CVE-2026-31401 (GCVE-0-2026-31401)
Vulnerability from cvelistv5
Published
2026-04-03 15:16
Modified
2026-10-19 18:35
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
HID: bpf: prevent buffer overflow in hid_hw_request
right now the returned value is considered to be always valid. However,
when playing with HID-BPF, the return value can be arbitrary big,
because it's the return value of dispatch_hid_bpf_raw_requests(), which
calls the struct_ops and we have no guarantees that the value makes
sense.
References
| URL | Tags | |
|---|---|---|
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-31401",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-16T15:08:47.196552Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-120",
"description": "CWE-120 Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-19T18:35:46.408Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/hid/bpf/hid_bpf_dispatch.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "d6efaa50af62fb0790dd1fd4e7e5506b46312510",
"status": "affected",
"version": "8bd0488b5ea58655ad6fdcbe0408ef49b16882b1",
"versionType": "git"
},
{
"lessThan": "73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1",
"status": "affected",
"version": "8bd0488b5ea58655ad6fdcbe0408ef49b16882b1",
"versionType": "git"
},
{
"lessThan": "eb57dae20fdf6f3069cdc07821fa3bb46de381d7",
"status": "affected",
"version": "8bd0488b5ea58655ad6fdcbe0408ef49b16882b1",
"versionType": "git"
},
{
"lessThan": "2b658c1c442ec1cd9eec5ead98d68662c40fe645",
"status": "affected",
"version": "8bd0488b5ea58655ad6fdcbe0408ef49b16882b1",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/hid/bpf/hid_bpf_dispatch.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.11"
},
{
"lessThan": "6.11",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.78",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.20",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"version": "6.19.10",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.78",
"versionStartIncluding": "6.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.20",
"versionStartIncluding": "6.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.19.10",
"versionStartIncluding": "6.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.0",
"versionStartIncluding": "6.11",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: bpf: prevent buffer overflow in hid_hw_request\n\nright now the returned value is considered to be always valid. However,\nwhen playing with HID-BPF, the return value can be arbitrary big,\nbecause it\u0027s the return value of dispatch_hid_bpf_raw_requests(), which\ncalls the struct_ops and we have no guarantees that the value makes\nsense."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The vulnerable `memcpy()` is reached through local `bpf()` operations that load/attach HID-BPF `struct_ops` programs and run a HID-BPF syscall program; it is not reachable directly from remote packets or unauthenticated HID traffic alone.\nAC:L - An attacker who can load the needed HID-BPF programs controls the oversized `hid_hw_request` callback return value and can invoke `hid_bpf_hw_request()` directly, with no race or external timing condition.\nPR:L - Loading HID-BPF requires BPF privileges such as CAP_BPF/CAP_PERFMON, but these can be delegated through BPF tokens into non-init user namespaces in plausible containerized deployments. Choosing the higher-severity option, this is treated as low rather than high privileges.\nUI:N - No victim interaction is required after the attacker has local BPF access; the attacker can attach the callback and run the syscall BPF program themselves.\nS:U - The corruption occurs within the kernel security authority and represents a standard local kernel compromise path, not a VM escape or other cross-scope boundary.\nC:H - The unchecked return value causes an out-of-bounds read from the `dma_data` kernel heap buffer into BPF-accessible memory, allowing disclosure of adjacent kernel memory. As memory corruption, it is also potentially usable to build stronger read primitives.\nI:H - The same unchecked return value is used as the length for `memcpy()` into the caller-provided BPF memory buffer, producing an out-of-bounds kernel write. Such kernel memory corruption is defensibly capable of arbitrary modification or control-flow compromise.\nA:H - A large attacker-controlled copy length can corrupt kernel memory or fault during the copy, causing an oops, panic, or system crash."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T12:22:09.102Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/d6efaa50af62fb0790dd1fd4e7e5506b46312510"
},
{
"url": "https://git.kernel.org/stable/c/73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1"
},
{
"url": "https://git.kernel.org/stable/c/eb57dae20fdf6f3069cdc07821fa3bb46de381d7"
},
{
"url": "https://git.kernel.org/stable/c/2b658c1c442ec1cd9eec5ead98d68662c40fe645"
}
],
"title": "HID: bpf: prevent buffer overflow in hid_hw_request",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-31401",
"datePublished": "2026-04-03T15:16:04.903Z",
"dateReserved": "2026-03-09T15:48:24.086Z",
"dateUpdated": "2026-10-19T18:35:46.408Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T12:22:09.102Z\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nHID: bpf: prevent buffer overflow in hid_hw_request\\n\\nright now the returned value is considered to be always valid. However,\\nwhen playing with HID-BPF, the return value can be arbitrary big,\\nbecause it\u0027s the return value of dispatch_hid_bpf_raw_requests(), which\\ncalls the struct_ops and we have no guarantees that the value makes\\nsense.\"}], \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:L - The vulnerable `memcpy()` is reached through local `bpf()` operations that load/attach HID-BPF `struct_ops` programs and run a HID-BPF syscall program; it is not reachable directly from remote packets or unauthenticated HID traffic alone.\\nAC:L - An attacker who can load the needed HID-BPF programs controls the oversized `hid_hw_request` callback return value and can invoke `hid_bpf_hw_request()` directly, with no race or external timing condition.\\nPR:L - Loading HID-BPF requires BPF privileges such as CAP_BPF/CAP_PERFMON, but these can be delegated through BPF tokens into non-init user namespaces in plausible containerized deployments. Choosing the higher-severity option, this is treated as low rather than high privileges.\\nUI:N - No victim interaction is required after the attacker has local BPF access; the attacker can attach the callback and run the syscall BPF program themselves.\\nS:U - The corruption occurs within the kernel security authority and represents a standard local kernel compromise path, not a VM escape or other cross-scope boundary.\\nC:H - The unchecked return value causes an out-of-bounds read from the `dma_data` kernel heap buffer into BPF-accessible memory, allowing disclosure of adjacent kernel memory. As memory corruption, it is also potentially usable to build stronger read primitives.\\nI:H - The same unchecked return value is used as the length for `memcpy()` into the caller-provided BPF memory buffer, producing an out-of-bounds kernel write. Such kernel memory corruption is defensibly capable of arbitrary modification or control-flow compromise.\\nA:H - A large attacker-controlled copy length can corrupt kernel memory or fault during the copy, causing an oops, panic, or system crash.\"}]}], \"affected\": [{\"product\": \"Linux\", \"vendor\": \"Linux\", \"defaultStatus\": \"unaffected\", \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"programFiles\": [\"drivers/hid/bpf/hid_bpf_dispatch.c\"], \"versions\": [{\"version\": \"8bd0488b5ea58655ad6fdcbe0408ef49b16882b1\", \"lessThan\": \"d6efaa50af62fb0790dd1fd4e7e5506b46312510\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"8bd0488b5ea58655ad6fdcbe0408ef49b16882b1\", \"lessThan\": \"73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"8bd0488b5ea58655ad6fdcbe0408ef49b16882b1\", \"lessThan\": \"eb57dae20fdf6f3069cdc07821fa3bb46de381d7\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"8bd0488b5ea58655ad6fdcbe0408ef49b16882b1\", \"lessThan\": \"2b658c1c442ec1cd9eec5ead98d68662c40fe645\", \"status\": \"affected\", \"versionType\": \"git\"}]}, {\"product\": \"Linux\", \"vendor\": \"Linux\", \"defaultStatus\": \"affected\", \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"programFiles\": [\"drivers/hid/bpf/hid_bpf_dispatch.c\"], \"versions\": [{\"version\": \"6.11\", \"status\": \"affected\"}, {\"version\": \"0\", \"lessThan\": \"6.11\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"6.12.78\", \"lessThanOrEqual\": \"6.12.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"6.18.20\", \"lessThanOrEqual\": \"6.18.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"6.19.10\", \"lessThanOrEqual\": \"6.19.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"7.0\", \"lessThanOrEqual\": \"*\", \"status\": \"unaffected\", \"versionType\": \"original_commit_for_fix\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.11\", \"versionEndExcluding\": \"6.12.78\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.11\", \"versionEndExcluding\": \"6.18.20\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.11\", \"versionEndExcluding\": \"6.19.10\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.11\", \"versionEndExcluding\": \"7.0\"}]}]}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/d6efaa50af62fb0790dd1fd4e7e5506b46312510\"}, {\"url\": \"https://git.kernel.org/stable/c/73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1\"}, {\"url\": \"https://git.kernel.org/stable/c/eb57dae20fdf6f3069cdc07821fa3bb46de381d7\"}, {\"url\": \"https://git.kernel.org/stable/c/2b658c1c442ec1cd9eec5ead98d68662c40fe645\"}], \"title\": \"HID: bpf: prevent buffer overflow in hid_hw_request\", \"x_generator\": {\"engine\": \"bippy-1.2.0\"}}, \"adp\": [{\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-31401\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-16T15:08:47.196552Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-120\", \"description\": \"CWE-120 Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-10-16T15:08:47.871Z\"}, \"title\": \"CISA ADP Vulnrichment\"}]}",
"cveMetadata": "{\"cveId\": \"CVE-2026-31401\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"Linux\", \"dateReserved\": \"2026-03-09T15:48:24.086Z\", \"datePublished\": \"2026-04-03T15:16:04.903Z\", \"dateUpdated\": \"2026-10-19T18:35:46.408Z\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
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.
Loading…
Loading…