CVE-2026-98483
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: fix use-after-free in nfc_get_local_general_bytes
Commit 6709d4b7bc2e ("net: nfc: Fix use-after-free caused by nfc_llcp_find_local") attempted to fix a use-after-free (UAF) issue by invoking nfc_llcp_local_put(local) after accessing local->gb. However, if the reference count drops to zero, local is freed immediately, leading to a use-after-free when callers access the returned pointer. Alternative approaches using dynamic allocation (e.g. kmemdup) introduced memory leaks because callers consistently treat the returned pointer as borrowed memory.
Read full descriptionShow less
Fix this properly by refactoring nfc_llcp_general_bytes() and nfc_get_local_general_bytes() to accept a caller-provided output buffer (out_gb) and its maximum length (gb_max_len). The general bytes are safely copied into out_gb before calling nfc_llcp_local_put(local), ensuring safe lifetime management without ownership transfer complications.
Update all callers across drivers (microread, pn533, pn544, st21nfca, digital_dep, and nci) to provide their own destination buffers and pass them to nfc_get_local_general_bytes().
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/19bcfc2a56d0b82919079b5424c5a9a0ac897dcf
- https://git.kernel.org/stable/c/25bfa673adc70189c0bc872940421ae59f789cf6
- https://git.kernel.org/stable/c/2b31d0cc95856c856ada91f943fb14dfdf29a923
- https://git.kernel.org/stable/c/841af260ff477f6191872bc3b2e15488615c1827
- https://git.kernel.org/stable/c/9ede11e12f965ace97c4e0f606667f24fb41e7e1
- https://git.kernel.org/stable/c/c40f61a6a413f3eaf028e5fe367fd9749e503ab0
- https://git.kernel.org/stable/c/d8c929e9afdbc33b1876ecb97a517e850449b5bd
- https://git.kernel.org/stable/c/dcab71a7011918f6fdba7adcec02d217dcb84b8d
Raw JSON (NVD)
Show
{
"id": "CVE-2026-98483",
"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",
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{
"status": "affected",
"version": "96f2c6f272ec04083d828de46285a7d7b17d1aad",
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{
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{
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"versionType": "git"
},
{
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{
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{
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{
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{
"status": "affected",
"version": "dd6ff3f3862709ab1a12566e73b9d6a9b8f6e548",
"versionType": "git"
},
{
"status": "affected",
"version": "b3ad46e155a6d91b36c6e892019a43e3ef3c696d",
"versionType": "git"
},
{
"status": "affected",
"version": "e5207c1d69b1a9707615ab6ff9376e59fc096815",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.188",
"lessThan": "5.10.271",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.121",
"lessThan": "5.15.222",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.39",
"lessThan": "6.1.189",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.4.251",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.3.13",
"lessThan": "6.4",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.4.4",
"lessThan": "6.5",
"versionType": "semver"
}
],
"programFiles": [
"drivers/nfc/microread/microread.c",
"drivers/nfc/pn533/pn533.c",
"drivers/nfc/pn533/pn533.h",
"drivers/nfc/pn544/pn544.c",
"drivers/nfc/st21nfca/core.c",
"include/net/nfc/hci.h",
"include/net/nfc/nfc.h",
"net/nfc/core.c",
"net/nfc/digital_dep.c",
"net/nfc/llcp_core.c",
"net/nfc/nci/core.c",
"net/nfc/nfc.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.5"
},
{
"status": "unaffected",
"version": "0",
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},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
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},
{
"status": "unaffected",
"version": "6.1.189",
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},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
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},
{
"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": [
"drivers/nfc/microread/microread.c",
"drivers/nfc/pn533/pn533.c",
"drivers/nfc/pn533/pn533.h",
"drivers/nfc/pn544/pn544.c",
"drivers/nfc/st21nfca/core.c",
"include/net/nfc/hci.h",
"include/net/nfc/nfc.h",
"net/nfc/core.c",
"net/nfc/digital_dep.c",
"net/nfc/llcp_core.c",
"net/nfc/nci/core.c",
"net/nfc/nfc.h"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-18T16:16:58.940",
"references": [
{
"url": "https://git.kernel.org/stable/c/19bcfc2a56d0b82919079b5424c5a9a0ac897dcf",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/25bfa673adc70189c0bc872940421ae59f789cf6",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/2b31d0cc95856c856ada91f943fb14dfdf29a923",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/841af260ff477f6191872bc3b2e15488615c1827",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9ede11e12f965ace97c4e0f606667f24fb41e7e1",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c40f61a6a413f3eaf028e5fe367fd9749e503ab0",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d8c929e9afdbc33b1876ecb97a517e850449b5bd",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/dcab71a7011918f6fdba7adcec02d217dcb84b8d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: fix use-after-free in nfc_get_local_general_bytes\n\nCommit 6709d4b7bc2e (\"net: nfc: Fix use-after-free caused by\nnfc_llcp_find_local\") attempted to fix a use-after-free (UAF) issue by\ninvoking nfc_llcp_local_put(local) after accessing local->gb. However,\nif the reference count drops to zero, local is freed immediately,\nleading to a use-after-free when callers access the returned pointer.\nAlternative approaches using dynamic allocation (e.g. kmemdup) introduced\nmemory leaks because callers consistently treat the returned pointer as\nborrowed memory.\n\nFix this properly by refactoring nfc_llcp_general_bytes() and\nnfc_get_local_general_bytes() to accept a caller-provided output buffer\n(out_gb) and its maximum length (gb_max_len). The general bytes are\nsafely copied into out_gb before calling nfc_llcp_local_put(local),\nensuring safe lifetime management without ownership transfer complications.\n\nUpdate all callers across drivers (microread, pn533, pn544, st21nfca,\ndigital_dep, and nci) to provide their own destination buffers and pass\nthem to nfc_get_local_general_bytes()."
}
],
"lastModified": "2026-10-19T10:18:59.677",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}