VulnerabilityPublished 18 Oct 2026

CVE-2026-98459: Linux kernel · Bluetooth: ISO: balance the parent hold in hci_bind_bis()

Source GCVE Database

Authoritative record:CVE-2026-98459· Medium

Not known to be exploited · fixed in ff28e6c67143c76ef50c3eac01f2fad411705f71 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:16 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in ff28e6c67143c76ef50c3eac01f2fad411705f71, bbcd723ee7a84bc868142fd57717af88e54e555a, 6.6.158 +3

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-w8fc-m2x5-xcfp

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected >=6.6.67 <6.6.158	Fixed in ff28e6c67143c76ef50c3eac01f2fad411705f71 bbcd723ee7a84bc868142fd57717af88e54e555a 6.6.158 4e49206d9574a4c109480198e73aea34ad0ed7f6 4c94557dd02569efa6c1072a0439addaef9a5224 03a91cdf6862fb351a74f035ad21e70112438552
LinuxLinux	Affected =6.8	Fixed in–

AI-suggested

A fix has been implemented in the Linux kernel to properly balance the parent connection holds in hci_bind_bis(). Users should apply the official Linux kernel updates that include this fix. Since this is a kernel-level issue, updating to a patched kernel version is the recommended remediation.

Description

A vulnerability in the Linux kernel Bluetooth ISO subsystem related to reference counting in hci_bind_bis() has been resolved. The issue involves improper balancing of parent connection holds, which could lead to premature disconnection of a parent connection while its socket is still in use. The fix ensures that a hold is taken on the parent connection before linking and properly dropped if linking fails, preventing potential use-after-free or disconnection issues.

References

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