Calling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow.
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Affected Vendors & Products
References
History
Thu, 23 Apr 2026 15:45:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Gnu
Gnu glibc |
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| Weaknesses | CWE-787 | |
| CPEs | cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Gnu
Gnu glibc |
Wed, 22 Apr 2026 12:15:00 +0000
| Type | Values Removed | Values Added |
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| Weaknesses | CWE-131 | |
| References |
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threat_severity
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threat_severity
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Wed, 22 Apr 2026 00:00:00 +0000
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cvssV3_1
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Mon, 20 Apr 2026 23:15:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
The Gnu C Library
The Gnu C Library glibc |
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| Vendors & Products |
The Gnu C Library
The Gnu C Library glibc |
Mon, 20 Apr 2026 21:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Calling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow. | |
| Title | scanf %mc off-by-one heap buffer overflow | |
| Weaknesses | CWE-122 | |
| References |
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Status: PUBLISHED
Assigner: glibc
Published: 2026-04-20T20:55:41.170Z
Updated: 2026-04-21T19:49:53.221Z
Reserved: 2026-04-02T21:47:21.403Z
Link: CVE-2026-5450
Updated: 2026-04-21T16:04:17.997Z
Status : Analyzed
Published: 2026-04-20T21:16:36.850
Modified: 2026-04-23T15:33:34.277
Link: CVE-2026-5450