Description
ARM mbed TLS before 1.3.22, before 2.1.10, and before 2.7.0, when the truncated HMAC extension and CBC are used, allows remote attackers to execute arbitrary code or cause a denial of service (heap corruption) via a crafted application packet within a TLS or DTLS session.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | ARM mbed TLS before 1.3.22, before 2.1.10, and before 2.7.0 | ARM mbed TLS before 1.3.22, before 2.1.10, and before 2.7.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mbedtls | 2.7.0-2 | — |
| Debian 13 | mbedtls | 2.7.0-2 | — |
| Debian 12 | mbedtls | 2.7.0-2 | — |
| Debian 9 | mbedtls | 2.4.2-1+deb9u2 | DSA-4138-1 |
| Debian 8 | polarssl | 1.3.9-2.1+deb8u3 | DSA-4147-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | mbedtls | 2.2.1-2ubuntu0.3 | USN-4267-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 12 | mbedtls | 1.3.19-11.1 | openSUSE-SU-2018:0491-1, openSUSE-SU-2018:0488-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | mbedtls-2 | 2.27.0-1.2 | openSUSE-SU-2024:11043-1 |
| openSUSE Tumbleweed | mbedtls-3 | 3.6.6-1.1 | openSUSE-SU-2026:11119-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | mbedtls +2 | 2.7.0-r0 | — |
| Alpine v3.23 | mbedtls +1 | 2.7.0-r0 | — |
| Alpine v3.22 | mbedtls +1 | 2.7.0-r0 | — |
| Alpine v3.21 | mbedtls +1 | 2.7.0-r0 | — |
| Alpine v3.20 | mbedtls +1 | 2.7.0-r0 | — |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | mbedtls | 2.7.0-r0 | — |
| Alpine v3.18 | mbedtls | 2.7.0-r0 | — |
| Alpine v3.17 | mbedtls | 2.7.0-r0 | — |
| Alpine v3.16 | mbedtls | 2.7.0-r0 | — |
| Alpine v3.15 | mbedtls | 2.7.0-r0 | — |
| Alpine v3.14 | mbedtls | 2.7.0-r0 | — |
| Alpine v3.13 | mbedtls | 2.7.0-r0 | — |
| Alpine v3.12 | mbedtls | 2.7.0-r0 | — |
| Alpine v3.11 | mbedtls | 2.7.0-r0 | — |
| Alpine v3.10 | mbedtls | 2.7.0-r0 | — |
| Alpine v3.9 | mbedtls | 2.7.0-r0 | — |
| Alpine v3.8 | mbedtls | 2.7.0-r0 | — |
Advisories 7
- openSUSE-SU-2026:11119-1 libeverest-3.6.6-1.1 on GA media SUSE / openSUSE Security Updates · Jun 26, 2026
- USN-4267-1 mbedtls vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-4138-1 mbedtls - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4147-1 polarssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:11043-1 libmbedcrypto7-2.27.0-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2018:0488-1 Security update for mbedtls SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2018:0491-1 Security update for mbedtls SUSE / openSUSE Security Updates · May 7, 2025
References
- 103057 vdb-entry
- DSA-4147 vendor-advisory
- DSA-4138 vendor-advisory
- https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2018-01
- GLSA-201804-19 vendor-advisory
- USN-4267-1 vendor-advisory