SB20261110277 - Use of uninitialized resource in wire

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Main Vulnerability Database SB20261110277

SB20261110277 - Use of uninitialized resource in wire

Published: November 10, 2026

Security Bulletin ID SB20261110277
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use of uninitialized resource (CVE-ID: N/A)

CWE-ID: CWE-908 - Use of Uninitialized Resource

CVSSv4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to crash the decoding process and potentially corrupt previously decoded, retained data.

The vulnerability exists due to use of uninitialized memory in Wire's Swift ProtoReader when a nested-message bounds check throws after the frame index advances but before initialization, causing cleanup to access an uninitialized frame. A remote attacker can supply protobuf bytes containing a truncated nested message to trigger a process crash even if decoding errors are caught, with retained-data corruption dependent on the allocator, schema, and application lifecycle.


Remediation

Install update from vendor's website.

References