CVE-2025-40031
In the Linux kernel, the following vulnerability has been resolved: tee: fix register_shm_helper() In register_shm_helper(), fix incorrect error handling for a call to iov_iter_extract_pages(). A case is missing for when iov_iter_extract_pages() only got some pages and return a number larger than 0, but not the requested amount. This fixes a possible NULL pointer dereference following a bad input from ioctl(TEE_IOC_SHM_REGISTER) where parts of the buffer isn't mapped.
Affected versions
Linux kernel versions
6.8
and later are affected. Fixed in
6.12.53,
6.17.3,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-40031 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
-
PatchKernel patch commithttps://git.kernel.org/stable/c/6a7874ab814ce12003c46a92f7afc9b035c8e8e9
-
PatchKernel patch commithttps://git.kernel.org/stable/c/9338093db954918558677a468d32e77041c65167
-
PatchKernel patch commithttps://git.kernel.org/stable/c/d5cf5b37064b1699d946e8b7ab4ac7d7d101814c
Frequently asked questions
-
What is CVE-2025-40031?
CVE-2025-40031 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.8 onward and has been patched in 6.12.53, 6.17.3 and 6.18. CVE-2025-40031 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
-
Is there a patch available for CVE-2025-40031?
Yes — CVE-2025-40031 has been patched. Fixed versions include 6.12.53, 6.17.3 and 6.18. If you are running Linux kernel 6.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
-
Is CVE-2025-40031 actively exploited?
No — CVE-2025-40031 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.