Double Free in Arm Mbed TLS
CVE-2021-44732
Mbed TLS before 3.0.1 has a double free in certain out-of-memory conditions, as demonstrated by an mbedtls_ssl_set_session() failure.
Vulnerability class: Double Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.028 (86.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.028 · change: +0.002
Affected products
- Arm Mbed TLS
- Trustedfirmware Mbed TLS — versions 3.0.0
- Debian Linux — versions 10.0
Weakness classification (CWE)
References
- github.com/ARMmbed/mbedtls/releases (Release Notes)
- tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-12 (Exploit, Third Party Advisory, Mitigation)
- bugs.gentoo.org/829660 (Mailing List, Third Party Advisory, Issue Tracking)
- github.com/ARMmbed/mbedtls/releases/tag/v2.16.12 (Release Notes)
- github.com/ARMmbed/mbedtls/releases/tag/v2.28.0 (Release Notes)
- github.com/ARMmbed/mbedtls/releases/tag/v3.1.0 (Release Notes)
- lists.debian.org/debian-lts-announce/2022/12/msg00036.html (mailing-list, Mailing List, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2021-44732?
- CVE-2021-44732 is a critical-severity vulnerability in Arm Mbed TLS, classified under Double Free. CVSS score: 9.8/10. Published 2021-12-20.
- How severe is CVE-2021-44732?
- Critical severity. CVSS v3 base score is 9.8 out of 10.