CVE-2025-68359 btrfs: fix double free of qgroup record after failure to add delayed ref head

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix double free of qgroup record after failure to add delayed ref head In the previous code it was possible to incur into a double kfree scenario when calling adddelayedrefhead. This could happen if the record was reported...

CVE-2025-68359

CVE-2025-68359 concerns the Linux kernel/btrfs. The vulnerability arises from a double free of a qrecord when add_delayed_ref_head() returns an error after btrfs_qgroup_trace_extent_nolock() reports the record as existing. The fix reassigns ownership of the qrecord away from add_delayed_ref_head(...

PT-2025-52895

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The Linux kernel contains a flaw related to double freeing of a qgroup record after a failure to add a delayed reference head. Specifically, the issue arises from a double kfree scenario...

PT-2023-35043 · Linux · Linux Kernel

Name of the Vulnerable Software and Affected Versions: Linux Kernel versions prior to v6.1.8 Description: The issue concerns a qgroup record without old roots populated in btrfs, which may potentially lead to security vulnerabilities. The actual impact and attack plausibility have not yet been...