The Linux kernel vulnerability CVE-2026-72357 concerns improper use of the mm_struct in the __in_uprobe_trampoline function within the uprobes/x86 subsystem. Specifically, during the unregister path, the code incorrectly used current->mm for VMA lookup while operating in the tracer context rather than the traced process context. This mismatch could lead to incorrect memory area lookups. The patch corrected this by adding an explicit mm_struct pointer argument to __in_uprobe_trampoline and modifying related callers to provide the proper mm_struct pointer, ensuring accurate context handling.

The vulnerability could cause incorrect memory area lookups during the unregister process in uprobes, potentially leading to unexpected behavior or instability in kernel tracing operations. No known exploits in the wild have been reported. The impact is limited to the kernel's uprobes tracing mechanism and does not indicate broader system compromise or privilege escalation based on the provided data.

A fix for this vulnerability has been implemented in the Linux kernel by modifying the __in_uprobe_trampoline function and its callers to use the correct mm_struct pointer. Users should apply the official kernel updates that include this patch once available. Patch status is not yet confirmed in the provided data; check the vendor or Linux kernel advisories for the current remediation guidance.