{"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": "2026-07-25T08:51:05.460Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T08:51:05.460Z"}, "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-rc1", "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-rc1"}]}]}], "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"}}}}

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