01 Record
CVE-2021-3455
Disconnecting L2CAP channel right after invalid ATT request leads freeze
MediumPUBLISHEDCNA: zephyr
CNA base score4.3 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
02 Description
Disconnecting L2CAP channel right after invalid ATT request leads freeze
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
- 1.10% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 65.6% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- 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
- 2021-10-19 22:25Z5 YR AGO
- Last updated
- 2024-09-16 18:38Z2 YR AGO
- Reserved
- 2021-03-19
- Assigning CNA
- zephyr
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 4.3)
- CNA CVSS vector
- CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Weaknesses
- CWE-416Use After FreeVariant
- Data version
- 5.1
- Document digest
- b690f5369f0240ac08ac40b5f15fa65d1f2550732b40de02fc8f8b303c8f65ef
05 Affected products
VendorProductVersionsPlatforms