VulnerabilityModified
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.
CRITICAL 9.8EPSS 2.58%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.58%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.58% probability · 84th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-415
- Affected
- arm/mbed tls · trustedfirmware/mbed tls · debian/debian linux
- Source
- cve@mitre.org
References
- https://bugs.gentoo.org/829660Issue Tracking, Mailing List, Third Party Advisory
- https://github.com/ARMmbed/mbedtls/releasesRelease Notes
- https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.12Release Notes
- https://github.com/ARMmbed/mbedtls/releases/tag/v2.28.0Release Notes
- https://github.com/ARMmbed/mbedtls/releases/tag/v3.1.0Release Notes
- https://lists.debian.org/debian-lts-announce/2022/12/msg00036.htmlMailing List, Third Party Advisory
- https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-12Exploit, Mitigation, Third Party Advisory
- https://bugs.gentoo.org/829660Issue Tracking, Mailing List, Third Party Advisory
- https://github.com/ARMmbed/mbedtls/releasesRelease Notes
- https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.12Release Notes
- https://github.com/ARMmbed/mbedtls/releases/tag/v2.28.0Release Notes
- https://github.com/ARMmbed/mbedtls/releases/tag/v3.1.0Release Notes
- https://lists.debian.org/debian-lts-announce/2022/12/msg00036.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/06/msg00034.html
- https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-12Exploit, Mitigation, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.