CVE-2026-72385
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:
The list cannot be frozen across the two walks, so skip a node that does not fit the reservation and count it as missed.
Detalles técnicos trazas, registros y código del informe original
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>
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-72385",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4346ba1604093305a287e08eb465a9c15ba05b80",
"lessThan": "62988204162fc382cfc7d9a185d40a751261e3a3",
"versionType": "git"
},
{
"status": "affected",
"version": "4346ba1604093305a287e08eb465a9c15ba05b80",
"lessThan": "d655cca1c6e67eb081214d37eb231a869ead2f97",
"versionType": "git"
},
{
"status": "affected",
"version": "4346ba1604093305a287e08eb465a9c15ba05b80",
"lessThan": "367c49d6e283c17b56a31e7a8d964a079244264c",
"versionType": "git"
}
],
"programFiles": [
"kernel/trace/fprobe.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/trace/fprobe.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-08-15T06:22:12.017",
"references": [
{
"url": "https://git.kernel.org/stable/c/367c49d6e283c17b56a31e7a8d964a079244264c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/62988204162fc382cfc7d9a185d40a751261e3a3",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d655cca1c6e67eb081214d37eb231a869ead2f97",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing/fprobe: Fix NULL pointer dereference in fprobe_fgraph_entry()\n\nfprobe_fgraph_entry() sizes a shadow-stack reservation in one walk of\nthe per-ip fprobe list and fills it in a second walk, both under\nrcu_read_lock() only. A fprobe registered on an already-live ip can\nbecome visible between the two walks, so the fill walk processes an\nexit_handler the sizing walk did not count and used runs past\nreserved_words. If the sizing walk counted nothing, fgraph_data is NULL\nand the first write_fprobe_header() faults:\n\n Oops: general protection fault, probably for non-canonical address ...\n KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n RIP: 0010:fprobe_fgraph_entry+0xa38/0xf10 kernel/trace/fprobe.c:167\n Call Trace:\n <TASK>\n function_graph_enter_regs+0x44c/0xa10 kernel/trace/fgraph.c:677\n ftrace_graph_func+0xc5/0x140 arch/x86/kernel/ftrace.c:671\n __kernel_text_address+0x9/0x40 kernel/extable.c:78\n arch_stack_walk+0x117/0x170 arch/x86/kernel/stacktrace.c:26\n kmem_cache_free+0x188/0x580 mm/slub.c:6378\n tcp_data_queue+0x18d/0x6550 net/ipv4/tcp_input.c:5590\n [...]\n </TASK>\n\nThe list cannot be frozen across the two walks, so skip a node that does\nnot fit the reservation and count it as missed."
}
],
"lastModified": "2026-08-17T06:18:43.310",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}