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CVE-2026-90045

USB: gadget: ffs: fix mm lifetime handling

HIGH
7.8
CVSS Score
Published: September 16, 2026 at 10:33 AM UTC
Updated: October 21, 2026 at 01:20 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
2e4c7553cd6f9c68bb741582dcb614edcbeca70f3.15
Vendor states this is fixed in 1625827648f4e1595ea6ba5521bc87ee5088b32b (fixed)
Vendor states this is fixed in 5eb5c72c72fef76cb765ef1669b62b6a3ba1bfc8 (fixed)
Vendor states this is fixed in 7411de0ce3b45286de1de82526795658ea6eacb0 (fixed)
Vendor states this is fixed in f3d31484b3f26d63c09e5569ebfaa1079a17f171 (fixed)
Vendor states this is fixed in 3.15 (unaffected)
Vendor states this is fixed in 6.12.111 (unaffected)
Vendor states this is fixed in 6.18.51 (unaffected)
Vendor states this is fixed in 6.6.160 (unaffected)
Vendor states this is fixed in 7.2.5 (unaffected)
Vendor states this is fixed in 7.3 (unaffected)
Vendor states this is fixed in 7.3-rc1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

Source: cverecord
https://git.kernel.org/stable/c/f3d31484b3f26d63c09e5569ebfaa1079a17f171
Source: cverecord
https://git.kernel.org/stable/c/7411de0ce3b45286de1de82526795658ea6eacb0
Source: cverecord
https://git.kernel.org/stable/c/5eb5c72c72fef76cb765ef1669b62b6a3ba1bfc8
Source: cverecord
https://git.kernel.org/stable/c/1625827648f4e1595ea6ba5521bc87ee5088b32b
Source: cverecord
https://git.kernel.org/stable/c/aee2fde0f39e2b667084f4d5cc323a5c5543d733

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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