| Name | CVE-2025-49087 |
| Description | In Mbed TLS 3.6.1 through 3.6.3 before 3.6.4, a timing discrepancy in block cipher padding removal allows an attacker to recover the plaintext when PKCS#7 padding mode is used. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1108789 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| mbedtls (PTS) | bullseye | 2.16.9-0.1 | fixed |
| bullseye (security) | 2.16.9-0.1+deb11u3 | fixed |
| bookworm | 2.28.3-1 | fixed |
| forky, sid, trixie | 3.6.4-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| mbedtls | source | bullseye | (not affected) | | | |
| mbedtls | source | bookworm | (not affected) | | | |
| mbedtls | source | (unstable) | 3.6.4-1 | | | 1108789 |
Notes
[bookworm] - mbedtls <not-affected> (Vulnerable code not present)
[bullseye] - mbedtls <not-affected> (Vulnerable code not present)
https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-5.md