CVE-2025-52497

NameCVE-2025-52497
DescriptionMbed 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-4274-1
Debian Bugs1108786

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
mbedtls (PTS)bullseye2.16.9-0.1vulnerable
bullseye (security)2.16.9-0.1+deb11u3fixed
bookworm2.28.3-1vulnerable
forky, sid, trixie3.6.4-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
mbedtlssourcebullseye2.16.9-0.1+deb11u2DLA-4274-1
mbedtlssource(unstable)3.6.4-11108786

Notes

https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-2.md
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