CVE-2025-39836
- Source
- https://cve.org/CVERecord?id=CVE-2025-39836
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39836.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-39836
- Downstream
- Related
- Published
- 2025-09-16T13:08:52Z
- Modified
- 2026-08-12T03:51:18Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- efi: stmm: Fix incorrect buffer allocation method
- Details
-
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().
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39836.json" }- References
-
- https://git.kernel.org/stable/c/630c0e6064daf84f17aad1a7d9ca76b562e3fe47
- https://git.kernel.org/stable/c/77ff27ff0e4529a003c8a1c2492c111968c378d3
- https://git.kernel.org/stable/c/c5e81e672699e0c5557b2b755cc8f7a69aa92bff
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39836.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-39836
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git