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01 Record

CVE-2026-77685

Bluetooth Classic RFCOMM: integer underflow in the MCC TEST command handler leads to out-of-bounds read disclosed to the peer and out-of-bounds write

HighPUBLISHEDCNA: zephyr
CNA base score8.3 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
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02 Description

Bluetooth Classic RFCOMM: integer underflow in the MCC TEST command handler leads to out-of-bounds read disclosed to the peer and out-of-bounds write

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
Not scored by EPSS
EPSS percentile
Not scored by EPSS
NVD base score
The NVD has published no score for this record
NVD CVSS vector
No NVD score to derive
NVD analysis status
Not recorded
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-11-10 22:07Z24 MIN AGO
Last updated
2026-11-10 22:07Z24 MIN AGO
Reserved
2026-08-21
Assigning CNA
zephyr
Record state
PUBLISHED
Severity
High (CVSS 8.3)
CNA CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
Weaknesses
  • CWE-125Out-of-bounds ReadBase
  • CWE-191Integer Underflow (Wrap or Wraparound)Base
  • CWE-787Out-of-bounds WriteBase
Data version
5.2
Document digest
b3812b98b940e821cc486408f0103c0db6253979cf9cbc2c18bafa127d4c6777

05 Affected products

VendorProductVersionsPlatforms
zephyrprojectzephyr1.7.0 to < 4.5.0—

06 References