{"apiVersion":"1.0","identifier":"CVE-2026-72385","description":"In the Linux kernel, the following vulnerability has been resolved: tracing/fprobe: Fix NULL pointer dereference in fprobe_fgraph_entry() fprobe_fgraph_entry() sizes a shadow-stack reservation in one walk of the per-ip fprobe list and fills it in a second walk, both under rcu_read_lock() only. A fprobe registered on an already-live ip can become visible between the two walks, so the fill walk processes an exit_handler the sizing walk did not count and used runs past reserved_words. If the sizing walk counted nothing, fgraph_data is NULL and the first write_fprobe_header() faults: Oops: general protection fault, probably for non-canonical address ... KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:fprobe_fgraph_entry+0xa38/0xf10 kernel/trace/fprobe.c:167 Call Trace: <TASK> function_graph_enter_regs+0x44c/0xa10 kernel/trace/fgraph.c:677 ftrace_graph_func+0xc5/0x140 arch/x86/kernel/ftrace.c:671 __kernel_text_address+0x9/0x40 kernel/extable.c:78 arch_stack_walk+0x117/0x170 arch/x86/kernel/stacktrace.c:26 kmem_cache_free+0x188/0x580 mm/slub.c:6378 tcp_data_queue+0x18d/0x6550 net/ipv4/tcp_input.c:5590 [...] </TASK> The list cannot be frozen across the two walks, so skip a node that does not fit the reservation and count it as missed.","publishedAt":"2026-08-15T06:22:12","lastModifiedAt":"2026-08-17T06:18:43","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72385","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00198,"riskScore":0,"affectedProduct":"linux","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-72385","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-72385","en":"https://www.redsauce.net/en/cves/CVE-2026-72385","fr":"https://www.redsauce.net/fr/cves/CVE-2026-72385","pt":"https://www.redsauce.net/pt/cves/CVE-2026-72385","de":"https://www.redsauce.net/de/cves/CVE-2026-72385","sk":"https://www.redsauce.net/sk/cves/CVE-2026-72385","el":"https://www.redsauce.net/el/cves/CVE-2026-72385"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-72385"}}