Skip to content
Fencer Intel
medium 5.4

CVE-2025-27810 json

Mbed TLS before 2.28.10 and 3.x before 3.6.3, in some cases of failed memory allocation or hardware...

published last yr. modified 3mo ago also EUVD-2025-14831 , JLSEC-2025-187

cvss
5.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits
0
none known

Summary

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.

Patch / fix

  • julia MbedTLS_jll 2.28.10+0
  • Mbed mbedtls 2.28.10, 3.6.3
  • mbedtls Debian 14, Debian 13 3.6.3-1

debian advisories DEBIAN-CVE-2025-27810

  • mbedtls Ubuntu Pro 18.04 LTS 2.8.0-1ubuntu0.1~esm1
  • mbedtls Ubuntu Pro 20.04 LTS 2.16.4-1ubuntu2+esm1
  • mbedtls Ubuntu Pro 22.04 LTS 2.28.0-1ubuntu0.1~esm1
  • mbedtls Ubuntu Pro 24.04 LTS 2.28.8-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2025-27810

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • mbedtls openSUSE Leap 16.0 3.6.6-bp160.1.1
  • mbedtls-2 openSUSE Leap 16.0 2.28.10-bp160.1.1
  • mbedtls-2 openSUSE Tumbleweed 2.28.10-1.1

opensuse advisories openSUSE-SU-2026:21144-1openSUSE-SU-2026:21145-1openSUSE-SU-2025:14928-1

  • mbedtls Alpine 3.19, Alpine 3.18 2.28.10-r0
  • mbedtls Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 3.6.3-r0
  • mbedtls2 Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 2.28.10-r0
  • mbedtls3 Alpine 3.24 3.6.3-r0

alpine advisories ALPINE-CVE-2025-27810

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2025-27810 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
NVD 3.1 4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
OSV 3.1 4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
julia MbedTLS_jll
<2.28.10+0
2.28.10+0

Affected products

  • Mbed mbedtls

Classification

Weakness
  • CWE-908 Use of Uninitialized Resource

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.