CVE-2012-5375: The CRC32C feature in the Btrfs implementation in the Linux kernel before 3.8-rc1 allows local users to cau...

Security readout for executives and security teams

This is a local denial-of-service issue in Linux Btrfs before 3.8-rc1. A local user with write access to a directory important to another user could create a specially named file that prevents file creation in that directory. It affects availability, not confidentiality or remote access. Exposure is limited to Linux systems using affected Btrfs kernels before the fixed upstream change, especially multi-user systems or workloads where less-trusted local users can write into shared or operationally important directories. Treat as moderate priority where Btrfs is used on shared Linux systems. It can disrupt file creation but requires local write access and has no cited active exploitation. Patch through normal kernel maintenance, faster for multi-user or production systems using Btrfs. Mitigation focus: Check Linux vendor advisories for fixed kernel packages.; Update affected kernels to vendor-fixed releases or builds containing the upstream fix.; Prioritize systems using Btrfs for shared or multi-user writable directories..

Prepared

Jun 24, 2026, 11:46 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.