Upstream information

CVE-2025-49600 at MITRE

Description

In MbedTLS 3.3.0 before 3.6.4, mbedtls_lms_verify may accept invalid signatures if hash computation fails and internal errors go unchecked, enabling LMS (Leighton-Micali Signature) forgery in a fault scenario. Specifically, unchecked return values in mbedtls_lms_verify allow an attacker (who can induce a hardware hash accelerator fault) to bypass LMS signature verification by reusing stale stack data, resulting in acceptance of an invalid signature. In mbedtls_lms_verify, the return values of the internal Merkle tree functions create_merkle_leaf_value and create_merkle_internal_value are not checked. These functions return an integer that indicates whether the call succeeded or not. If a failure occurs, the output buffer (Tc_candidate_root_node) may remain uninitialized, and the result of the signature verification is unpredictable. When the software implementation of SHA-256 is used, these functions will not fail. However, with hardware-accelerated hashing, an attacker could use fault injection against the accelerator to bypass verification.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v3 Scores
CVSS detail CNA (MITRE)
Base Score 4.9
Vector CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
Attack Vector Physical
Attack Complexity High
Privileges Required None
User Interaction None
Scope Changed
Confidentiality Impact None
Integrity Impact High
Availability Impact None
CVSSv3 Version 3.1
SUSE Bugzilla entry: 1245808 [NEW]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
SUSE Package Hub 15 SP7
  • libeverest >= 3.6.6-bp157.2.3.1
  • libeverest-32bit >= 3.6.6-bp157.2.3.1
  • libeverest-64bit >= 3.6.6-bp157.2.3.1
  • libmbedcrypto16 >= 3.6.6-bp157.2.3.1
  • libmbedcrypto16-32bit >= 3.6.6-bp157.2.3.1
  • libmbedcrypto16-64bit >= 3.6.6-bp157.2.3.1
  • libmbedtls21 >= 3.6.6-bp157.2.3.1
  • libmbedtls21-32bit >= 3.6.6-bp157.2.3.1
  • libmbedtls21-64bit >= 3.6.6-bp157.2.3.1
  • libmbedx509-7 >= 3.6.6-bp157.2.3.1
  • libmbedx509-7-32bit >= 3.6.6-bp157.2.3.1
  • libmbedx509-7-64bit >= 3.6.6-bp157.2.3.1
  • libp256m >= 3.6.6-bp157.2.3.1
  • libp256m-32bit >= 3.6.6-bp157.2.3.1
  • libp256m-64bit >= 3.6.6-bp157.2.3.1
  • mbedtls-devel >= 3.6.6-bp157.2.3.1
 Patchnames:
openSUSE-2026-214
openSUSE Leap 16.0
  • libeverest >= 3.6.6-bp160.1.1
  • libeverest-x86-64-v3 >= 3.6.6-bp160.1.1
  • libmbedcrypto16 >= 3.6.6-bp160.1.1
  • libmbedcrypto16-x86-64-v3 >= 3.6.6-bp160.1.1
  • libmbedtls21 >= 3.6.6-bp160.1.1
  • libmbedtls21-x86-64-v3 >= 3.6.6-bp160.1.1
  • libmbedx509-7 >= 3.6.6-bp160.1.1
  • libmbedx509-7-x86-64-v3 >= 3.6.6-bp160.1.1
  • libp256m >= 3.6.6-bp160.1.1
  • libp256m-x86-64-v3 >= 3.6.6-bp160.1.1
  • mbedtls-devel >= 3.6.6-bp160.1.1
 Patchnames:
openSUSE-Leap-16.0-packagehub-339

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Package Hub 15 SP7 mbedtls Released

SUSE Timeline for this CVE

CVE page created: Fri Jul 4 18:00:55 2025
CVE page last modified: Tue Jun 30 12:23:49 2026