What’s Vulnerable › Vulnerabilities

CVE-2023-53207: ublk: fail to recover device if queue setup is interrupted

• 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: 2025-09-15 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: ublk: fail to recover device if queue setup is interrupted In ublk_ctrl_end_recovery(), if wait_for_completion_interruptible() is interrupted by signal, queues aren't setup successfully yet, so we have to fail UBLK_CMD_END_USER_RECOVERY, otherwise kernel oops can be triggered.

Affected products

• Linux kernel: from 6.1 before 6.1.43; from 6.2 before 6.4.8; 6.5-rc1, 6.5-rc2, 6.5-rc3 — fixed in 6.1.43, 6.4.8

How to fix

Upgrade to a fixed version: Linux kernel 6.1.43, 6.4.8. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0c0cbd4ebc375ceebc75c89df04b74f215fab23a
• https://git.kernel.org/stable/c/84415f934ad4e96f3507fd09b831953d60fb04ec
• https://git.kernel.org/stable/c/b3a1e243a74632f88b22e713f1c7256754017d58

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