CVE-2026-98461
Status: ReceivedUnscored—
Severity—Unscored
Exploitation probability0.21 %higher than 11% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: hci_sock: validate event length before filtering
is_filtered_packet() reads the event code from skb->data[0] without first checking that the skb is nonempty. When an opcode filter is configured, it also reads the command opcode at offsets 3 or 4 without checking that a Command Complete or Command Status event is long enough.
hci_send_to_sock() invokes the filter before hci_event_packet() validates the event header. A malformed event supplied by a controller or a vhci device can therefore cause an out-of-bounds read.
Keep the unmasked event code for the opcode checks. The masked value is needed for the 64-bit event bitmap, but using it to identify command events aliases event codes above 0x3f.
Read full descriptionShow less
In particular, Synchronous Train Complete (0x4f) was treated as Command Status (0x0f) even though its payload has no opcode.
Reject actual command events that are too short for the field being inspected. A truncated command event cannot match a configured opcode.
CVSS
NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days
- 0.21 %
- Percentile among all scored CVEs
- 11
- Score date
- 10/21/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (1)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
References
Show 8 references
- https://git.kernel.org/stable/c/1a92763c2ba721bf113cd83f913fe8c511b4a4dc
- https://git.kernel.org/stable/c/2501a3b7b7144d1d11939b355a48ed01f83d0c62
- https://git.kernel.org/stable/c/3976bbcd43b9b94c53ac9b0fd28888011588f4cc
- https://git.kernel.org/stable/c/39e99d85071bca0feeec3164a9437ca1bff297fc
- https://git.kernel.org/stable/c/b0a6cf99afd57a39598b1beca0e86ef5004980de
- https://git.kernel.org/stable/c/dca25c204f71be0556a15177dbe037237ac43e5e
- https://git.kernel.org/stable/c/ebdd49cec380731844ed9df4092a29a014623df4
- https://git.kernel.org/stable/c/f894f6292d5122cd62d30600736b4a0ae79f7770
Raw JSON (NVD)
Show
{
"id": "CVE-2026-98461",
"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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "39e99d85071bca0feeec3164a9437ca1bff297fc",
"versionType": "git"
},
{
"status": "affected",
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "ebdd49cec380731844ed9df4092a29a014623df4",
"versionType": "git"
},
{
"status": "affected",
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "2501a3b7b7144d1d11939b355a48ed01f83d0c62",
"versionType": "git"
},
{
"status": "affected",
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"versionType": "git"
},
{
"status": "affected",
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"versionType": "git"
},
{
"status": "affected",
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "f894f6292d5122cd62d30600736b4a0ae79f7770",
"versionType": "git"
},
{
"status": "affected",
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{
"status": "affected",
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"versionType": "git"
}
],
"programFiles": [
"net/bluetooth/hci_sock.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bluetooth/hci_sock.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-18T16:16:56.543",
"references": [
{
"url": "https://git.kernel.org/stable/c/1a92763c2ba721bf113cd83f913fe8c511b4a4dc",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/2501a3b7b7144d1d11939b355a48ed01f83d0c62",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/3976bbcd43b9b94c53ac9b0fd28888011588f4cc",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/39e99d85071bca0feeec3164a9437ca1bff297fc",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b0a6cf99afd57a39598b1beca0e86ef5004980de",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/dca25c204f71be0556a15177dbe037237ac43e5e",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ebdd49cec380731844ed9df4092a29a014623df4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f894f6292d5122cd62d30600736b4a0ae79f7770",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sock: validate event length before filtering\n\nis_filtered_packet() reads the event code from skb->data[0] without first\nchecking that the skb is nonempty. When an opcode filter is configured,\nit also reads the command opcode at offsets 3 or 4 without checking that\na Command Complete or Command Status event is long enough.\n\nhci_send_to_sock() invokes the filter before hci_event_packet() validates\nthe event header. A malformed event supplied by a controller or a vhci\ndevice can therefore cause an out-of-bounds read.\n\nKeep the unmasked event code for the opcode checks. The masked value is\nneeded for the 64-bit event bitmap, but using it to identify command events\naliases event codes above 0x3f. In particular, Synchronous Train Complete\n(0x4f) was treated as Command Status (0x0f) even though its payload has no\nopcode.\n\nReject actual command events that are too short for the field being\ninspected. A truncated command event cannot match a configured opcode."
}
],
"lastModified": "2026-10-19T10:18:55.667",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}