CVE-2026-72385 (GCVE-0-2026-72385)
Vulnerability from cvelistv5
Published
2026-08-15 05:56
Modified
2026-08-17 05:13
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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.
References
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"kernel/trace/fprobe.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "62988204162fc382cfc7d9a185d40a751261e3a3",
"status": "affected",
"version": "4346ba1604093305a287e08eb465a9c15ba05b80",
"versionType": "git"
},
{
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{
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"versionType": "git"
}
]
},
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"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.14"
},
{
"lessThan": "6.14",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.40",
"versionStartIncluding": "6.14",
"vulnerable": true
},
{
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"vulnerable": true
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{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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 \u003cTASK\u003e\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 \u003c/TASK\u003e\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."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T05:13:38.517Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/62988204162fc382cfc7d9a185d40a751261e3a3"
},
{
"url": "https://git.kernel.org/stable/c/d655cca1c6e67eb081214d37eb231a869ead2f97"
},
{
"url": "https://git.kernel.org/stable/c/367c49d6e283c17b56a31e7a8d964a079244264c"
}
],
"title": "tracing/fprobe: Fix NULL pointer dereference in fprobe_fgraph_entry()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-72385",
"datePublished": "2026-08-15T05:56:16.050Z",
"dateReserved": "2026-08-09T03:40:39.923Z",
"dateUpdated": "2026-08-17T05:13:38.517Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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