What is CVE-2025-40315?

CVE-2025-40315 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 5.4.180 onward and patched in 5.4.302, 5.10.247, 5.15.197 and others. CVE-2025-40315 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-40315?

CVE-2025-40315 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2025-40315?

Yes, CVE-2025-40315 has been patched. Fixed versions include 5.4.302, 5.10.247, 5.15.197 and others. If you are running Linux kernel 5.4.180 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-40315 actively exploited?

CVE-2025-40315 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-40315

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: Fix epfile null pointer access after ep enable. A race condition occurs when ffs_func_eps_enable() runs concurrently with ffs_data_reset(). The ffs_data_clear() called in ffs_data_reset() sets ffs->epfiles to NULL before resetting ffs->eps_count to 0, leading to a NULL pointer dereference when accessing epfile->ep in ffs_func_eps_enable() after successful usb_ep_enable(). The ffs->epfiles pointer is set to NULL in both ffs_data_clear() and ffs_data_close() functions, and its modification is protected by the spinlock ffs->eps_lock. And the whole ffs_func_eps_enable() function is also protected by ffs->eps_lock. Thus, add NULL pointer handling for ffs->epfiles in the ffs_func_eps_enable() function to fix issues

Package Linux Kernel

Published 2025-12-08

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 5.4.180, 5.10.101, 5.15.24, 4.14.267, 4.19.230, 5.16.10, 5.17 and later are affected. Fixed in 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.58, 6.17.8, 6.18 and their respective stable series.

Affected from

≥ 5.4.180 ≥ 5.10.101 ≥ 5.15.24 ≥ 4.14.267 ≥ 4.19.230 ≥ 5.16.10 ≥ 5.17

Fixed in

✓ 5.4.302 5.4.x ✓ 5.10.247 5.10.x ✓ 5.15.197 5.15.x ✓ 6.1.159 6.1.x ✓ 6.6.117 6.6.x ✓ 6.12.58 6.12.x ✓ 6.17.8 6.17.x ✓ 6.18

References

The following references provide additional information about CVE-2025-40315 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/1c0dbd240be3f87cac321b14e17979b7e9cb6a8f
Patch
Kernel patch commit
https://git.kernel.org/stable/c/30880e9df27332403dd638a82c27921134b3630b
Patch
Kernel patch commit
https://git.kernel.org/stable/c/9ec40fba7357df2d36f4c2e2f3b9b1a4fba0a272
Patch

8 patch commits total View all on NVD

Frequently asked questions

What is CVE-2025-40315?

CVE-2025-40315 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.4.180 onward and has been patched in 5.4.302, 5.10.247, 5.15.197 and others. CVE-2025-40315 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2025-40315?

Yes — CVE-2025-40315 has been patched. Fixed versions include 5.4.302, 5.10.247, 5.15.197 and others. If you are running Linux kernel 5.4.180 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-40315 actively exploited?

No — CVE-2025-40315 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.