CVE-2025-39836 (GCVE-0-2025-39836)
Vulnerability from cvelistv5
Published
2025-09-16 13:08
Modified
2025-09-16 13:08
Severity ?
Summary
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().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/630c0e6064daf84f17aad1a7d9ca76b562e3fe47
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/77ff27ff0e4529a003c8a1c2492c111968c378d3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c5e81e672699e0c5557b2b755cc8f7a69aa92bff
Impacted products
Vendor Product Version
Linux Linux Version: c44b6be62e8dd4ee0a308c36a70620613e6fc55f
Version: c44b6be62e8dd4ee0a308c36a70620613e6fc55f
Version: c44b6be62e8dd4ee0a308c36a70620613e6fc55f
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   Linux Linux Version: 6.8
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            "drivers/firmware/efi/stmm/tee_stmm_efi.c"
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      "providerMetadata": {
        "dateUpdated": "2025-09-16T13:08:52.326Z",
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    "dateReserved": "2025-04-16T07:20:57.141Z",
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}


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