CVE-2025-68185
Published Dec 16, 2025
Modified Apr 15, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: nfs4_setup_readdir(): insufficient locking for ->d_parent->d_inode dereferencing Theoretically it's an oopsable race, but I don't believe one can manage to hit it on real hardware; might become doable on a KVM, but it still won't be easy to attack. Anyway, it's easy to deal with - since xdr_encode_hyper() is just a call of put_unaligned_be64(), we can put that under ->d_lock and be done with that.
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References
Other References
https://git.kernel.org/stable/c/40be5b9080114f18b0cea386db415b68a7273c1a
https://git.kernel.org/stable/c/504b3fb9948a9e96ebbabdee0d33966a8bab15cb
https://git.kernel.org/stable/c/6025f641a0e30afdc5aa62017397b1860ad9f677
https://git.kernel.org/stable/c/a890a2e339b929dbd843328f9a92a1625404fe63
https://git.kernel.org/stable/c/e6cafe71eb3b5579b245ba1bd528a181e77f3df1
https://git.kernel.org/stable/c/eacfd08b26a062f1095b18719715bc82ad35312e
https://git.kernel.org/stable/c/f5e570eaab36a110c6ffda32b87c51170990c2d1
https://git.kernel.org/stable/c/fa4daf7d11e45b72aad5d943a7ab991f869fff79
Frequently Asked Questions
What is CVE-2025-68185? +
In the Linux kernel, the following vulnerability has been resolved:
nfs4_setup_readdir(): insufficient locking for ->d_parent->d_inode dereferencing
Theoretically it's an oopsable race, but I don't believe one can manage
to hit it on real hardware; might become doable on a KVM, but it still
won't be easy to attack.
Anyway, it's easy to deal with - since xdr_encode_hyper() is just a call of
put_unaligned_be64(), we can put that under ->d_lock and be done with that.
How do I check if I'm vulnerable to CVE-2025-68185? +
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.