CVE-2026-64428

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64428", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.787Z", "datePublished": "2026-07-25T08:51:05.460Z", "dateUpdated": "2026-08-17T04:55:28.748Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:55:28.748Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: sch: use raw_spinlock_t in the irq startup path\n\nsch_irq_unmask() enables the GPIO IRQ and then updates the controller\nstate through sch_irq_mask_unmask(), which takes sch->lock with\nspin_lock_irqsave(). The callback can be reached from irq_startup()\nwhile setting up a requested IRQ. That path is not sleepable, but on\nPREEMPT_RT a regular spinlock_t becomes a sleeping lock.\n\nThis issue was found by our static analysis tool and then manually\nreviewed against the current tree.\n\nThe grounded PoC kept the request_threaded_irq() -> __setup_irq() ->\nirq_startup() -> sch_irq_unmask() -> sch_irq_mask_unmask() carrier and\nused the original spin_lock_irqsave(&sch->lock) edge. Lockdep reported:\n\n BUG: sleeping function called from invalid context\n hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv]\n sch_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv]\n sch_irq_mask_unmask.constprop.0+0x31/0x70 [vuln_msv]\n __setup_irq.constprop.0+0xd/0x30 [vuln_msv]\n\nConvert the SCH controller lock to raw_spinlock_t. The same lock is\nalso used by the GPIO direction and value callbacks, but those critical\nsections only update MMIO-backed GPIO registers and do not contain\nsleepable operations. Keeping this register lock non-sleeping is\ntherefore appropriate for the irqchip callbacks and does not change the\nGPIO-side locking contract."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpio/gpio-sch.c"], "versions": [{"version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19", "lessThan": "3b1aa05ec27eeccc889ecaa3f2d9baa9f453e50d", "status": "affected", "versionType": "git"}, {"version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19", "lessThan": "4f03a15cc73c83740fc355ee22b336492d17b4da", "status": "affected", "versionType": "git"}, {"version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19", "lessThan": "7a550256d68bbdfa0903ab1c4595c04a6815493a", "status": "affected", "versionType": "git"}, {"version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19", "lessThan": "a235cec779bb39ec8f961a935b28a2ce278c6c64", "status": "affected", "versionType": "git"}, {"version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19", "lessThan": "4508366ab7dd0c2917a51a9c2e23cc1b9d35157a", "status": "affected", "versionType": "git"}, {"version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19", "lessThan": "41cad91a09d69e8fff4e936db29b1054b4e9f9f7", "status": "affected", "versionType": "git"}, {"version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19", "lessThan": "286533cb14a3c8a8bd39ff64ea2fc8e1aa0f638b", "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/gpio/gpio-sch.c"], "versions": [{"version": "5.13", "status": "affected"}, {"version": "0", "lessThan": "5.13", "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": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "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": "5.13", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3b1aa05ec27eeccc889ecaa3f2d9baa9f453e50d"}, {"url": "https://git.kernel.org/stable/c/4f03a15cc73c83740fc355ee22b336492d17b4da"}, {"url": "https://git.kernel.org/stable/c/7a550256d68bbdfa0903ab1c4595c04a6815493a"}, {"url": "https://git.kernel.org/stable/c/a235cec779bb39ec8f961a935b28a2ce278c6c64"}, {"url": "https://git.kernel.org/stable/c/4508366ab7dd0c2917a51a9c2e23cc1b9d35157a"}, {"url": "https://git.kernel.org/stable/c/41cad91a09d69e8fff4e936db29b1054b4e9f9f7"}, {"url": "https://git.kernel.org/stable/c/286533cb14a3c8a8bd39ff64ea2fc8e1aa0f638b"}], "title": "gpio: sch: use raw_spinlock_t in the irq startup path", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpio/gpio-sch.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "3b1aa05ec27eeccc889ecaa3f2d9baa9f453e50d", "status": "affected", "version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19", "versionType": "git"}, {"lessThan": "4f03a15cc73c83740fc355ee22b336492d17b4da", "status": "affected", "version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19", "versionType": "git"}, {"lessThan": "7a550256d68bbdfa0903ab1c4595c04a6815493a", "status": "affected", "version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19", "versionType": "git"}, {"lessThan": "a235cec779bb39ec8f961a935b28a2ce278c6c64", "status": "affected", "version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19", "versionType": "git"}, {"lessThan": "4508366ab7dd0c2917a51a9c2e23cc1b9d35157a", "status": "affected", "version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19", "versionType": "git"}, {"lessThan": "41cad91a09d69e8fff4e936db29b1054b4e9f9f7", "status": "affected", "version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19", "versionType": "git"}, {"lessThan": "286533cb14a3c8a8bd39ff64ea2fc8e1aa0f638b", "status": "affected", "version": "7a81638485c1a62a87b4c391ecc9c651a4a9dc19", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpio/gpio-sch.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.13"}, {"lessThan": "5.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.39", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "02B14F1C-E9D7-41F3-9237-FEA75A390AC7", "versionEndExcluding": "5.15.212", "versionStartIncluding": "5.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "092233C7-F4E0-40C8-BD4D-A28FE50DFE20", "versionEndExcluding": "6.1.178", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "7046B092-F810-4440-ACE6-60218518EECE", "versionEndExcluding": "6.6.145", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "05880CF6-5AD2-44E9-853A-6CE8318E76A5", "versionEndExcluding": "6.12.97", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "914AE4BC-3D59-4C5A-9DB5-9CE327B429F7", "versionEndExcluding": "6.18.39", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6228DDD6-4557-4AA3-9F43-AB995D471E42", "versionEndExcluding": "7.1.4", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: sch: use raw_spinlock_t in the irq startup path\n\nsch_irq_unmask() enables the GPIO IRQ and then updates the controller\nstate through sch_irq_mask_unmask(), which takes sch->lock with\nspin_lock_irqsave(). The callback can be reached from irq_startup()\nwhile setting up a requested IRQ. That path is not sleepable, but on\nPREEMPT_RT a regular spinlock_t becomes a sleeping lock.\n\nThis issue was found by our static analysis tool and then manually\nreviewed against the current tree.\n\nThe grounded PoC kept the request_threaded_irq() -> __setup_irq() ->\nirq_startup() -> sch_irq_unmask() -> sch_irq_mask_unmask() carrier and\nused the original spin_lock_irqsave(&sch->lock) edge. Lockdep reported:\n\n BUG: sleeping function called from invalid context\n hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv]\n sch_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv]\n sch_irq_mask_unmask.constprop.0+0x31/0x70 [vuln_msv]\n __setup_irq.constprop.0+0xd/0x30 [vuln_msv]\n\nConvert the SCH controller lock to raw_spinlock_t. The same lock is\nalso used by the GPIO direction and value callbacks, but those critical\nsections only update MMIO-backed GPIO registers and do not contain\nsleepable operations. Keeping this register lock non-sleeping is\ntherefore appropriate for the irqchip callbacks and does not change the\nGPIO-side locking contract."}], "id": "CVE-2026-64428", "lastModified": "2026-09-04T14:54:27.377", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-07-25T10:17:26.947", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/286533cb14a3c8a8bd39ff64ea2fc8e1aa0f638b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3b1aa05ec27eeccc889ecaa3f2d9baa9f453e50d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/41cad91a09d69e8fff4e936db29b1054b4e9f9f7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4508366ab7dd0c2917a51a9c2e23cc1b9d35157a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4f03a15cc73c83740fc355ee22b336492d17b4da"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7a550256d68bbdfa0903ab1c4595c04a6815493a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a235cec779bb39ec8f961a935b28a2ce278c6c64"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: gpio: sch: use raw_spinlock_t in the irq startup path", "id": "2507165", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507165"}, "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-663", "details": ["A flaw was found in the Linux kernel's GPIO (General Purpose Input/Output) SCH controller. When the PREEMPT_RT (Preemptible Real-Time) feature is enabled, a locking mechanism intended for sleeping contexts is incorrectly used within a non-sleepable interrupt setup path. This can lead to a system crash, resulting in a denial of service."], "name": "CVE-2026-64428", "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": "Out of support scope", "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": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64428\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64428\nhttps://lore.kernel.org/linux-cve-announce/2026072536-CVE-2026-64428-1986@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7a81638485c1a62a87b4c391ecc9c651a4a9dc19,3b1aa05ec27eeccc889ecaa3f2d9baa9f453e50d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7a81638485c1a62a87b4c391ecc9c651a4a9dc19,4f03a15cc73c83740fc355ee22b336492d17b4da)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7a81638485c1a62a87b4c391ecc9c651a4a9dc19,7a550256d68bbdfa0903ab1c4595c04a6815493a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7a81638485c1a62a87b4c391ecc9c651a4a9dc19,a235cec779bb39ec8f961a935b28a2ce278c6c64)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7a81638485c1a62a87b4c391ecc9c651a4a9dc19,4508366ab7dd0c2917a51a9c2e23cc1b9d35157a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7a81638485c1a62a87b4c391ecc9c651a4a9dc19,41cad91a09d69e8fff4e936db29b1054b4e9f9f7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7a81638485c1a62a87b4c391ecc9c651a4a9dc19,286533cb14a3c8a8bd39ff64ea2fc8e1aa0f638b)"}}], "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": "generic", "value": "5.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.13)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "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": "2026-07-26T02:45:11.641869+00:00", "updated": "2026-09-04T22:45:04.115669+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-663"]}