Btrfs File System Heap Buffer Overflow DoS

The vulnerability in the lookupextentdataref function within the fs/btrfs/extent-tree.c file of the Btrfs filesystem in the Linux kernel allows an attacker to manipulate the confidentiality, integrity, and availability of protected information...

CVE-2026-31666 btrfs: fix incorrect return value after changing leaf in lookup_extent_data_ref()

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix incorrect return value after changing leaf in lookupextentdataref After commit 1618aa3c2e01 "btrfs: simplify return variables in lookupextentdataref", the err and ret variables were merged into a single ret variable...

CVE-2026-31666: Improper Check for Unusual or Exceptional Conditions

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix incorrect return value after changing leaf in lookupextentdataref After commit 1618aa3c2e01 "btrfs: simplify return variables in lookupextentdataref", the err and ret variables were merged into a single ret variable...