CVE-2026-98459
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: ISO: balance the parent hold in hci_bind_bis()
hci_conn_link() takes a lifetime reference to its parent with hci_conn_get(), but only takes an operational hold on the child. hci_conn_unlink() later balances both a hold and a reference on the parent.
The SCO and CIS paths pass a parent acquired from a connect helper, so it already has a hold. For an additional BIS, hci_bind_bis() obtains the parent from hci_conn_hash_lookup_big(), which returns a bare pointer. Unlinking the child then drops the parent's existing hold and can schedule it for disconnection while its socket is still using it.
Read full descriptionShow less
Take a hold on the parent before linking it and drop that hold if linking fails. A successful link transfers the hold to hci_conn_unlink().
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
- 0.17 %
- Percentile among all scored CVEs
- 6
- 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 5 references
- https://git.kernel.org/stable/c/03a91cdf6862fb351a74f035ad21e70112438552
- https://git.kernel.org/stable/c/4c94557dd02569efa6c1072a0439addaef9a5224
- https://git.kernel.org/stable/c/4e49206d9574a4c109480198e73aea34ad0ed7f6
- https://git.kernel.org/stable/c/bbcd723ee7a84bc868142fd57717af88e54e555a
- https://git.kernel.org/stable/c/ff28e6c67143c76ef50c3eac01f2fad411705f71
Raw JSON (NVD)
Show
{
"id": "CVE-2026-98459",
"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": "11dc486ed5d4626e6b92a23b67ed76cb6c48bfc9",
"lessThan": "ff28e6c67143c76ef50c3eac01f2fad411705f71",
"versionType": "git"
},
{
"status": "affected",
"version": "fa224d0c094a458e9ebf5ea9b1c696136b7af427",
"lessThan": "03a91cdf6862fb351a74f035ad21e70112438552",
"versionType": "git"
},
{
"status": "affected",
"version": "fa224d0c094a458e9ebf5ea9b1c696136b7af427",
"lessThan": "4e49206d9574a4c109480198e73aea34ad0ed7f6",
"versionType": "git"
},
{
"status": "affected",
"version": "fa224d0c094a458e9ebf5ea9b1c696136b7af427",
"lessThan": "bbcd723ee7a84bc868142fd57717af88e54e555a",
"versionType": "git"
},
{
"status": "affected",
"version": "fa224d0c094a458e9ebf5ea9b1c696136b7af427",
"lessThan": "4c94557dd02569efa6c1072a0439addaef9a5224",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.67",
"lessThan": "6.6.158",
"versionType": "semver"
}
],
"programFiles": [
"net/bluetooth/hci_conn.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.8",
"versionType": "semver"
},
{
"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_conn.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-18T16:16:56.327",
"references": [
{
"url": "https://git.kernel.org/stable/c/03a91cdf6862fb351a74f035ad21e70112438552",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/4c94557dd02569efa6c1072a0439addaef9a5224",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/4e49206d9574a4c109480198e73aea34ad0ed7f6",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/bbcd723ee7a84bc868142fd57717af88e54e555a",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ff28e6c67143c76ef50c3eac01f2fad411705f71",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: balance the parent hold in hci_bind_bis()\n\nhci_conn_link() takes a lifetime reference to its parent with\nhci_conn_get(), but only takes an operational hold on the child.\nhci_conn_unlink() later balances both a hold and a reference on the\nparent.\n\nThe SCO and CIS paths pass a parent acquired from a connect helper, so\nit already has a hold. For an additional BIS, hci_bind_bis() obtains the\nparent from hci_conn_hash_lookup_big(), which returns a bare pointer.\nUnlinking the child then drops the parent's existing hold and can\nschedule it for disconnection while its socket is still using it.\n\nTake a hold on the parent before linking it and drop that hold if linking\nfails. A successful link transfers the hold to hci_conn_unlink()."
}
],
"lastModified": "2026-10-19T10:18:55.390",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}