What’s Vulnerable › Vulnerabilities

CVE-2021-3588: memory contents disclosure in cli_feat_read_cb

• Severity: low (CVSS 3.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-06-10 · updated 2026-06-17
• Weakness: CWE-125

Description

The cli_feat_read_cb() function in src/gatt-database.c does not perform bounds checks on the 'offset' variable before using it as an index into an array for reading.

Affected products

• BlueZ: before 5.56 — fixed in 5.56

How to fix

Upgrade to a fixed version: BlueZ 5.56. Check the vendor advisory for mitigations.

References

• https://github.com/bluez/bluez/issues/70
• https://security.gentoo.org/glsa/202209-16
• https://github.com/bluez/bluez/issues/70
• https://security.gentoo.org/glsa/202209-16

Get alerted when CVE-2021-3588 or the next vulnerability affects your stack