# CVE-2025-48965: libmbedx509-1t64: Mbed TLS before 3.6.4 has a NULL pointer dereference because mbedtls_asn1_store_named_data can trigger conflicting da...

CVE-2025-48965 is fixed in 12 products on 1 platform, first by libmbedcrypto1 2.8.0-1ubuntu0.1~esm1, released July 20, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-48965
- Priority: High
- CVSS: 7.5 (Medium)
- EPSS: 0.0057
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 20, 2025

## Description

Mbed TLS before 3.6.4 has a NULL pointer dereference because mbedtls_asn1_store_named_data can trigger conflicting data with val.p of NULL but val.len greater than zero.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libmbedcrypto1 Ubuntu 18.04.6 LTS (bionic) | 2.8.0-1ubuntu0.1~esm1 | [libmbedcrypto1 2.8.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmbedcrypto1-2.8.0-1ubuntu0.1-esm1.md) | Jul 20, 2025 |
| Linux | libmbedcrypto3 Ubuntu 20.04 LTS (focal) | 2.16.4-1ubuntu2+esm1 | [libmbedcrypto3 2.16.4-1ubuntu2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmbedcrypto3-2.16.4-1ubuntu2-esm1.md) | Jul 20, 2025 |
| Linux | libmbedcrypto7 Ubuntu 22.04.1 LTS (jammy) | 2.28.0-1ubuntu0.1~esm1 | [libmbedcrypto7 2.28.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libmbedcrypto7-2.28.0-1ubuntu0.1-esm1.md) | Jul 20, 2025 |
| Linux | libmbedcrypto7t64 Ubuntu 24.04.5 LTS (noble) | 2.28.8-1ubuntu0.1~esm1 | [libmbedcrypto7t64 2.28.8-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libmbedcrypto7t64-2.28.8-1ubuntu0.1-esm1.md) | Jul 20, 2025 |
| Linux | libmbedtls10 Ubuntu 18.04.6 LTS (bionic) | 2.8.0-1ubuntu0.1~esm1 | [libmbedtls10 2.8.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmbedtls10-2.8.0-1ubuntu0.1-esm1.md) | Jul 20, 2025 |
| Linux | libmbedtls12 Ubuntu 20.04 LTS (focal) | 2.16.4-1ubuntu2+esm1 | [libmbedtls12 2.16.4-1ubuntu2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmbedtls12-2.16.4-1ubuntu2-esm1.md) | Jul 20, 2025 |
| Linux | libmbedtls14 Ubuntu 22.04.1 LTS (jammy) | 2.28.0-1ubuntu0.1~esm1 | [libmbedtls14 2.28.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libmbedtls14-2.28.0-1ubuntu0.1-esm1.md) | Jul 20, 2025 |
| Linux | libmbedtls14t64 Ubuntu 24.04.5 LTS (noble) | 2.28.8-1ubuntu0.1~esm1 | [libmbedtls14t64 2.28.8-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libmbedtls14t64-2.28.8-1ubuntu0.1-esm1.md) | Jul 20, 2025 |
| Linux | libmbedx509-0 Ubuntu 18.04.6 LTS (bionic) | 2.8.0-1ubuntu0.1~esm1 | [libmbedx509-0 2.8.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmbedx509-0-2.8.0-1ubuntu0.1-esm1.md) | Jul 20, 2025 |
| Linux | libmbedx509-0 Ubuntu 20.04 LTS (focal) | 2.16.4-1ubuntu2+esm1 | [libmbedx509-0 2.16.4-1ubuntu2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmbedx509-0-2.16.4-1ubuntu2-esm1.md) | Jul 20, 2025 |
| Linux | libmbedx509-1 Ubuntu 22.04.1 LTS (jammy) | 2.28.0-1ubuntu0.1~esm1 | [libmbedx509-1 2.28.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libmbedx509-1-2.28.0-1ubuntu0.1-esm1.md) | Jul 20, 2025 |
| Linux | libmbedx509-1t64 Ubuntu 24.04.5 LTS (noble) | 2.28.8-1ubuntu0.1~esm1 | [libmbedx509-1t64 2.28.8-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libmbedx509-1t64-2.28.8-1ubuntu0.1-esm1.md) | Jul 20, 2025 |
| Linux | mbedtls Debian 13.5 (trixie) | 3.6.4-1 | [DEBIAN-CVE-2025-48965](https://patchblox.com/security/data/fix/linux/debian-cve-2025-48965.md) | Jul 20, 2025 |
| Linux | mbedtls Debian 14 | 3.6.4-1 | [DEBIAN-CVE-2025-48965](https://patchblox.com/security/data/fix/linux/debian-cve-2025-48965.md) | Jul 20, 2025 |
| Linux | mbedtls opensuse-leap 16.0 | 3.6.6-bp160.1.1 | [OPENSUSE-SU-2026:21144-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21144-1.md) | Jun 22, 2026 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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