Vulnerability Description
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.
References
- https://git.kernel.org/stable/c/6a7874ab814ce12003c46a92f7afc9b035c8e8e9
- https://git.kernel.org/stable/c/9338093db954918558677a468d32e77041c65167
- https://git.kernel.org/stable/c/d5cf5b37064b1699d946e8b7ab4ac7d7d101814c
FAQ
What is CVE-2025-40031?
CVE-2025-40031 is a documented vulnerability. 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 ca...
How severe is CVE-2025-40031?
CVSS scoring is not yet available for CVE-2025-40031. Check NVD for updates.
Is there a patch for CVE-2025-40031?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.