Description
The strncasecmp function in the GNU C Library 2.24 and later optimized for the Power8 architecture may read one byte beyond the input size limit, which may crash a program when that byte is not readable.

This condition may happen when the input strings to the strncasecmp function are attacker controlled in an application and they match all the way up to the edge of their page and the neighbouring page is either not mapped or is not readable.
Published: 2026-09-28
Score: 3.7 Low
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
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Remediation

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History

Mon, 28 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 28 Sep 2026 17:15:00 +0000

Type Values Removed Values Added
First Time appeared The Gnu C Library
The Gnu C Library glibc
Vendors & Products The Gnu C Library
The Gnu C Library glibc

Mon, 28 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Description The strncasecmp function in the GNU C Library 2.24 and later optimized for the Power8 architecture may read one byte beyond the input size limit, which may crash a program when that byte is not readable. This condition may happen when the input strings to the strncasecmp function are attacker controlled in an application and they match all the way up to the edge of their page and the neighbouring page is either not mapped or is not readable.
Title One-byte overread in strncasecmp on Power8
Weaknesses CWE-126
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}


Subscriptions

The Gnu C Library Glibc
cve-icon MITRE

Status: PUBLISHED

Assigner: glibc

Published:

Updated: 2026-09-28T17:07:36.744Z

Reserved: 2026-09-24T14:30:14.230Z

Link: CVE-2026-97399

cve-icon Vulnrichment

Updated: 2026-09-28T16:22:12.843Z

cve-icon NVD

Status : Received

Published: 2026-09-28T16:17:18.550

Modified: 2026-09-28T17:17:53.643

Link: CVE-2026-97399

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-28T17:00:05Z

Weaknesses