CVE-2026-68415

In the Linux kernel, the following vulnerability has been resolved: xfrm: clear mode callbacks after failed mode setup xfrm_state_gc_task can run long after a failed IPTFS state setup. In the reproduced case, __xfrm_init_state() cached x->mode_cbs, IPTFS setup returned -ENOMEM before publishing mode_data, and the temporary module reference from xfrm_get_mode_cbs() was dropped immediately. The dead state then kept x->mode_cbs until deferred GC ran after xfrm_iptfs had been unloaded. Clear x->mode_cbs when mode init or clone fails before publishing mode_data. Those states never installed mode-specific state or the long-term IPTFS module pin, so deferred GC has nothing mode-specific to destroy and must not retain a callback table pointer past the temporary lookup reference. The buggy scenario involves two paths, with each column showing the order within that path: failed setup path: 1. cache x->mode_cbs 2. mode setup fails before mode_data 3. drop the temporary module ref 4. dead state keeps x->mode_cbs cached GC/unload path: 1. xfrm_state_put() queues GC work 2. xfrm_iptfs unloads later 3. xfrm_state_gc_task runs 4. GC dereferences stale x->mode_cbs This also covers the failed clone path where clone_state() returns before publishing mode_data. Validation reproduced this kernel report: Kernel panic - not syncing: Fatal exception CONFIG_FAULT_INJECTION_STACKTRACE_FILTER=y failslab_stacktrace_filter matched xfrm_iptfs frames ack_error=-12 FAULT_INJECTION: forcing a failure BUG: unable to handle page fault Workqueue: events xfrm_state_gc_task RIP: xfrm_state_gc_task+0x142/0x650 Modules linked in: esp4_offload xfrm_user [last unloaded: xfrm_iptfs] Kernel panic - not syncing: Fatal exception

• https://git.kernel.org/stable/c/2538bd3cd1ff5af655908469544ac7b7ae259386
• https://git.kernel.org/stable/c/9845a35986a658816f7752f7ebd7c455a4c7dfdf
• https://git.kernel.org/stable/c/c37a079230128a5237f45fb4e181bc069a5c2955

Published

Aug 10, 2026

Last Modified

Aug 10, 2026

Status

Received

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-6841Request Tracker is vulnerable to a reflected cross-site scri…6.1
• CVE-2026-68410In the Linux kernel, the following vulnerability has been re…
• CVE-2026-68411In the Linux kernel, the following vulnerability has been re…
• CVE-2026-68412In the Linux kernel, the following vulnerability has been re…
• CVE-2026-68413In the Linux kernel, the following vulnerability has been re…
• CVE-2026-68414In the Linux kernel, the following vulnerability has been re…
• CVE-2026-68416In the Linux kernel, the following vulnerability has been re…
• CVE-2026-68417In the Linux kernel, the following vulnerability has been re…
• CVE-2026-68418In the Linux kernel, the following vulnerability has been re…
• CVE-2026-68419In the Linux kernel, the following vulnerability has been re…
• CVE-2026-6842A flaw was found in nano. In environments with permissive um…2.5
• CVE-2026-68420In the Linux kernel, the following vulnerability has been re…