Bug 2468183 (CVE-2026-43415) - CVE-2026-43415 kernel: scsi: ufs: core: Fix SError in ufshcd_rtc_work() during UFS suspend
Summary: CVE-2026-43415 kernel: scsi: ufs: core: Fix SError in ufshcd_rtc_work() durin...
Keywords:
Status: NEW
Alias: CVE-2026-43415
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-08 15:03 UTC by OSIDB Bzimport
Modified: 2026-05-08 22:52 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:


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Description OSIDB Bzimport 2026-05-08 15:03:30 UTC
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.


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