CVE-2026-31389

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It is not reachable by remote network traffic.\nAC:L - Although the failing per-CPU allocation is an uncommon error path, a local attacker can apply memory pressure and retry controller registration; there is no race requiring conditions outside the attacker's control.\nPR:L - Triggering a reprobe through usbfs or similar local device-management interfaces requires local access to the device node, but not real init-namespace root privileges in the strongest reasonable scenario. The resulting stale SPI controller sysfs attributes are also locally accessible.\nUI:N - No victim user action is required once the attacker can trigger the local probe path. The attacker performs the registration/reprobe and follow-on access themselves.\nS:U - The bug corrupts or exposes kernel SPI/driver-core state within the same kernel security authority. There is no VM escape, IOMMU bypass, or cross-authority boundary change.\nC:H - This is a use-after-free of SPI controller or driver resources left registered in driver core after probe failure. Per the kernel scoring guidance, UAF conditions are treated as capable of enabling kernel memory disclosure.\nI:H - The stale registered controller can reference freed driver resources and callbacks, creating memory-corruption/use-after-free conditions. Per the kernel scoring guidance, UAF is treated as potentially enabling arbitrary write or control-flow compromise.\nA:H - The bug can cause kernel crashes through stale sysfs/device access, NULL dereference, or unclocked register accesses after failed registration. Any such kernel oops or panic is high availability impact."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/spi/spi.c"], "versions": [{"version": "6598b91b5ac32bc756d7c3000a31f775d4ead1c4", "lessThan": "0e23f50086da7d0b183dfeac26021acfcdee086b", "status": "affected", "versionType": "git"}, {"version": "6598b91b5ac32bc756d7c3000a31f775d4ead1c4", "lessThan": "6bbd385b30c7fb6c7ee0669e9ada91490938c051", "status": "affected", "versionType": "git"}, {"version": "6598b91b5ac32bc756d7c3000a31f775d4ead1c4", "lessThan": "afe27c1f43aa57530011f419be6ddf71306565d2", "status": "affected", "versionType": "git"}, {"version": "6598b91b5ac32bc756d7c3000a31f775d4ead1c4", "lessThan": "80f3e8cd2b4ad355b2ad2024cf423f6d183404f7", "status": "affected", "versionType": "git"}, {"version": "6598b91b5ac32bc756d7c3000a31f775d4ead1c4", "lessThan": 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"6.19.10", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "6.0", "versionEndExcluding": "6.1.167"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.6.130"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12.78"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.18.20"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", 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There is no VM escape, IOMMU bypass, or cross-authority boundary change.\nC:H - This is a use-after-free of SPI controller or driver resources left registered in driver core after probe failure. Per the kernel scoring guidance, UAF conditions are treated as capable of enabling kernel memory disclosure.\nI:H - The stale registered controller can reference freed driver resources and callbacks, creating memory-corruption/use-after-free conditions. Per the kernel scoring guidance, UAF is treated as potentially enabling arbitrary write or control-flow compromise.\nA:H - The bug can cause kernel crashes through stale sysfs/device access, NULL dereference, or unclocked register accesses after failed registration. 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controlador\n\nAseg\u00farese de anular el registro del n\u00facleo del controlador tambi\u00e9n en el improbable caso de que falle la asignaci\u00f3n de estad\u00edsticas por CPU durante el registro del controlador para evitar el uso despu\u00e9s de liberaci\u00f3n (de recursos del controlador) y los accesos a registros sin reloj."}], "id": "CVE-2026-31389", "lastModified": "2026-11-10T13:18:50.243", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": 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{"bugzilla": {"description": "kernel: spi: fix use-after-free on controller registration failure", "id": "2454859", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2454859"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's Serial Peripheral Interface (SPI) subsystem. During controller registration, a use-after-free vulnerability can occur if the allocation of per-CPU statistics fails. This could allow a local attacker to cause system instability or a denial of service by accessing freed memory."], "name": "CVE-2026-31389", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31389\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31389\nhttps://lore.kernel.org/linux-cve-announce/2026040324-CVE-2026-31389-036b@gregkh/T"], "statement": "This vulnerability occurs only during an unlikely error path when per-CPU statistics allocation fails during SPI controller registration. Under normal system operation with adequate memory, this path is not exercised. The practical exploitability is very limited as it requires triggering a specific allocation failure during driver initialization.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6598b91b5ac32bc756d7c3000a31f775d4ead1c4,0e23f50086da7d0b183dfeac26021acfcdee086b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6598b91b5ac32bc756d7c3000a31f775d4ead1c4,6bbd385b30c7fb6c7ee0669e9ada91490938c051)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6598b91b5ac32bc756d7c3000a31f775d4ead1c4,afe27c1f43aa57530011f419be6ddf71306565d2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6598b91b5ac32bc756d7c3000a31f775d4ead1c4,80f3e8cd2b4ad355b2ad2024cf423f6d183404f7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6598b91b5ac32bc756d7c3000a31f775d4ead1c4,23b51bad2eb8787aa74324cfccefb258515ae5ba)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6598b91b5ac32bc756d7c3000a31f775d4ead1c4,8634e05b08ead636e926022f4a98416e13440df9)"}}], "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": "6.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.167,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.130,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.78,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.20,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.19.10,6.19.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0-rc5,*]"}}], "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": "2026-04-03T21:13:22.992528+00:00", "updated": "2026-05-20T16:30:14.813446+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}