Linux Kernel Security Patches: usbmon Memory Corruption, BPF kptr Leak, and nilfs2 UAF Fixes

Critical Vulnerability Information 1. Bluetooth: Issue with hdev->workqueue - Commit: - Author: Tetsuo HOS... - Description: - Potential issue when using , particularly regarding delayed work completion for workqueues. - Fixed an incomplete issue where only chained work could be queued when the Bluetooth workqueue was drained. 2. BPF: Fix for Unreferenced kptrs - Commit: - Author: Jules Irenge - Description: - Code had an error in handling , causing unreferenced to not be cleaned during checks and field release. - Fixed by using instead of . - This bug does not cause issues unless unreferenced are freed during map release phase. 3. MTK Foe State Issue - Commit: - Author: Daniel Golli - Description: - In some cases, causes traffic overflow, especially on older systems. - Fixed by replacing it with , which works across multiple systems. 4. USB: Userspace Memory Issue - Commit: - Author: Tadeusz Struk - Description: - Userspace clients can corrupt internal memory, leading to kernel crashes, segmentation faults, access violations, etc. - In the module, userspace can map memory and overwrite it with arbitrary data, causing various issues. - Return error to prevent setting flag in , and clear to block subsequent writes. 5. nilfs2 Filesystem UAF/GFP Issue - Commit: - Author: Dongliang Mu - Description: - Use-after-free (UAF)/GFP issue in function: when fails but still calls to free uninitialized , causing a crash. - Fixed by moving before calling .

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Linux Kernel Security Patches: usbmon Memory Corruption, BPF kptr Leak, and nilfs2 UAF Fixes