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CVE-2026-93211

Unknown

Last modified

CVE-2026-93211 is a vulnerability of currently unknown severity. 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..

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 8eea99a81c6f67c08fedd7db2ccd09aa93db69a7, < f060f43a67635dbb393bf5dcbfc3e8b9a44942cb; >= 8eea99a81c6f67c08fedd7db2ccd09aa93db69a7, < b57bd8cb739cb3cf88bdb1a5903a42a707a5c282; >= 8eea99a81c6f67c08fedd7db2ccd09aa93db69a7, < 431c70ca5163c98c746f22f16cd58ca5aefec6dc; >= 8eea99a81c6f67c08fedd7db2ccd09aa93db69a7, < b0c58934f5cc4f05b63ef6605dd10c1d0d489e88
LinuxLinux6.7

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-93211?
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.
How severe is CVE-2026-93211?
Severity scoring for CVE-2026-93211 is pending analysis.
How do I fix CVE-2026-93211?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST