CVE-2025-52497
mbedtls: Mbed TLS before 3.6.4 has a PEM parsing one-byte heap-based buffer underflow, in mbedtls_pem_read_buffer and two mbed...
CVE-2025-52497 is fixed in 12 products on 1 platform, first by DEBIAN-CVE-2025-52497, released July 4, 2025. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
4.8
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0033
26th percentile
Mbed TLS before 3.6.4 has a PEM parsing one-byte heap-based buffer underflow, in mbedtls_pem_read_buffer and two mbedtls_pk_parse functions, via untrusted PEM input.
Where it's fixed
| 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 | Jul 20, 2025 |
| libmbedcrypto3 · Ubuntu 20.04 LTS (focal) | 2.16.4-1ubuntu2+esm1 | libmbedcrypto3 2.16.4-1ubuntu2+esm1 | Jul 20, 2025 |
| libmbedcrypto7 · Ubuntu 22.04.1 LTS (jammy) | 2.28.0-1ubuntu0.1~esm1 | libmbedcrypto7 2.28.0-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedcrypto7t64 · Ubuntu 24.04.5 LTS (noble) | 2.28.8-1ubuntu0.1~esm1 | libmbedcrypto7t64 2.28.8-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedtls10 · Ubuntu 18.04.6 LTS (bionic) | 2.8.0-1ubuntu0.1~esm1 | libmbedtls10 2.8.0-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedtls12 · Ubuntu 20.04 LTS (focal) | 2.16.4-1ubuntu2+esm1 | libmbedtls12 2.16.4-1ubuntu2+esm1 | Jul 20, 2025 |
| libmbedtls14 · Ubuntu 22.04.1 LTS (jammy) | 2.28.0-1ubuntu0.1~esm1 | libmbedtls14 2.28.0-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedtls14t64 · Ubuntu 24.04.5 LTS (noble) | 2.28.8-1ubuntu0.1~esm1 | libmbedtls14t64 2.28.8-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedx509-0 · Ubuntu 18.04.6 LTS (bionic) | 2.8.0-1ubuntu0.1~esm1 | libmbedx509-0 2.8.0-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedx509-0 · Ubuntu 20.04 LTS (focal) | 2.16.4-1ubuntu2+esm1 | libmbedx509-0 2.16.4-1ubuntu2+esm1 | Jul 20, 2025 |
| libmbedx509-1 · Ubuntu 22.04.1 LTS (jammy) | 2.28.0-1ubuntu0.1~esm1 | libmbedx509-1 2.28.0-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedx509-1t64 · Ubuntu 24.04.5 LTS (noble) | 2.28.8-1ubuntu0.1~esm1 | libmbedx509-1t64 2.28.8-1ubuntu0.1~esm1 | Jul 20, 2025 |
| mbedtls · Debian 13.5 (trixie) | 3.6.4-1 | DEBIAN-CVE-2025-52497 | Jul 4, 2025 |
| mbedtls · Debian 14 | 3.6.4-1 | DEBIAN-CVE-2025-52497 | Jul 4, 2025 |
| mbedtls · opensuse-leap 16.0 | 3.6.6-bp160.1.1 | OPENSUSE-SU-2026:21144-1 | Jun 22, 2026 |
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