CVE-2026-98482
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:
nfc: llcp: drop truncated I/RR/RNR PDUs in nfc_llcp_recv_hdlc()
nfc_llcp_recv_hdlc() reads the sequence byte skb->data[2], via nfc_llcp_ns()/nfc_llcp_nr(), before any length check. The receive path only guarantees the two-byte LLCP header -- __nfc_llcp_recv() checks it with pskb_may_pull() and nfc_llcp_recv_agf() admits two-byte inner PDUs -- so a two-byte I, RR or RNR PDU reads one byte of uninitialised skb tailroom. The byte becomes N(R)/N(S); a peer can already set those with a well-formed PDU, so this is acting on uninitialised memory, not new peer control.
Read full descriptionShow less
Guard the read with pskb_may_pull(), as commit 95674f506c63 ("nfc: llcp: reject PDUs shorter than the LLCP header") did for the two-byte header, so the sequence byte is present and linear before it is read. RR and RNR PDUs are LLCP_HEADER_SIZE + LLCP_SEQUENCE_SIZE bytes and an I PDU is longer, so no valid frame is rejected; a truncated PDU is malformed, so return without a DM reply.
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
- 10/20/2026
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/066205553a0106565bcede934f5721c25ebd6e4e
- https://git.kernel.org/stable/c/18f60ee882403d5b48097f5f6ae45f794e4cc643
- https://git.kernel.org/stable/c/273f9d667cde649f8de9d72b1303cc2f4b658c50
- https://git.kernel.org/stable/c/3afdbebfee2ef7e9510880868cfb482cbffe6836
- https://git.kernel.org/stable/c/51b6d73373589abb9de4d84767b0db1bc8d395d9
- https://git.kernel.org/stable/c/744e61bd06188d8bb068c26a461c252f242b05c9
- https://git.kernel.org/stable/c/810f204ef8f61f0c930cf6b3280050b3ee6a8ae7
- https://git.kernel.org/stable/c/9b4086eb67a9a3b1ce69fef1b6793827363703ce
Raw JSON (NVD)
Show
{
"id": "CVE-2026-98482",
"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": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
"lessThan": "3afdbebfee2ef7e9510880868cfb482cbffe6836",
"versionType": "git"
},
{
"status": "affected",
"version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
"lessThan": "9b4086eb67a9a3b1ce69fef1b6793827363703ce",
"versionType": "git"
},
{
"status": "affected",
"version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
"lessThan": "51b6d73373589abb9de4d84767b0db1bc8d395d9",
"versionType": "git"
},
{
"status": "affected",
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"lessThan": "066205553a0106565bcede934f5721c25ebd6e4e",
"versionType": "git"
},
{
"status": "affected",
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"versionType": "git"
},
{
"status": "affected",
"version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
"lessThan": "810f204ef8f61f0c930cf6b3280050b3ee6a8ae7",
"versionType": "git"
},
{
"status": "affected",
"version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
"lessThan": "744e61bd06188d8bb068c26a461c252f242b05c9",
"versionType": "git"
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{
"status": "affected",
"version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
"lessThan": "273f9d667cde649f8de9d72b1303cc2f4b658c50",
"versionType": "git"
}
],
"programFiles": [
"net/nfc/llcp_core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.3",
"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/nfc/llcp_core.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-18T16:16:58.817",
"references": [
{
"url": "https://git.kernel.org/stable/c/066205553a0106565bcede934f5721c25ebd6e4e",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/18f60ee882403d5b48097f5f6ae45f794e4cc643",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/273f9d667cde649f8de9d72b1303cc2f4b658c50",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/3afdbebfee2ef7e9510880868cfb482cbffe6836",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/51b6d73373589abb9de4d84767b0db1bc8d395d9",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/744e61bd06188d8bb068c26a461c252f242b05c9",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/810f204ef8f61f0c930cf6b3280050b3ee6a8ae7",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9b4086eb67a9a3b1ce69fef1b6793827363703ce",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: drop truncated I/RR/RNR PDUs in nfc_llcp_recv_hdlc()\n\nnfc_llcp_recv_hdlc() reads the sequence byte skb->data[2], via\nnfc_llcp_ns()/nfc_llcp_nr(), before any length check. The receive path\nonly guarantees the two-byte LLCP header -- __nfc_llcp_recv() checks it\nwith pskb_may_pull() and nfc_llcp_recv_agf() admits two-byte inner PDUs\n-- so a two-byte I, RR or RNR PDU reads one byte of uninitialised skb\ntailroom. The byte becomes N(R)/N(S); a peer can already set those with\na well-formed PDU, so this is acting on uninitialised memory, not new\npeer control.\n\nGuard the read with pskb_may_pull(), as commit 95674f506c63 (\"nfc: llcp:\nreject PDUs shorter than the LLCP header\") did for the two-byte header,\nso the sequence byte is present and linear before it is read. RR and RNR\nPDUs are LLCP_HEADER_SIZE + LLCP_SEQUENCE_SIZE bytes and an I PDU is\nlonger, so no valid frame is rejected; a truncated PDU is malformed, so\nreturn without a DM reply."
}
],
"lastModified": "2026-10-19T10:18:59.507",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}