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Vulnerability record · CVE-2023-0568 · published 16 February 2023

CVE-2023-0568: Php allocation without limits vulnerability

Php · Php

In PHP 8.0.X before 8.0.28, 8.1.X before 8.1.16 and 8.2.X before 8.2.3, core path resolution function allocate buffer one byte too small. When resolving paths with lengths close to system MAXPATHLEN setting, this may lead to the byte after the allocated buffer being overwritten with NUL value, which might lead to unauthorized data access or modification.

8.1 CVSS 3.1 High EPSS 1.2% · top 32.0% CWE-131 · CWE-131CWE-770 · Allocation without limits
8.1CVSS 3.1 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

In PHP 8.0.X before 8.0.28, 8.1.X before 8.1.16 and 8.2.X before 8.2.3, core path resolution function allocate buffer one byte too small. When resolving paths with lengths close to system MAXPATHLEN setting, this may lead to the byte after the allocated buffer being overwritten with NUL value, which might lead to unauthorized data access or modification.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugs.php.net/bug.php?id=81746 ExploitIssue TrackingPatchVendor Advisory
https://security.netapp.com/advisory/ntap-20230517-0001/
https://bugs.php.net/bug.php?id=81746 ExploitIssue TrackingPatchVendor Advisory
https://security.netapp.com/advisory/ntap-20230517-0001/

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-0568), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.