CVE catalog
CVE-2025-27810
Mbed TLS vulnerabilities
- Severity
- Medium · CVSS 4.8
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.30% · Oct 25, 2026
Mbed TLS before 2.28.10 and 3.x before 3.6.3, in some cases of failed memory allocation or hardware errors, uses uninitialized stack memory to compose the TLS Finished message, potentially leading to authentication bypasses such as replays.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | mbedtls | sid | 3.6.7-3 | fixed |
| Debian | mbedtls | forky | 3.6.7-3 | fixed |
| Debian | mbedtls | trixie | 3.6.6-0.1~deb13u1 | fixed |
| Debian | mbedtls | bookworm | 2.28.3-1 | vulnerable |
| Ubuntu | mbedtls | noble | Not reported | vulnerable |
| Ubuntu | mbedtls | noble | 2.28.8-1ubuntu0.1~esm1 | fixed |
| Ubuntu | libmbedcrypto7t64 | noble | 2.28.8-1ubuntu0.1~esm1 | fixed |
| Ubuntu | libmbedtls-dev | noble | 2.28.8-1ubuntu0.1~esm1 | fixed |
| Ubuntu | libmbedtls-doc | noble | 2.28.8-1ubuntu0.1~esm1 | fixed |
| Ubuntu | libmbedtls14t64 | noble | 2.28.8-1ubuntu0.1~esm1 | fixed |
| Ubuntu | libmbedx509-1t64 | noble | 2.28.8-1ubuntu0.1~esm1 | fixed |
| Alpine | mbedtls | 3.18 | 2.28.10-r0 | fixed |
| Alpine | mbedtls | 3.19 | 2.28.10-r0 | fixed |
| Alpine | mbedtls | 3.20 | 3.6.3-r0 | fixed |
| Alpine | mbedtls | 3.21 | 3.6.3-r0 | fixed |
| Alpine | mbedtls | 3.22 | 3.6.3-r0 | fixed |
| Alpine | mbedtls | 3.23 | 3.6.3-r0 | fixed |
| Alpine | mbedtls | 3.24 | 3.6.3-r0 | fixed |
| Ubuntu | mbedtls | 16.04 | 2.1.2-1 | vulnerable |
| Ubuntu | mbedtls | 16.04 | 2.2.0-1 | vulnerable |
| Ubuntu | mbedtls | 16.04 | 2.2.1-1 | vulnerable |
| Ubuntu | mbedtls | 16.04 | 2.2.1-2 | vulnerable |
| Ubuntu | mbedtls | 16.04 | 2.2.1-2ubuntu0.1 | vulnerable |
| Ubuntu | mbedtls | 16.04 | 2.2.1-2ubuntu0.2 | vulnerable |
| Ubuntu | mbedtls | 16.04 | 2.2.1-2ubuntu0.3 | vulnerable |
| Ubuntu | mbedtls | pro | 2.28.3-1 | vulnerable |
| Ubuntu | mbedtls | pro | 2.28.6-1ubuntu1 | vulnerable |
| Ubuntu | mbedtls | pro | 2.28.7-1ubuntu1 | vulnerable |
| Ubuntu | mbedtls | pro | 2.28.7-1.1ubuntu1 | vulnerable |
| Ubuntu | mbedtls | pro | 2.28.8-1 | vulnerable |
| Ubuntu | mbedtls | pro | 2.28.8-1ubuntu0.1~esm1 | fixed |
| Ubuntu | mbedtls | 25.10 | 3.6.2-3ubuntu1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | mbedtls | source | sid | 3.6.3-1 | not yet assigned | Not reported | [1101499] |
| Debian | mbedtls | source | forky | 3.6.3-1 | not yet assigned | Not reported | [1101499] |
| Debian | mbedtls | source | trixie | 3.6.3-1 | not yet assigned | Not reported | [1101499] |
| Debian | mbedtls | source | bookworm | (unfixed) | not yet assigned | Not reported | [1101499] |
| Ubuntu | mbedtls | deb | noble | 2.28.8-1ubuntu0.1~esm1 | Not reported | Not reported | Not reported |
| Ubuntu | libmbedcrypto7t64 | deb | noble | 2.28.8-1ubuntu0.1~esm1 | Not reported | Not reported | Not reported |
| Ubuntu | libmbedtls-dev | deb | noble | 2.28.8-1ubuntu0.1~esm1 | Not reported | Not reported | Not reported |
| Ubuntu | libmbedtls-doc | deb | noble | 2.28.8-1ubuntu0.1~esm1 | Not reported | Not reported | Not reported |
| Ubuntu | libmbedtls14t64 | deb | noble | 2.28.8-1ubuntu0.1~esm1 | Not reported | Not reported | Not reported |
| Ubuntu | libmbedx509-1t64 | deb | noble | 2.28.8-1ubuntu0.1~esm1 | Not reported | Not reported | Not reported |
| Alpine | mbedtls | apk | 3.18 | 2.28.10-r0 | Not reported | ALPINE-CVE-2025-27810 | Not reported |
| Alpine | mbedtls | apk | 3.19 | 2.28.10-r0 | Not reported | ALPINE-CVE-2025-27810 | Not reported |
| Alpine | mbedtls | apk | 3.20 | 3.6.3-r0 | Not reported | ALPINE-CVE-2025-27810 | Not reported |
| Alpine | mbedtls | apk | 3.21 | 3.6.3-r0 | Not reported | ALPINE-CVE-2025-27810 | Not reported |
| Alpine | mbedtls | apk | 3.22 | 3.6.3-r0 | Not reported | ALPINE-CVE-2025-27810 | Not reported |
| Alpine | mbedtls | apk | 3.23 | 3.6.3-r0 | Not reported | ALPINE-CVE-2025-27810 | Not reported |
| Alpine | mbedtls | apk | 3.24 | 3.6.3-r0 | Not reported | ALPINE-CVE-2025-27810 | Not reported |
| Ubuntu | mbedtls | deb | pro | 2.28.8-1ubuntu0.1~esm1 | Not reported | UBUNTU-CVE-2025-27810 | Not reported |
Notes
[bookworm] mbedtls: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libmbedcrypto7]Affected
Source package: [mbedtls]
Details (2)
2.28.3-1· amd64 · bookwormAffected
usn · mbedtls · debian · bookworm; usn · mbedtls · debian · 12
2.28.3-1· arm64 · bookwormAffected
usn · mbedtls · debian · bookworm; usn · mbedtls · debian · 12
- [libmbedtls14]Affected
Source package: [mbedtls]
Details (2)
2.28.3-1· amd64 · bookwormAffected
usn · mbedtls · debian · bookworm; usn · mbedtls · debian · 12
2.28.3-1· arm64 · bookwormAffected
usn · mbedtls · debian · bookworm; usn · mbedtls · debian · 12
- [libmbedtls-dev]Affected
Source package: [mbedtls]
Details (2)
2.28.3-1· amd64 · bookwormAffected
usn · mbedtls · debian · bookworm; usn · mbedtls · debian · 12
2.28.3-1· arm64 · bookwormAffected
usn · mbedtls · debian · bookworm; usn · mbedtls · debian · 12
- [libmbedtls-doc]Affected
Source package: [mbedtls]
Details (2)
2.28.3-1· all · bookwormAffected
usn · mbedtls · debian · bookworm; usn · mbedtls · debian · 12
2.28.3-1· all · bookwormAffected
usn · mbedtls · debian · bookworm; usn · mbedtls · debian · 12
- [libmbedx509-1]Affected
Source package: [mbedtls]
Details (2)
2.28.3-1· amd64 · bookwormAffected
usn · mbedtls · debian · bookworm; usn · mbedtls · debian · 12
2.28.3-1· arm64 · bookwormAffected
usn · mbedtls · debian · bookworm; usn · mbedtls · debian · 12
[Debian 13 (Trixie)]
- [libmbedcrypto16]Fixed
Source package: [mbedtls]
Details (2)
3.6.5-0.1~deb13u1· amd64 · trixieFixed · Fixed:
3.6.3-1usn · mbedtls · debian · 13
3.6.5-0.1~deb13u1· arm64 · trixieFixed · Fixed:
3.6.3-1usn · mbedtls · debian · 13
- [libmbedtls21]Fixed
Source package: [mbedtls]
Details (2)
3.6.5-0.1~deb13u1· amd64 · trixieFixed · Fixed:
3.6.3-1usn · mbedtls · debian · 13
3.6.5-0.1~deb13u1· arm64 · trixieFixed · Fixed:
3.6.3-1usn · mbedtls · debian · 13
- [libmbedtls-dev]Fixed
Source package: [mbedtls]
Details (2)
3.6.5-0.1~deb13u1· amd64 · trixieFixed · Fixed:
3.6.3-1usn · mbedtls · debian · 13
3.6.5-0.1~deb13u1· arm64 · trixieFixed · Fixed:
3.6.3-1usn · mbedtls · debian · 13
- [libmbedtls-doc]Fixed
Source package: [mbedtls]
Details (2)
3.6.5-0.1~deb13u1· all · trixieFixed · Fixed:
3.6.3-1usn · mbedtls · debian · 13
3.6.5-0.1~deb13u1· all · trixieFixed · Fixed:
3.6.3-1usn · mbedtls · debian · 13
- [libmbedx509-7]Fixed
Source package: [mbedtls]
Details (2)
3.6.5-0.1~deb13u1· amd64 · trixieFixed · Fixed:
3.6.3-1usn · mbedtls · debian · 13
3.6.5-0.1~deb13u1· arm64 · trixieFixed · Fixed:
3.6.3-1usn · mbedtls · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2025_14928-1.json]
- [https://osv.dev/vulnerability/ALPINE-CVE-2025-27810]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2025-27810]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2025-27810]
- [https://security-tracker.debian.org/tracker/CVE-2025-27810]
- [https://ubuntu.com/security/notices/USN-8123-1]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]