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CVE-2023-53407: USB: gadget: pxa27x_udc: fix memory leak with using debugfs_lookup()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-18 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: USB: gadget: pxa27x_udc: fix memory leak with using debugfs_lookup() When calling debugfs_lookup() the result must have dput() called on it, otherwise the memory will leak over time. To make things simpler, just call debugfs_lookup_and_remove() instead which handles all of the logic at once.

Affected products

• Linux kernel: before 5.15.100; from 5.16 before 6.1.18; from 6.2 before 6.2.5 — fixed in 5.15.100, 6.1.18, 6.2.5

How to fix

Upgrade to a fixed version: Linux kernel 5.15.100, 6.1.18, 6.2.5. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/67c931a3f2f061bf457995fd21fff114325e0c30
• https://git.kernel.org/stable/c/7a6952fa0366d4408eb8695af1a0578c39ec718a
• https://git.kernel.org/stable/c/8da78a60f3323ce7aac589d49fb82f71a04bc835
• https://git.kernel.org/stable/c/b14d188d0d0b86e2180525aefd570dbb6ebd6aa9

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