{"id":"CVE-2026-90397","summary":"firmware: qcom: scm: Fix NULL dereference in IRQ handler before __scm is published","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: qcom: scm: Fix NULL dereference in IRQ handler before __scm is published\n\nIn qcom_scm_probe(), devm_request_threaded_irq() is called before\nsmp_store_release(&__scm, scm). Two paths can dereference __scm before\nit is published, both causing a NULL pointer dereference.\n\nThe IRQ handler receives scm via its data argument but passes only wq_ctx\nto qcom_scm_waitq_wakeup() and qcom_scm_get_completion(), which then\ndereference __scm directly. Thread scm through both functions so the IRQ\nhandler path never touches __scm.\n\nNon-atomic SMC calls made during probe (e.g. from qcom_tzmem_init via\nqcom_scm_shm_bridge_enable) can return WAITQ_SLEEP, causing\nqcom_scm_wait_for_wq_completion() to run before __scm is published and\ndereference it. Add platform_set_drvdata(pdev, scm) early in probe and\nchange qcom_scm_wait_for_wq_completion() to take the device pointer and\nuse dev_get_drvdata() to reach scm, removing any dependency on __scm.","modified":"2026-09-19T03:47:29.024787841Z","published":"2026-09-17T16:09:28.967Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90397.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1d753df5899ec356272d08bc4718e82844e4bdf0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/966d23c7e68ea32679275a7e3d2383181002c868"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b451f38cb7f5bca78484362347f039c08c94de95"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f312ef5026678f14caf1378c5f7fffdf667f9c81"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90397.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90397"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6bf32599223634294cdc6efb359ffaab1d68073c"},{"fixed":"b451f38cb7f5bca78484362347f039c08c94de95"},{"fixed":"1d753df5899ec356272d08bc4718e82844e4bdf0"},{"fixed":"f312ef5026678f14caf1378c5f7fffdf667f9c81"},{"fixed":"966d23c7e68ea32679275a7e3d2383181002c868"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90397.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.3.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90397.json"}}],"schema_version":"1.9.0"}