git"}, {"status": "affected", "version": "5e059fc0f054309036d3f612bc8b0a502ca58545", "versionType": "git"}, {"status": "affected", "version": "9f38f7b46de0747c1909e8c557aa21715dce20c5", "versionType": "git"}, {"status": "affected", "version": "caeeb3787167c884b955404a7e669fd77f267e44", "versionType": "git"}, {"status": "affected", "version": "4.19.118", "lessThan": "4.20", "versionType": "semver"}, {"status": "affected", "version": "5.4.35", "lessThan": "5.5", "versionType": "semver"}, {"status": "affected", "version": "5.6.7", "lessThan": "5.7", "versionType": "semver"}], "programFiles": ["drivers/hv/connection.c", "drivers/hv/vmbus_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": "5.7"}, {"status": "unaffected", "version": "0", "lessThan": "5.7", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.273", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.224", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.191", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.161", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.115", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.59", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.2.13", "versionType": "semver", "lessThanOrEqual": "7.2.*"}, {"status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/hv/connection.c", "drivers/hv/vmbus_drv.c"], "defaultStatus": "affected"}]}], "published": "2026-10-28T11:17:43.160", "references": [{"url": "https://git.kernel.org/stable/c/2732210132f92aca0622b5134027990a809279d5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2939215d57bc8e4189290544fca78f3809ac3ef8", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2e5ffbf1e41abbf6e02ce28115107938f55ff646", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3195546a377c2d8d176d837e8baad5ce15d11195", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a0ae955ba9a5067a157ebb8defb4a0a9cb1fc304", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/deef3ab5129ae4c45662c957cdab3739eb047fb1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ec31dc39e835ccde0930daccece8c492d28282fc", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f47ce27af80b87cc684d5c12b65506af498ac7e5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nDrivers: hv: Don't reset VMBus connection state on error/exit paths\n\nIn two places, current code forces vmbus_connection.conn_state to\nDISCONNECTED prior to calling vmbus_disconnect(). But vmbus_disconnect()\ncalls vmbus_initiate_unload(), which unloads the VMBus connection\nonly if the conn_state is CONNECTED. Consequently, the connection\nremains and the Hyper-V host might continue to send messages or post\nVMBus interrupts.\n\nThe problem was introduced in commit 74347a99e73ae (\"x86/Hyper-V:\nUnload vmbus channel in hv panic callback\"), in that\nvmbus_initiate_unload() started checking the current connection\nstate before doing the unload. This commit removed some occurrences\nwhere conn_state was forced to DISCONNECTED, but these two remained,\napparently due to an oversight at the time.\n\nFix this by not forcing conn_state to DISCONNECTED during VMBus exit,\nor if a failure occurs when establishing the connection in the first\nplace. Whatever value conn_state has at the time is then read by\nvmbus_initiate_unload() to determine if there is a connection to\nbe unloaded."}], "lastModified": "2026-10-31T13:17:59.777", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}