What’s Vulnerable › Vulnerabilities

CVE-2026-90045: USB: gadget: ffs: fix mm lifetime handling

• Severity: high (CVSS 7.8 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: 2026-09-16 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: USB: gadget: ffs: fix mm lifetime handling io_data stores a pointer to the submitting task's mm_struct, but does not currently hold a reference to it while async requests are pending. This can result in a use-after-free if the task exits before completion handling finishes. Take a reference with mmgrab() when queuing the read request and release it with mmdrop() on request completion.

Affected products

• Linux: 3.15 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1625827648f4e1595ea6ba5521bc87ee5088b32b
• https://git.kernel.org/stable/c/5eb5c72c72fef76cb765ef1669b62b6a3ba1bfc8
• https://git.kernel.org/stable/c/68895e50c2250d9edd6e0a5967bf351221fd88b4
• https://git.kernel.org/stable/c/7411de0ce3b45286de1de82526795658ea6eacb0
• https://git.kernel.org/stable/c/aee2fde0f39e2b667084f4d5cc323a5c5543d733
• https://git.kernel.org/stable/c/f3d31484b3f26d63c09e5569ebfaa1079a17f171

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