CVE-2026-80569 (GCVE-0-2026-80569)
Vulnerability from cvelistv5 – Published: 2026-08-26 14:37 – Updated: 2026-08-26 14:37
VLAI
EPSS
VEX
Title
Input: synaptics-rmi4 - bound the F54 report size to the allocated buffer
Summary
In the Linux kernel, the following vulnerability has been resolved:
Input: synaptics-rmi4 - bound the F54 report size to the allocated buffer
rmi_f54_work() reads a diagnostics report from the device into
f54->report_data, sizing the transfer with rmi_f54_get_report_size():
report_size = rmi_f54_get_report_size(f54);
...
for (i = 0; i < report_size; i += F54_REPORT_DATA_SIZE) {
int size = min(F54_REPORT_DATA_SIZE, report_size - i);
...
rmi_read_block(.., f54->report_data + i, size);
}
report_data is allocated once at probe from F54's own electrode counts
(array3_size(f54->num_tx_electrodes, f54->num_rx_electrodes, sizeof(u16))),
but rmi_f54_get_report_size() computes the size from
drv_data->num_*_electrodes when those are set, i.e. from the F55
function's electrode counts. Both counts come straight from device
queries (F54 and F55 each report up to 255 electrodes) and nothing
constrains the F55 counts to the F54 ones.
A malicious or malfunctioning RMI4 device that reports larger F55
electrode counts than its F54 counts makes report_size exceed the
allocation, so the read loop writes past report_data (and the V4L2
dequeue memcpy() then reads past it). On conforming hardware the F55
configured electrodes are a subset of the F54 physical electrodes, so
report_size never exceeds the buffer and well-behaved devices are
unaffected.
Record the allocation size and reject a report that does not fit,
mirroring the existing zero-size check.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
c762cc68b6a12eedebefc156ea4838e54804e2eb , < 6b3bdd44d4cd7d5e35de1d0f06d4930f3cecd403
(git)
Affected: c762cc68b6a12eedebefc156ea4838e54804e2eb , < b2f596f00d27703ce09167201ba57f55be8d2f9a (git) Affected: c762cc68b6a12eedebefc156ea4838e54804e2eb , < b3932101c9c457148038392bc977f9b31e125a86 (git) Affected: c762cc68b6a12eedebefc156ea4838e54804e2eb , < 12be3c6ca9589afd6ade41a59c761866e526634d (git) Affected: c762cc68b6a12eedebefc156ea4838e54804e2eb , < 42eaf0e6f79c487f419737314cf0760f7331d368 (git) Affected: c762cc68b6a12eedebefc156ea4838e54804e2eb , < 6b06aab79ff166d5781ce792d91acc2e58b1770b (git) Affected: c762cc68b6a12eedebefc156ea4838e54804e2eb , < b7b9a8b1c303b62371698e396654d6724c79cb74 (git) Affected: c762cc68b6a12eedebefc156ea4838e54804e2eb , < 49c5adc2b7d6e43c5cf033e1c86fdb9c16ababb1 (git) |
guessed | |
| Linux | Linux |
Affected:
4.10
Unaffected: 0 , < 4.10 (semver) Unaffected: 5.10.266 , ≤ 5.10.* (semver) Unaffected: 5.15.217 , ≤ 5.15.* (semver) Unaffected: 6.1.184 , ≤ 6.1.* (semver) Unaffected: 6.6.153 , ≤ 6.6.* (semver) Unaffected: 6.12.105 , ≤ 6.12.* (semver) Unaffected: 6.18.46 , ≤ 6.18.* (semver) Unaffected: 7.1.10 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/input/rmi4/rmi_f54.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
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"versionType": "git"
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{
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{
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"versionType": "git"
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{
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"versionType": "git"
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"status": "affected",
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"versionType": "git"
},
{
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"status": "affected",
"version": "c762cc68b6a12eedebefc156ea4838e54804e2eb",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/input/rmi4/rmi_f54.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.10"
},
{
"lessThan": "4.10",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.266",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.217",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.184",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.153",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.105",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.46",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.10",
"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": "5.10.266",
"versionStartIncluding": "4.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.217",
"versionStartIncluding": "4.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.184",
"versionStartIncluding": "4.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.153",
"versionStartIncluding": "4.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.105",
"versionStartIncluding": "4.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.46",
"versionStartIncluding": "4.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.10",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "4.10",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: synaptics-rmi4 - bound the F54 report size to the allocated buffer\n\nrmi_f54_work() reads a diagnostics report from the device into\nf54-\u003ereport_data, sizing the transfer with rmi_f54_get_report_size():\n\n\treport_size = rmi_f54_get_report_size(f54);\n\t...\n\tfor (i = 0; i \u003c report_size; i += F54_REPORT_DATA_SIZE) {\n\t\tint size = min(F54_REPORT_DATA_SIZE, report_size - i);\n\t\t...\n\t\trmi_read_block(.., f54-\u003ereport_data + i, size);\n\t}\n\nreport_data is allocated once at probe from F54\u0027s own electrode counts\n(array3_size(f54-\u003enum_tx_electrodes, f54-\u003enum_rx_electrodes, sizeof(u16))),\nbut rmi_f54_get_report_size() computes the size from\ndrv_data-\u003enum_*_electrodes when those are set, i.e. from the F55\nfunction\u0027s electrode counts. Both counts come straight from device\nqueries (F54 and F55 each report up to 255 electrodes) and nothing\nconstrains the F55 counts to the F54 ones.\n\nA malicious or malfunctioning RMI4 device that reports larger F55\nelectrode counts than its F54 counts makes report_size exceed the\nallocation, so the read loop writes past report_data (and the V4L2\ndequeue memcpy() then reads past it). On conforming hardware the F55\nconfigured electrodes are a subset of the F54 physical electrodes, so\nreport_size never exceeds the buffer and well-behaved devices are\nunaffected.\n\nRecord the allocation size and reject a report that does not fit,\nmirroring the existing zero-size check."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-26T14:37:31.338Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/6b3bdd44d4cd7d5e35de1d0f06d4930f3cecd403"
},
{
"url": "https://git.kernel.org/stable/c/b2f596f00d27703ce09167201ba57f55be8d2f9a"
},
{
"url": "https://git.kernel.org/stable/c/b3932101c9c457148038392bc977f9b31e125a86"
},
{
"url": "https://git.kernel.org/stable/c/12be3c6ca9589afd6ade41a59c761866e526634d"
},
{
"url": "https://git.kernel.org/stable/c/42eaf0e6f79c487f419737314cf0760f7331d368"
},
{
"url": "https://git.kernel.org/stable/c/6b06aab79ff166d5781ce792d91acc2e58b1770b"
},
{
"url": "https://git.kernel.org/stable/c/b7b9a8b1c303b62371698e396654d6724c79cb74"
},
{
"url": "https://git.kernel.org/stable/c/49c5adc2b7d6e43c5cf033e1c86fdb9c16ababb1"
}
],
"title": "Input: synaptics-rmi4 - bound the F54 report size to the allocated buffer",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-80569",
"datePublished": "2026-08-26T14:37:31.338Z",
"dateReserved": "2026-08-26T14:34:25.768Z",
"dateUpdated": "2026-08-26T14:37:31.338Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-80569\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-26T15:17:12.457\",\"lastModified\":\"2026-08-26T15:17:12.457\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nInput: synaptics-rmi4 - bound the F54 report size to the allocated buffer\\n\\nrmi_f54_work() reads a diagnostics report from the device into\\nf54-\u003ereport_data, sizing the transfer with rmi_f54_get_report_size():\\n\\n\\treport_size = rmi_f54_get_report_size(f54);\\n\\t...\\n\\tfor (i = 0; i \u003c report_size; i += F54_REPORT_DATA_SIZE) {\\n\\t\\tint size = min(F54_REPORT_DATA_SIZE, report_size - i);\\n\\t\\t...\\n\\t\\trmi_read_block(.., f54-\u003ereport_data + i, size);\\n\\t}\\n\\nreport_data is allocated once at probe from F54\u0027s own electrode counts\\n(array3_size(f54-\u003enum_tx_electrodes, f54-\u003enum_rx_electrodes, sizeof(u16))),\\nbut rmi_f54_get_report_size() computes the size from\\ndrv_data-\u003enum_*_electrodes when those are set, i.e. from the F55\\nfunction\u0027s electrode counts. Both counts come straight from device\\nqueries (F54 and F55 each report up to 255 electrodes) and nothing\\nconstrains the F55 counts to the F54 ones.\\n\\nA malicious or malfunctioning RMI4 device that reports larger F55\\nelectrode counts than its F54 counts makes report_size exceed the\\nallocation, so the read loop writes past report_data (and the V4L2\\ndequeue memcpy() then reads past it). On conforming hardware the F55\\nconfigured electrodes are a subset of the F54 physical electrodes, so\\nreport_size never exceeds the buffer and well-behaved devices are\\nunaffected.\\n\\nRecord the allocation size and reject a report that does not fit,\\nmirroring the existing zero-size check.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/input/rmi4/rmi_f54.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"c762cc68b6a12eedebefc156ea4838e54804e2eb\",\"lessThan\":\"6b3bdd44d4cd7d5e35de1d0f06d4930f3cecd403\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c762cc68b6a12eedebefc156ea4838e54804e2eb\",\"lessThan\":\"b2f596f00d27703ce09167201ba57f55be8d2f9a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c762cc68b6a12eedebefc156ea4838e54804e2eb\",\"lessThan\":\"b3932101c9c457148038392bc977f9b31e125a86\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c762cc68b6a12eedebefc156ea4838e54804e2eb\",\"lessThan\":\"12be3c6ca9589afd6ade41a59c761866e526634d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c762cc68b6a12eedebefc156ea4838e54804e2eb\",\"lessThan\":\"42eaf0e6f79c487f419737314cf0760f7331d368\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c762cc68b6a12eedebefc156ea4838e54804e2eb\",\"lessThan\":\"6b06aab79ff166d5781ce792d91acc2e58b1770b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c762cc68b6a12eedebefc156ea4838e54804e2eb\",\"lessThan\":\"b7b9a8b1c303b62371698e396654d6724c79cb74\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c762cc68b6a12eedebefc156ea4838e54804e2eb\",\"lessThan\":\"49c5adc2b7d6e43c5cf033e1c86fdb9c16ababb1\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/input/rmi4/rmi_f54.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.10\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.10\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.266\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.217\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.184\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.153\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.105\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.46\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.10\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/12be3c6ca9589afd6ade41a59c761866e526634d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/42eaf0e6f79c487f419737314cf0760f7331d368\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/49c5adc2b7d6e43c5cf033e1c86fdb9c16ababb1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6b06aab79ff166d5781ce792d91acc2e58b1770b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6b3bdd44d4cd7d5e35de1d0f06d4930f3cecd403\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b2f596f00d27703ce09167201ba57f55be8d2f9a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b3932101c9c457148038392bc977f9b31e125a86\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b7b9a8b1c303b62371698e396654d6724c79cb74\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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