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.
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Affected Vendors & Products
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History
Tue, 29 Sep 2026 13:15:00 +0000
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| Weaknesses | CWE-125 | |
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threat_severity
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Mon, 28 Sep 2026 18:30:00 +0000
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Mon, 28 Sep 2026 17:30:00 +0000
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Mon, 28 Sep 2026 17:15:00 +0000
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The Gnu C Library
The Gnu C Library glibc |
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The Gnu C Library
The Gnu C Library glibc |
Mon, 28 Sep 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
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| 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 |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: glibc
Published: 2026-09-28T15:21:02.090Z
Updated: 2026-09-28T17:07:36.744Z
Reserved: 2026-09-24T14:30:14.230Z
Link: CVE-2026-97399
Updated: 2026-09-28T17:07:36.744Z
Status : Awaiting Analysis
Published: 2026-09-28T16:17:18.550
Modified: 2026-09-29T21:36:39.547
Link: CVE-2026-97399