What’s Vulnerable › Vulnerabilities

CVE-2025-40062: crypto: hisilicon/qm - set NULL to qm->debug.qm_diff_regs

• Severity: unknown
• 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: 2025-10-28 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: hisilicon/qm - set NULL to qm->debug.qm_diff_regs When the initialization of qm->debug.acc_diff_reg fails, the probe process does not exit. However, after qm->debug.qm_diff_regs is freed, it is not set to NULL. This can lead to a double free when the remove process attempts to free it again. Therefore, qm->debug.qm_diff_regs should be set to NULL after it is freed.

Affected products

• Linux kernel: from 6.1.98 before 6.1.156; from 6.6.39 before 6.6.112; from 6.9.9 before 6.10; 6.10 — fixed in 6.1.156, 6.10, 6.18, 6.6.112

How to fix

Upgrade to a fixed version: Linux kernel 6.1.156, 6.10, 6.18, 6.6.112. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1750f1ec143ebabdbdfa013668665c9d5042c430
• https://git.kernel.org/stable/c/7226a0650ad5705bd8d39a11be270fa21ed1e6a5
• https://git.kernel.org/stable/c/a7836260d5121949ba734e840d42a86ab4a32fcc
• https://git.kernel.org/stable/c/a87a21a56244b8f4eb357f6bad879247005bbe38
• https://git.kernel.org/stable/c/f0cafb02de883b3b413d34eb079c9680782a9cc1

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