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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.

PUBLISHED Reserved 2025-04-16 | Published 2025-10-28 | Updated 2025-10-28 | Assigner Linux

Product status

Default status
unaffected

7bdee41575919773818e525ea19e54eb817770af (git) before 9338093db954918558677a468d32e77041c65167
affected

7bdee41575919773818e525ea19e54eb817770af (git) before 6a7874ab814ce12003c46a92f7afc9b035c8e8e9
affected

7bdee41575919773818e525ea19e54eb817770af (git) before d5cf5b37064b1699d946e8b7ab4ac7d7d101814c
affected

Default status
affected

6.8
affected

Any version before 6.8
unaffected

6.12.53 (semver)
unaffected

6.17.3 (semver)
unaffected

6.18-rc1 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/9338093db954918558677a468d32e77041c65167

git.kernel.org/...c/6a7874ab814ce12003c46a92f7afc9b035c8e8e9

git.kernel.org/...c/d5cf5b37064b1699d946e8b7ab4ac7d7d101814c

cve.org (CVE-2025-40031)

nvd.nist.gov (CVE-2025-40031)

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