{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-72067", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.903Z", "datePublished": "2026-08-15T05:52:20.268Z", "dateUpdated": "2026-10-16T15:53:19.472Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:39:59.754Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpu: hotplug: Preserve per instance callback errors\n\ncpuhp_invoke_callback() unwinds earlier callbacks for the same\nhotplug state when one instance fails. The rollback path currently\nreuses ret, so a successful rollback can hide the original error and\nmake the failed transition look successful.\n\nKeep the rollback result separate from the original error." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is in cpuhp_invoke_callback() during CPU hotplug state transitions, reached only via local kernel paths such as sysfs /sys/devices/system/cpu/cpuN/online, device_online/offline, and cpu_up()/cpu_down() from privileged local callers.\nAC:L - An attacker can reliably trigger the bug by inducing multi-instance callback failure (e.g., -ENOMEM via memory pressure) during CPU online/offline on cloud autoscaled nodes or servers running RAID/padata where rollback callbacks succeed and overwrite the original error.\nPR:L - CPU hotplug is normally admin-initiated, but an unprivileged local user can force multi-instance callback failures through memory exhaustion during system/hypervisor CPU hotplug without needing CAP_SYS_ADMIN or user-namespace admin capabilities.\nUI:N - Exploitation requires no victim interaction beyond normal system operation; it is triggered during kernel CPU hotplug transitions without the user opening files, mounting filesystems, or performing other deliberate actions.\nS:U - The vulnerability corrupts kernel CPU hotplug state-machine consistency and affects kernel subsystems on the same host; it does not cross a VM, container, or IOMMU security boundary to impact a separate authority.\nC:H - Silently completing hotplug after a failed multi-instance rollback leaves subsystems like padata and RAID5 in a state inconsistent with the hotplug machine, which can desynchronize RCU-protected structures and enable kernel memory disclosure primitives.\nI:H - When rollback overwrites the original error with success, cpuhp_up_callbacks()/cpuhp_down_callbacks() proceed and mark the CPU transition complete while multi-instance subsystem callbacks were only partially applied, corrupting kernel integrity and enabling further memory corruption.\nA:H - Proceeding past a failed multi-instance hotplug step while subsystems such as padata, RAID5, or virtio-net instances are left in an inconsistent partially-rolled-back state can cause kernel oops, panic, or hang on production cloud and server systems." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/cpu.c" ], "versions": [ { "version": "724a86881d03ee5794148e65142e24ed3621be66", "lessThan": "fe9c8d641f6991614d1229a3ffd3e33b879bba9c", "status": "affected", "versionType": "git" }, { "version": "724a86881d03ee5794148e65142e24ed3621be66", "lessThan": "ef39758637cc5b603fb05b625c45a98aa306e338", "status": "affected", "versionType": "git" }, { "version": "724a86881d03ee5794148e65142e24ed3621be66", "lessThan": "95232281512b15338549171ed9a2acf21f946ffb", "status": "affected", "versionType": "git" }, { "version": "724a86881d03ee5794148e65142e24ed3621be66", "lessThan": "7a68257b90d8a9b6d605abc99469ded45ecba63b", "status": "affected", "versionType": "git" }, { "version": "724a86881d03ee5794148e65142e24ed3621be66", "lessThan": "77d4fa8a3ea1c3e8b996ac35e59aee9e77389905", "status": "affected", "versionType": "git" }, { "version": "724a86881d03ee5794148e65142e24ed3621be66", "lessThan": "f77117530fc3f5932ffb107182a6dd34006be9b6", "status": "affected", "versionType": "git" }, { "version": "724a86881d03ee5794148e65142e24ed3621be66", "lessThan": "9f7dc355f62c011e4afe8286cf71130d4bfb9d80", "status": "affected", "versionType": "git" }, { "version": "724a86881d03ee5794148e65142e24ed3621be66", "lessThan": "673db10729fb121ea1b16fe57791a0cb9eac1eb5", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/cpu.c" ], "versions": [ { "version": "4.14", "status": "affected" }, { "version": "0", "lessThan": "4.14", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.5", "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": "4.14", "versionEndExcluding": "5.10.261" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/fe9c8d641f6991614d1229a3ffd3e33b879bba9c" }, { "url": "https://git.kernel.org/stable/c/ef39758637cc5b603fb05b625c45a98aa306e338" }, { "url": "https://git.kernel.org/stable/c/95232281512b15338549171ed9a2acf21f946ffb" }, { "url": "https://git.kernel.org/stable/c/7a68257b90d8a9b6d605abc99469ded45ecba63b" }, { "url": "https://git.kernel.org/stable/c/77d4fa8a3ea1c3e8b996ac35e59aee9e77389905" }, { "url": "https://git.kernel.org/stable/c/f77117530fc3f5932ffb107182a6dd34006be9b6" }, { "url": "https://git.kernel.org/stable/c/9f7dc355f62c011e4afe8286cf71130d4bfb9d80" }, { "url": "https://git.kernel.org/stable/c/673db10729fb121ea1b16fe57791a0cb9eac1eb5" } ], "title": "cpu: hotplug: Preserve per instance callback errors", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-72067", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-10-16T15:51:18.639735Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T15:53:19.472Z" } } ] } }