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CVE-2026-90397— firmware: qcom: scm: Fix NULL dereference in IRQ handler before __scm is published

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，已解决以下漏洞： 固件：qcom: scm：修复在 发布之前中断处理程序中的空指针解引用问题 在 函数中， 的调用发生在 之前。存在两条路径可能在 被发布之前对其解引用，从而导致空指针解引用。 虽然中断处理程序通过其 参数接收 ，但它仅将 传递给 和 ，而这两个函数随后直接解引用 。解决方案是将 指针显式传递到这两个函数中，从而确保中断处理程序的路径完全不访问 。 在探测（probe）过程中发起的非原子 SMC 调用（例如通过 从 发起的调用）可能会返回 ，这会导致 在 发布之前运行并对其解

AI Predicted 5.5 Difficulty: Moderate EPSS 0.21% · P10

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 6bf32599223634294cdc6efb359ffaab1d68073c< b451f38cb7f5bca78484362347f039c08c94de95 affected
6bf32599223634294cdc6efb359ffaab1d68073c< 1d753df5899ec356272d08bc4718e82844e4bdf0 affected
6bf32599223634294cdc6efb359ffaab1d68073c< f312ef5026678f14caf1378c5f7fffdf667f9c81 affected
6bf32599223634294cdc6efb359ffaab1d68073c< 966d23c7e68ea32679275a7e3d2383181002c868 affected
6.3 affected
< 6.3 unaffected
6.12.110≤ 6.12.* unaffected
6.18.52≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-90397

Vulnerability Information
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Vulnerability Title
firmware: qcom: scm: Fix NULL dereference in IRQ handler before __scm is published
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: firmware: qcom: scm: Fix NULL dereference in IRQ handler before __scm is published In qcom_scm_probe(), devm_request_threaded_irq() is called before smp_store_release(&__scm, scm). Two paths can dereference __scm before it is published, both causing a NULL pointer dereference. The IRQ handler receives scm via its data argument but passes only wq_ctx to qcom_scm_waitq_wakeup() and qcom_scm_get_completion(), which then dereference __scm directly. Thread scm through both functions so the IRQ handler path never touches __scm. Non-atomic SMC calls made during probe (e.g. from qcom_tzmem_init via qcom_scm_shm_bridge_enable) can return WAITQ_SLEEP, causing qcom_scm_wait_for_wq_completion() to run before __scm is published and dereference it. Add platform_set_drvdata(pdev, scm) early in probe and change qcom_scm_wait_for_wq_completion() to take the device pointer and use dev_get_drvdata() to reach scm, removing any dependency on __scm.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 6bf32599223634294cdc6efb359ffaab1d68073c ~ b451f38cb7f5bca78484362347f039c08c94de95 -
Linux Linux 6.3 -

II. Public POCs for CVE-2026-90397

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III. Intelligence Information for CVE-2026-90397

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Patches & Fixes for CVE-2026-90397 (4)

Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total

CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90255 8.8 HIGH Bluetooth: hci_conn: fix the SCO setup context lifetime
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90371 8.8 HIGH wifi: mt76: fix RXDMAD_C buffer recycling race
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID
CVE-2026-90240 8.8 HIGH iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-90162 8.8 HIGH ksmbd: defer publishing granted locks to prevent UAF/double-free race
CVE-2026-90286 8.8 HIGH drm/amdgpu/gfx6: Use PFP on the compute queues too

Showing top 20 of 600 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

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Same vendor: Linux

V. Comments for CVE-2026-90397

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