Memory Leak in Btrfs within Linux Kernel

CVE-2026-74722

What is CVE-2026-74722?

A memory leak vulnerability has been identified in the Btrfs file system implementation within the Linux kernel. Local fuzzing tests revealed unreferenced objects being retained in memory due to inadequate cleanup in the 'btrfs_do_encoded_write()' function. This issue arises particularly during the allocation phases, leading to potential exhaustion of memory resources if repeatedly triggered in a harmful manner. The vulnerability has been addressed by implementing appropriate memory management practices, ensuring that allocated changesets are properly freed prior to function exit.

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