HOMEVULNERABILITIESCVE-2026-31497
MEDIUM

CVE-2026-31497

Published: April 22, 2026· Updated: Apr 28, 2026

5.5
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:6.8th

Official Description

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[].

NVD Source

Technical Analysis

CVE-2026-31497 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Linux1 product
linux kernel
Source: NVD CPE · 3 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://git.kernel.org/stable/c/1019028eb124564cf7bca58a16f1df8a1ca30726
PATCHhttps://git.kernel.org/stable/c/129fa608b6ad08b8ab7178eeb2ec272c993aaccc
PATCHhttps://git.kernel.org/stable/c/21c254202f9d78abe0fcd642a92966deb92bd226
PATCHhttps://git.kernel.org/stable/c/312c4450fe23014665c163f480edd5ad2e27bbb8
PATCHhttps://git.kernel.org/stable/c/476c9262b430c38c6a701a3b8176a3f48689085b
PATCHhttps://git.kernel.org/stable/c/6fba3c3d48c927e55611a0f5ea34da88138ed0ff
PATCHhttps://git.kernel.org/stable/c/834cf890d2c3d29cbfa1ee2376c40469c28ec297
PATCHhttps://git.kernel.org/stable/c/9dd13a8641de79bc1bc93da55cdd35259a002683

All References (8)

→
https://git.kernel.org/stable/c/1019028eb124564cf7bca58a16f1df8a1ca30726Patch
→
https://git.kernel.org/stable/c/129fa608b6ad08b8ab7178eeb2ec272c993aacccPatch
→
https://git.kernel.org/stable/c/21c254202f9d78abe0fcd642a92966deb92bd226Patch
→
https://git.kernel.org/stable/c/312c4450fe23014665c163f480edd5ad2e27bbb8Patch
→
https://git.kernel.org/stable/c/476c9262b430c38c6a701a3b8176a3f48689085bPatch
→
https://git.kernel.org/stable/c/6fba3c3d48c927e55611a0f5ea34da88138ed0ffPatch
→
https://git.kernel.org/stable/c/834cf890d2c3d29cbfa1ee2376c40469c28ec297Patch
→
https://git.kernel.org/stable/c/9dd13a8641de79bc1bc93da55cdd35259a002683Patch

Quick Facts

CVE IDCVE-2026-31497
CVSS Score5.5 / 10
SeverityMEDIUM
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedApr 22, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-31497 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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