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NVD / CVE Program· CNA Linux

CVE-2026-31497: Bluetooth: btusb: clamp SCO altsetting table indices

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.12% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 1019028eb124564cf7bca58a16f1df8a1ca30726, 129fa608b6ad08b8ab7178eeb2ec272c993aaccc, 21c254202f9d78abe0fcd642a92966deb92bd226; azl3 kernel 6.6.130.1-3 on Azure Linux 3.0 6.6.134.1-2; cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 1019028eb124564cf7bca58a16f1df8a1ca30726, 129fa608b6ad08b8ab7178eeb2ec272c993aaccc, 21c254202f9d78abe0fcd642a92966deb92bd226; azl3 kernel 6.6.130.1-3 on Azure Linux 3.0 6.6.134.1-2; cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0 Release Notes 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: btusb: clamp SCO altsetting table indices btusb_work() maps the number of active SCO links to USB alternate settings through a three-entry lookup table when CVSD traffic uses transparent voice settings. The lookup currently indexes alts[] with data->sco_num - 1 without first constraining sco_num to the number of available table entries. While the table only defines alternate settings for up to three SCO links, data->sco_num comes from hci_conn_num() and is used directly. Cap the lookup to the last table entry before indexing it so the driver keeps selecting the highest supported alternate setting without reading past alts[].

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Apr 22, 2026
Updated
Jun 17, 2026
EPSS
0.1% · 2th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.8.1 and later · before 5.10.253
  • linux linux kernel5.11 and later · before 5.15.203
  • linux linux kernel5.16 and later · before 6.1.168
  • linux linux kernel6.2 and later · before 6.6.131
  • linux linux kernel6.7 and later · before 6.12.80
  • linux linux kernel6.13 and later · before 6.18.21
  • linux linux kernel6.19 and later · before 6.19.11
  • linux linux kernel5.8
  • linux linux kernel7.0

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

    • 5.8affected
    • baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 and later · before 312c4450fe23014665c163f480edd5ad2e27bbb8affected · git
    • baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 and later · before 9dd13a8641de79bc1bc93da55cdd35259a002683affected · git
    • baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 and later · before 476c9262b430c38c6a701a3b8176a3f48689085baffected · git
    • baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 and later · before 6fba3c3d48c927e55611a0f5ea34da88138ed0ffaffected · git
    • baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 and later · before 834cf890d2c3d29cbfa1ee2376c40469c28ec297affected · git
    • baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 and later · before 1019028eb124564cf7bca58a16f1df8a1ca30726affected · git
    • baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 and later · before 21c254202f9d78abe0fcd642a92966deb92bd226affected · git
    • baac6276c0a9f36f1fe1f00590ef00d2ba5ba626 and later · before 129fa608b6ad08b8ab7178eeb2ec272c993aacccaffected · git
    • before 5.8not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.11-16.19.11-1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7_Update_19before 1-150700.15.3.41-150700.15.3.4
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7-RT_Update_18before 1-150700.1.5.11-150700.1.5.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7kernel-64kbbefore 6.4.0-150700.53.73.26.4.0-150700.53.73.2
SUSE:Linux Enterprise Module for Basesystem 15 SP7kernel-defaultbefore 6.4.0-150700.53.73.26.4.0-150700.53.73.2
SUSE:Linux Enterprise Module for Basesystem 15 SP7kernel-default-basebefore 6.4.0-150700.53.73.2.150700.17.41.46.4.0-150700.53.73.2.150700.17.41.4
SUSE:Linux Enterprise Module for Basesystem 15 SP7kernel-sourcebefore 6.4.0-150700.53.73.16.4.0-150700.53.73.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7kernel-zfcpdumpbefore 6.4.0-150700.53.73.26.4.0-150700.53.73.2
SUSE:Linux Enterprise Module for Development Tools 15 SP7kernel-docsbefore 6.4.0-150700.53.73.16.4.0-150700.53.73.1
SUSE:Linux Enterprise Module for Development Tools 15 SP7kernel-obs-buildbefore 6.4.0-150700.53.73.26.4.0-150700.53.73.2
SUSE:Linux Enterprise Module for Development Tools 15 SP7kernel-symsbefore 6.4.0-150700.53.73.16.4.0-150700.53.73.1
SUSE:Linux Enterprise Module for Public Cloud 15 SP7kernel-azurebefore 6.4.0-150700.53.73.26.4.0-150700.53.73.2
SUSE:Real Time Module 15 SP7kernel-rtbefore 6.4.0-150700.7.67.16.4.0-150700.7.67.1
SUSE:Real Time Module 15 SP7kernel-source-rtbefore 6.4.0-150700.7.67.16.4.0-150700.7.67.1
SUSE:Real Time Module 15 SP7kernel-syms-rtbefore 6.4.0-150700.7.67.16.4.0-150700.7.67.1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-31491Apr 22, 2026 · RDMA/irdma: Harden depth calculation functions
    22Monitor
  • ← EarlierCVE-2026-31492Apr 22, 2026 · RDMA/irdma: Initialize free_qp completion before using it
    22Monitor
  • Later →CVE-2026-31498Apr 22, 2026 · Bluetooth: L2CAP: Fix ERTM re-init and zero pdu_len infinite loop
    22Monitor

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 Linux1019028eb124564cf7bca58a16f1df8a1ca30726Vendor (CNA)
Linux Linux129fa608b6ad08b8ab7178eeb2ec272c993aacccVendor (CNA)
Linux Linux21c254202f9d78abe0fcd642a92966deb92bd226Vendor (CNA)
Linux Linux312c4450fe23014665c163f480edd5ad2e27bbb8Vendor (CNA)
Linux Linux476c9262b430c38c6a701a3b8176a3f48689085bVendor (CNA)
Linux Linux6fba3c3d48c927e55611a0f5ea34da88138ed0ffVendor (CNA)
Linux Linux834cf890d2c3d29cbfa1ee2376c40469c28ec297Vendor (CNA)
Linux Linux9dd13a8641de79bc1bc93da55cdd35259a002683Vendor (CNA)
azl3 kernel 6.6.130.1-3 on Azure Linux 3.06.6.134.1-2 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0Release NotesMicrosoft (MSRC)
debian:linux6.1.170-1 · Debian:12Package registry (OSV)
suse:kernel-64kb6.4.0-150700.53.73.2 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:kernel-default6.4.0-150700.53.73.2 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:kernel-default-base6.4.0-150700.53.73.2.150700.17.41.4 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:kernel-docs6.4.0-150700.53.73.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7-RT_Update_181-150700.1.5.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-obs-build6.4.0-150700.53.73.2 · SUSE:Linux Enterprise Module for Development Tools 15 SP7Package registry (OSV)
suse:kernel-rt6.4.0-150700.7.67.1 · SUSE:Real Time Module 15 SP7Package registry (OSV)
suse:kernel-source6.4.0-150700.53.73.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:kernel-source-rt6.4.0-150700.7.67.1 · SUSE:Real Time Module 15 SP7Package registry (OSV)
suse:kernel-syms6.4.0-150700.53.73.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7Package registry (OSV)
suse:kernel-syms-rt6.4.0-150700.7.67.1 · SUSE:Real Time Module 15 SP7Package registry (OSV)
suse:kernel-zfcpdump6.4.0-150700.53.73.2 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package 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.

No dated events beyond publication.

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

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

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. Fix✗ → ✓

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

References

Show all references (7 more)

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

All records