Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nfsd: initialize DRC hash table before registering shrinker shrinker_register() precedes the INIT_LIST_HEAD loop and the drc_hashsize store. On weakly-ordered architectures (arm64, ppc), a shrinker scan can observe drc_hashsize before the bucket list heads are initialized, causing a NULL deref in the DRC shrinker callback. Move bucket initialization and the drc_hashsize store before shrinker_register() so the hash table is fully initialized before it becomes visible to the shrinker.
References
- https://git.kernel.org/stable/c/431c70ca5163c98c746f22f16cd58ca5aefec6dc
- https://git.kernel.org/stable/c/b0c58934f5cc4f05b63ef6605dd10c1d0d489e88
- https://git.kernel.org/stable/c/b57bd8cb739cb3cf88bdb1a5903a42a707a5c282
- https://git.kernel.org/stable/c/f060f43a67635dbb393bf5dcbfc3e8b9a44942cb
FAQ
What is CVE-2026-93211?
CVE-2026-93211 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: nfsd: initialize DRC hash table before registering shrinker shrinker_register() precedes the INIT_LIST_HEAD loop and the drc_hashs...
How severe is CVE-2026-93211?
CVSS scoring is not yet available for CVE-2026-93211. Check NVD for updates.
Is there a patch for CVE-2026-93211?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.