CVE-2026-45961

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

gfs2: fix memory leaks in gfs2_fill_super error path

Fix two memory leaks in the gfs2_fill_super() error handling path when

transitioning a filesystem to read-write mode fails.

First leak: kthread objects (thread_struct, task_struct, etc.)

When gfs2_freeze_lock_shared() fails after init_threads() succeeds, the

created kernel threads (logd and quotad) are never destroyed. This

occurs because the fail_per_node label doesn't call

gfs2_destroy_threads().

Second leak: quota bitmap buffer (8192 bytes)

When gfs2_make_fs_rw() fails after gfs2_quota_init() succeeds but

before other operations complete, the allocated quota bitmap is never

freed.

The fix moves thread cleanup to the fail_per_node label to handle all

error paths uniformly. gfs2_destroy_threads() is safe to call

unconditionally as it checks for NULL pointers. Quota cleanup is added

in gfs2_make_fs_rw() to properly handle the withdrawal case where

quota initiali

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References