CVE-2025-39836
efi: stmm: Fix incorrect buffer allocation method
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: efi: stmm: Fix incorrect buffer allocation method The communication buffer allocated by setup_mm_hdr() is later on passed to tee_shm_register_kernel_buf(). The latter expects those buffers to be contiguous pages, but setup_mm_hdr() just uses kmalloc(). That can cause various corruptions or BUGs, specifically since commit 9aec2fb0fd5e ("slab: allocate frozen pages"), though it was broken before as well. Fix this by using alloc_pages_exact() instead of kmalloc().
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 16, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
c44b6be62e8dd4ee0a308c36a70620613e6fc55f < 77ff27ff0e4529a003c8a1c2492c111968c378d3 c44b6be62e8dd4ee0a308c36a70620613e6fc55f < 630c0e6064daf84f17aad1a7d9ca76b562e3fe47 c44b6be62e8dd4ee0a308c36a70620613e6fc55f < c5e81e672699e0c5557b2b755cc8f7a69aa92bff
Linux / Linux
6.8