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TI-2021-02397 Aliases CVE-2021-3433

BT: Invalid channel map in CONNECT_IND results to Deadlock

Priority LOW 18CWE-703Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Invalid channel map in CONNECT_IND results to Deadlock. Zephyr versions >= v2.5.0 Improper Check or Handling of Exceptional Conditions (CWE-703). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3c2f-w4v6-qxrp

Why it matters now

EPSS 0.00208 11th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
zephyrprojectzephyrv2.5.0 and later—No fix listedCNA
  • zephyr Vendorzephyrproject Affected v2.5.0 and later Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*2.5.0 to before 2.6.0Vulnerablezephyrproject
  • cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:* Versions 2.5.0 to before 2.6.0 Vulnerable ·zephyrproject

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    zephyrproject-rtos zephyr unspecified

    6 records Highest priority Priority LOW 6 LOW

    Other records, highest priority first

    • TI-2021-02396 BT: Invalid interval in CONNECT_IND leads to Division by ZeroPriority LOW 35
    • TI-2021-02395 BT: Assertion failure on repeated LL_FEATURE_REQPriority LOW 35
    • TI-2021-02394 BT: Assertion failure on repeated LL_CONNECTION_PARAM_REQPriority LOW 35
    Show all 6 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-3433

References

Advisory 1

  • TI-2026-04422 Out-of-bounds read/write in HTTP WebSocket upgrade via non-null-terminated Sec-WebSocket-Key CVSS 3.1CRITICAL 9.8
  • TI-2026-01361 dns: memory‑safety issue in the DNS name parser CVSS 3.1CRITICAL 9.8
  • TI-2026-09174 Unterminated URI buffer causes out-of-bounds read in LwM2M firmware pull (Package URI) CVSS 3.1CRITICAL 9.1
  • TI-2026-09168 Stack buffer overflow in `net_ipaddr_parse()` IPv4 address-with-port parsing in `subsys/net/ip/utils.c` CVSS 3.1CRITICAL 9.8
  • TI-2024-09625 net: lib: http_server: Buffer Under-read CVSS 3.1HIGH 8.6
  • TI-2021-02863 Usb bluetooth device ACL read cb buffer overflow CVSS 3.1CRITICAL 9.6
See all 196 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences