Description
An exploitable free of a stack pointer vulnerability exists in the x509 certificate parsing code of ARM mbed TLS before 1.3.19, 2.x before 2.1.7, and 2.4.x before 2.4.2. A specially crafted x509 certificate, when parsed by mbed TLS library, can cause an invalid free of a stack pointer leading to a potential remote code execution. In order to exploit this vulnerability, an attacker can act as either a client or a server on a network to deliver malicious x509 certificates to vulnerable applications.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ARM | mbed TLS | 2.4.0 | — |
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 | 2.4.2-1 | — |
| Debian 13 | mbedtls | 2.4.2-1 | — |
| Debian 12 | mbedtls | 2.4.2-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | mbedtls | 2.2.1-2ubuntu0.1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 12 | mbedtls | 1.3.19-5.1 | openSUSE-SU-2017:0792-1, openSUSE-SU-2017:0790-1 |
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 | 2.4.2-r0 | — |
| Alpine v3.23 | mbedtls +1 | 2.4.2-r0 | — |
| Alpine v3.22 | mbedtls +1 | 2.4.2-r0 | — |
| Alpine v3.21 | mbedtls +1 | 2.4.2-r0 | — |
| Alpine v3.20 | mbedtls +1 | 2.4.2-r0 | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | mbedtls | 2.4.2-r0 | — |
| Alpine v3.18 | mbedtls | 2.4.2-r0 | — |
| Alpine v3.17 | mbedtls | 2.4.2-r0 | — |
| Alpine v3.16 | mbedtls | 2.4.2-r0 | — |
| Alpine v3.15 | mbedtls | 2.4.2-r0 | — |
| Alpine v3.14 | mbedtls | 2.4.2-r0 | — |
| Alpine v3.13 | mbedtls | 2.4.2-r0 | — |
| Alpine v3.12 | mbedtls | 2.4.2-r0 | — |
| Alpine v3.11 | mbedtls | 2.4.2-r0 | — |
| Alpine v3.10 | mbedtls | 2.4.2-r0 | — |
| Alpine v3.9 | mbedtls | 2.4.2-r0 | — |
| Alpine v3.8 | mbedtls | 2.4.2-r0 | — |
| Alpine v3.7 | mbedtls | 2.4.2-r0 | — |
| Alpine v3.6 | mbedtls | 2.4.2-r0 | — |
| Alpine v3.5 | mbedtls | 2.4.2-r0 | — |
Advisories 4
- openSUSE-SU-2026:11119-1 libeverest-3.6.6-1.1 on GA media SUSE / openSUSE Security Updates · Jun 26, 2026
- openSUSE-SU-2024:11043-1 libmbedcrypto7-2.27.0-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2017:0792-1 Security update for mbedtls SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2017:0790-1 Security update for mbedtls SUSE / openSUSE Security Updates · Feb 4, 2026