{"id":"CVE-2026-90397","state":"PUBLISHED","title":"firmware: qcom: scm: Fix NULL dereference in IRQ handler before __scm is published","description":"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.","publishedAt":"2026-09-17T16:09:28.967Z","updatedAt":"2026-10-21T12:51:27.984Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6bf32599223634294cdc6efb359ffaab1d68073c","status":"affected","lessThan":"c9c1e3da0a206270e5df470ca1c82de52190d68c","versionType":"git"},{"version":"6bf32599223634294cdc6efb359ffaab1d68073c","status":"affected","lessThan":"b451f38cb7f5bca78484362347f039c08c94de95","versionType":"git"},{"version":"6bf32599223634294cdc6efb359ffaab1d68073c","status":"affected","lessThan":"1d753df5899ec356272d08bc4718e82844e4bdf0","versionType":"git"},{"version":"6bf32599223634294cdc6efb359ffaab1d68073c","status":"affected","lessThan":"f312ef5026678f14caf1378c5f7fffdf667f9c81","versionType":"git"},{"version":"6bf32599223634294cdc6efb359ffaab1d68073c","status":"affected","lessThan":"966d23c7e68ea32679275a7e3d2383181002c868","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firmware/qcom/qcom_scm-smc.c","drivers/firmware/qcom/qcom_scm.c","drivers/firmware/qcom/qcom_scm.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.3","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firmware/qcom/qcom_scm-smc.c","drivers/firmware/qcom/qcom_scm.c","drivers/firmware/qcom/qcom_scm.h"]}],"references":["https://git.kernel.org/stable/c/c9c1e3da0a206270e5df470ca1c82de52190d68c","https://git.kernel.org/stable/c/b451f38cb7f5bca78484362347f039c08c94de95","https://git.kernel.org/stable/c/1d753df5899ec356272d08bc4718e82844e4bdf0","https://git.kernel.org/stable/c/f312ef5026678f14caf1378c5f7fffdf667f9c81","https://git.kernel.org/stable/c/966d23c7e68ea32679275a7e3d2383181002c868"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90397.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90397","state":"PUBLISHED","datePublished":"2026-09-17T16:09:28.967Z","dateUpdated":"2026-10-21T12:51:27.984Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.811Z"},"containers":{"cna":{"title":"firmware: qcom: scm: Fix NULL dereference in IRQ handler before __scm is published","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6bf32599223634294cdc6efb359ffaab1d68073c","status":"affected","lessThan":"c9c1e3da0a206270e5df470ca1c82de52190d68c","versionType":"git"},{"version":"6bf32599223634294cdc6efb359ffaab1d68073c","status":"affected","lessThan":"b451f38cb7f5bca78484362347f039c08c94de95","versionType":"git"},{"version":"6bf32599223634294cdc6efb359ffaab1d68073c","status":"affected","lessThan":"1d753df5899ec356272d08bc4718e82844e4bdf0","versionType":"git"},{"version":"6bf32599223634294cdc6efb359ffaab1d68073c","status":"affected","lessThan":"f312ef5026678f14caf1378c5f7fffdf667f9c81","versionType":"git"},{"version":"6bf32599223634294cdc6efb359ffaab1d68073c","status":"affected","lessThan":"966d23c7e68ea32679275a7e3d2383181002c868","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firmware/qcom/qcom_scm-smc.c","drivers/firmware/qcom/qcom_scm.c","drivers/firmware/qcom/qcom_scm.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.3","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firmware/qcom/qcom_scm-smc.c","drivers/firmware/qcom/qcom_scm.c","drivers/firmware/qcom/qcom_scm.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/c9c1e3da0a206270e5df470ca1c82de52190d68c"},{"url":"https://git.kernel.org/stable/c/b451f38cb7f5bca78484362347f039c08c94de95"},{"url":"https://git.kernel.org/stable/c/1d753df5899ec356272d08bc4718e82844e4bdf0"},{"url":"https://git.kernel.org/stable/c/f312ef5026678f14caf1378c5f7fffdf667f9c81"},{"url":"https://git.kernel.org/stable/c/966d23c7e68ea32679275a7e3d2383181002c868"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-21T12:51:27.984Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}