{"cve":"CVE-2024-26806","nvd":{"published":"2024-04-04T09:15:09.333","modified":"2026-06-17T07:18:23.847","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nspi: cadence-qspi: remove system-wide suspend helper calls from runtime PM hooks\n\nThe ->runtime_suspend() and ->runtime_resume() callbacks are not\nexpected to call spi_controller_suspend() and spi_controller_resume().\nRemove calls to those in the cadence-qspi driver.\n\nThose helpers have two roles currently:\n - They stop/start the queue, including dealing with the kworker.\n - They toggle the SPI controller SPI_CONTROLLER_SUSPENDED flag. It\n   requires acquiring ctlr->bus_lock_mutex.\n\nStep one is irrelevant because cadence-qspi is not queued. Step two\nhowever has two implications:\n - A deadlock occurs, because ->runtime_resume() is called in a context\n   where the lock is already taken (in the ->exec_op() callback, where\n   the usage count is incremented).\n - It would disallow all operations once the device is auto-suspended.\n\nHere is a brief call tree highlighting the mutex deadlock:\n\nspi_mem_exec_op()\n        ...\n        spi_mem_access_start()\n                mutex_lock(&ctlr->bus_lock_mutex)\n\n        cqspi_exec_mem_op()\n                pm_runtime_resume_and_get()\n                        cqspi_resume()\n                                spi_controller_resume()\n                                        mutex_lock(&ctlr->bus_lock_mutex)\n                ...\n\n        spi_mem_access_end()\n                mutex_unlock(&ctlr->bus_lock_mutex)\n        ...","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-667"],"references":["https://git.kernel.org/stable/c/041562ebc4759c9932b59a06527f8753b86da365","https://git.kernel.org/stable/c/959043afe53ae80633e810416cee6076da6e91c6","https://git.kernel.org/stable/c/041562ebc4759c9932b59a06527f8753b86da365","https://git.kernel.org/stable/c/959043afe53ae80633e810416cee6076da6e91c6"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:48:32.179249784+00:00"},"epss":{"cve":"CVE-2024-26806","score":0.00149,"percentile":0.04037,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}