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CVE-2021-47188: scsi: ufs: core: Improve SCSI abort handling

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-04-10 · updated 2026-08-04

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Improve SCSI abort handling The following has been observed on a test setup: WARNING: CPU: 4 PID: 250 at drivers/scsi/ufs/ufshcd.c:2737 ufshcd_queuecommand+0x468/0x65c Call trace: ufshcd_queuecommand+0x468/0x65c scsi_send_eh_cmnd+0x224/0x6a0 scsi_eh_test_devices+0x248/0x418 scsi_eh_ready_devs+0xc34/0xe58 scsi_error_handler+0x204/0x80c kthread+0x150/0x1b4 ret_from_fork+0x10/0x30 That warning is triggered by the following statement: WARN_ON(lrbp->cmd); Fix this warning by clearing lrbp->cmd from the abort handler.

Affected products

• Linux kernel: from 3.4 before 5.15.5; 5.16-rc1 — fixed in 5.15.5

How to fix

Upgrade to a fixed version: Linux kernel 5.15.5. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3ff1f6b6ba6f97f50862aa50e79959cc8ddc2566
• https://git.kernel.org/stable/c/9491bc16082d9a402c9099acbfffc89af6f9316f
• https://git.kernel.org/stable/c/c36baca06efa833adaefba61f45fefdc49b6d070
• https://git.kernel.org/stable/c/3ff1f6b6ba6f97f50862aa50e79959cc8ddc2566
• https://git.kernel.org/stable/c/c36baca06efa833adaefba61f45fefdc49b6d070

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