FKIE_CVE-2026-43415

Vulnerability from fkie_nvd - Published: 2026-05-08 15:16 - Updated: 2026-05-21 18:08
Severity
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Fix SError in ufshcd_rtc_work() during UFS suspend In __ufshcd_wl_suspend(), cancel_delayed_work_sync() is called to cancel the UFS RTC work, but it is placed after ufshcd_vops_suspend(hba, pm_op, POST_CHANGE). This creates a race condition where ufshcd_rtc_work() can still be running while ufshcd_vops_suspend() is executing. When UFSHCD_CAP_CLK_GATING is not supported, the condition !hba->clk_gating.active_reqs is always true, causing ufshcd_update_rtc() to be executed. Since ufshcd_vops_suspend() typically performs clock gating operations, executing ufshcd_update_rtc() at that moment triggers an SError. The kernel panic trace is as follows: Kernel panic - not syncing: Asynchronous SError Interrupt Call trace: dump_backtrace+0xec/0x128 show_stack+0x18/0x28 dump_stack_lvl+0x40/0xa0 dump_stack+0x18/0x24 panic+0x148/0x374 nmi_panic+0x3c/0x8c arm64_serror_panic+0x64/0x8c do_serror+0xc4/0xc8 el1h_64_error_handler+0x34/0x4c el1h_64_error+0x68/0x6c el1_interrupt+0x20/0x58 el1h_64_irq_handler+0x18/0x24 el1h_64_irq+0x68/0x6c ktime_get+0xc4/0x12c ufshcd_mcq_sq_stop+0x4c/0xec ufshcd_mcq_sq_cleanup+0x64/0x1dc ufshcd_clear_cmd+0x38/0x134 ufshcd_issue_dev_cmd+0x298/0x4d0 ufshcd_exec_dev_cmd+0x1a4/0x1c4 ufshcd_query_attr+0xbc/0x19c ufshcd_rtc_work+0x10c/0x1c8 process_scheduled_works+0x1c4/0x45c worker_thread+0x32c/0x3e8 kthread+0x120/0x1d8 ret_from_fork+0x10/0x20 Fix this by moving cancel_delayed_work_sync() before the call to ufshcd_vops_suspend(hba, pm_op, PRE_CHANGE), ensuring the UFS RTC work is fully completed or cancelled at that point.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2fcc2fc21cae7a0cbe73053f7fc70680ce2a7f69Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a6a894413b043704b77a6294c379c93b1477e48dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b0bd84c39289ef6a6c3827dd52c875659291970aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b17211b512cbf0e07de27e1932428ee6c20df910Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c387a8f1d3713f6b0415ece8485042d0f134b91aPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ufs: core: Fix SError in ufshcd_rtc_work() during UFS suspend\n\nIn __ufshcd_wl_suspend(), cancel_delayed_work_sync() is called to cancel\nthe UFS RTC work, but it is placed after ufshcd_vops_suspend(hba, pm_op,\nPOST_CHANGE). This creates a race condition where ufshcd_rtc_work() can\nstill be running while ufshcd_vops_suspend() is executing. When\nUFSHCD_CAP_CLK_GATING is not supported, the condition\n!hba-\u003eclk_gating.active_reqs is always true, causing ufshcd_update_rtc()\nto be executed. Since ufshcd_vops_suspend() typically performs clock\ngating operations, executing ufshcd_update_rtc() at that moment triggers\nan SError. The kernel panic trace is as follows:\n\nKernel panic - not syncing: Asynchronous SError Interrupt\nCall trace:\n dump_backtrace+0xec/0x128\n show_stack+0x18/0x28\n dump_stack_lvl+0x40/0xa0\n dump_stack+0x18/0x24\n panic+0x148/0x374\n nmi_panic+0x3c/0x8c\n arm64_serror_panic+0x64/0x8c\n do_serror+0xc4/0xc8\n el1h_64_error_handler+0x34/0x4c\n el1h_64_error+0x68/0x6c\n el1_interrupt+0x20/0x58\n el1h_64_irq_handler+0x18/0x24\n el1h_64_irq+0x68/0x6c\n ktime_get+0xc4/0x12c\n ufshcd_mcq_sq_stop+0x4c/0xec\n ufshcd_mcq_sq_cleanup+0x64/0x1dc\n ufshcd_clear_cmd+0x38/0x134\n ufshcd_issue_dev_cmd+0x298/0x4d0\n ufshcd_exec_dev_cmd+0x1a4/0x1c4\n ufshcd_query_attr+0xbc/0x19c\n ufshcd_rtc_work+0x10c/0x1c8\n process_scheduled_works+0x1c4/0x45c\n worker_thread+0x32c/0x3e8\n kthread+0x120/0x1d8\n ret_from_fork+0x10/0x20\n\nFix this by moving cancel_delayed_work_sync() before the call to\nufshcd_vops_suspend(hba, pm_op, PRE_CHANGE), ensuring the UFS RTC work is\nfully completed or cancelled at that point."
    }
  ],
  "id": "CVE-2026-43415",
  "lastModified": "2026-05-21T18:08:58.593",
  "metrics": {
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          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "exploitabilityScore": 1.0,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2026-05-08T15:16:53.477",
  "references": [
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      "source": "nvd@nist.gov",
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}


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