CVE-2026-90433
In the Linux kernel, the following vulnerability has been resolved:
spi: oc-tiny: switch to managed controller allocation
The controller is allocated with the non-managed spi_alloc_host() while the interrupt is registered with devm_request_irq(). During removal, spi_bitbang_stop() only unregisters the controller; the subsequent spi_controller_put() then frees the controller together with its embedded driver-private devdata, which is the IRQ handler's dev_id. The devm_request_irq() release action (free_irq()), which drains the handler, does not run until after .remove() returns. A late or latched interrupt can therefore reach tiny_spi_irq() and dereference already-freed memory (e.g. hw->base).
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Switch to devm_spi_alloc_host() so that the devres LIFO order releases the controller only after free_irq() has drained the handler, and drop the now-redundant spi_controller_put() from .remove(). The probe error path is simplified to direct returns.
This issue was found by an in-house static analysis tool.
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
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{
"id": "CVE-2026-90433",
"cveTags": [],
"metrics": {},
"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": "ce792580ea2ce6f7259b45124e9ccc4574c31606",
"lessThan": "0260c94453a08491640e61f8cf0c384edbe7bd11",
"versionType": "git"
},
{
"status": "affected",
"version": "ce792580ea2ce6f7259b45124e9ccc4574c31606",
"lessThan": "ef5cc4a8c088d05549f71950a72b5deff5000fd7",
"versionType": "git"
},
{
"status": "affected",
"version": "ce792580ea2ce6f7259b45124e9ccc4574c31606",
"lessThan": "1cd16c8d68f58e54abb8f331d05469237200631f",
"versionType": "git"
},
{
"status": "affected",
"version": "ce792580ea2ce6f7259b45124e9ccc4574c31606",
"lessThan": "d710f43ce30975d197f73c543bfe47b958d8ba17",
"versionType": "git"
}
],
"programFiles": [
"drivers/spi/spi-oc-tiny.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.39"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.39",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3-rc1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/spi/spi-oc-tiny.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-09-17T17:17:48.400",
"references": [
{
"url": "https://git.kernel.org/stable/c/0260c94453a08491640e61f8cf0c384edbe7bd11",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/1cd16c8d68f58e54abb8f331d05469237200631f",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d710f43ce30975d197f73c543bfe47b958d8ba17",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ef5cc4a8c088d05549f71950a72b5deff5000fd7",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: oc-tiny: switch to managed controller allocation\n\nThe controller is allocated with the non-managed spi_alloc_host() while\nthe interrupt is registered with devm_request_irq(). During removal,\nspi_bitbang_stop() only unregisters the controller; the subsequent\nspi_controller_put() then frees the controller together with its\nembedded driver-private devdata, which is the IRQ handler's dev_id. The\ndevm_request_irq() release action (free_irq()), which drains the\nhandler, does not run until after .remove() returns. A late or latched\ninterrupt can therefore reach tiny_spi_irq() and dereference\nalready-freed memory (e.g. hw->base).\n\nSwitch to devm_spi_alloc_host() so that the devres LIFO order releases\nthe controller only after free_irq() has drained the handler, and drop\nthe now-redundant spi_controller_put() from .remove(). The probe error\npath is simplified to direct returns.\n\nThis issue was found by an in-house static analysis tool."
}
],
"lastModified": "2026-09-17T17:17:48.400",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}