CVE-2025-40036
Published Oct 28, 2025
Modified Apr 15, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: fix possible map leak in fastrpc_put_args copy_to_user() failure would cause an early return without cleaning up the fdlist, which has been updated by the DSP. This could lead to map leak. Fix this by redirecting to a cleanup path on failure, ensuring that all mapped buffers are properly released before returning.
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References
Other References
https://git.kernel.org/stable/c/3ad42dc66445df6977cf4be0c06f1a655299ce6c
https://git.kernel.org/stable/c/78d33a041555db03903e8037fd053ed74fbd88cb
https://git.kernel.org/stable/c/a085658264d0c8d4f795d4631f77d7289a021de9
https://git.kernel.org/stable/c/c000f65f0ac93d9f9cc69a230d372f6ca93e4879
https://git.kernel.org/stable/c/da1ba64176e0138f2bfa96f9e43e8c3640d01e1e
Frequently Asked Questions
What is CVE-2025-40036? +
In the Linux kernel, the following vulnerability has been resolved:
misc: fastrpc: fix possible map leak in fastrpc_put_args
copy_to_user() failure would cause an early return without cleaning up
the fdlist, which has been updated by the DSP. This could lead to map
leak. Fix this by redirecting to a cleanup path on failure, ensuring
that all mapped buffers are properly released before returning.
How do I check if I'm vulnerable to CVE-2025-40036? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.