Use-After-Free and TOCTOU in Apache Traffic Server

Publication date: 2026-07-29

Last updated on: 2026-07-29

Assigner: Apache Software Foundation

Description

Apache Traffic Server has use-after-free and time-of-check/time-of-use errors in remap configuration handling. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-29

Last Modified

2026-07-29

Generated

2026-07-30

AI Q&A

2026-07-30

EPSS Evaluated

N/A

NVD

CVE-2026-58164

Affected Vendors & Products

Vendor	Product	Version / Range
apache	traffic_server	From 8.0.0 (inc) to 8.1.9 (inc)
apache	traffic_server	From 9.0.0 (inc) to 9.2.14 (inc)
apache	traffic_server	9.2.15
apache	traffic_server	10.1.4

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

Apache Traffic Server has a vulnerability involving use-after-free and time-of-check/time-of-use errors in its remap configuration handling. This means the software may improperly access memory after it has been freed or incorrectly validate conditions before use, potentially leading to crashes or unintended behavior.

Impact Analysis

This vulnerability could allow an attacker to cause a denial-of-service condition or execute arbitrary code on the affected system. It may lead to server crashes, data corruption, or unauthorized access if exploited.

Mitigation Strategies

Upgrade Apache Traffic Server to version 9.2.15 or 10.1.4, which contain fixes for the use-after-free and time-of-check/time-of-use errors.

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