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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-98247: Bluetooth: hci_codec: validate vendor codec count length

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 12a82819b0cada6e304790b1097f8f9006eb6123, 9c04b9a4d08b95dee901d24b7607c4cbd65fa0a8, a6da782fefae611e68a1aa79644065fc8ca5abcd; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1.

Low priority for now. Upgrade to Linux Linux 12a82819b0cada6e304790b1097f8f9006eb6123, 9c04b9a4d08b95dee901d24b7607c4cbd65fa0a8, a6da782fefae611e68a1aa79644065fc8ca5abcd; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_codec: validate vendor codec count length The Read Local Supported Codecs parsers consume the variable-sized standard codec array before parsing the vendor codec count. Although the initial reply-size check includes a vendor count byte in the fixed layout, it does not guarantee that the byte remains after the standard codec array. If a controller reply ends immediately after that array, calculating the vendor codec array size reads vnd_codecs->num beyond the skb data. Use skb_pull_data() to validate and consume each codec header before using its count in both command variants.

—No exploit Fix available
Published
Oct 6, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 11th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.16affected
    • 8961987f3f5fa2f2618e72304d013c8dd5e604a6 and later · before 9c04b9a4d08b95dee901d24b7607c4cbd65fa0a8affected · git
    • 8961987f3f5fa2f2618e72304d013c8dd5e604a6 and later · before a6da782fefae611e68a1aa79644065fc8ca5abcdaffected · git
    • 8961987f3f5fa2f2618e72304d013c8dd5e604a6 and later · before e4cfd3c4299105237458b27958bd7b0aa4c60795affected · git
    • 8961987f3f5fa2f2618e72304d013c8dd5e604a6 and later · before f49a543d76d48f184b34225d9c0e2fc4cbdea8ecaffected · git
    • 8961987f3f5fa2f2618e72304d013c8dd5e604a6 and later · before 12a82819b0cada6e304790b1097f8f9006eb6123affected · git
    • 8961987f3f5fa2f2618e72304d013c8dd5e604a6 and later · before d0795cfd6f655f4de84868a4f4bb41a03f037b3daffected · git
    • before 5.16not affected · semver
    • 6.1.189 and later · up to and including 6.1.*not affected · semver
    • 6.6.158 and later · up to and including 6.6.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.8-17.2.8-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-98245Oct 6, 2026 · btrfs: take commit root semaphore when iterating in mark_block_group_to_copy()
    0Monitor
  • ← EarlierCVE-2026-98246Oct 6, 2026 · Bluetooth: hci_sync: Serialize local codec list cleanup
    0Monitor
  • Later →CVE-2026-98248Oct 6, 2026 · arm64: percpu: Fix LSE operations on {8,16}-bit types
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux12a82819b0cada6e304790b1097f8f9006eb6123Vendor (CNA)
Linux Linux9c04b9a4d08b95dee901d24b7607c4cbd65fa0a8Vendor (CNA)
Linux Linuxa6da782fefae611e68a1aa79644065fc8ca5abcdVendor (CNA)
Linux Linuxd0795cfd6f655f4de84868a4f4bb41a03f037b3dVendor (CNA)
Linux Linuxe4cfd3c4299105237458b27958bd7b0aa4c60795Vendor (CNA)
Linux Linuxf49a543d76d48f184b34225d9c0e2fc4cbdea8ecVendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.158.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux7.2.8-1 · Debian:14Package registry (OSV)
debian:linux-6.126.12.113-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 5, 2026+30 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Exploit maturity— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records