Bug 2468564 (CVE-2026-7259) - CVE-2026-7259 php: NULL pointer dereference in php_mb_check_encoding() via mb_ereg_search_init()
Summary: CVE-2026-7259 php: NULL pointer dereference in php_mb_check_encoding() via mb...
Keywords:
Status: NEW
Alias: CVE-2026-7259
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-10 05:01 UTC by OSIDB Bzimport
Modified: 2026-06-30 10:46 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:23388 0 None None None 2026-06-04 15:53:49 UTC
Red Hat Product Errata RHSA-2026:33449 0 None None None 2026-06-30 10:46:10 UTC

Description OSIDB Bzimport 2026-05-10 05:01:19 UTC 
In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, a mismatch between encoding lists in Oniguruma and mbfl leads to  a NULL pointer dereference, resulting in a segmentation fault and denial of service. The vulnerability is exploitable when user-controlled input can influence the encoding passed to mb_regex_encoding().
Comment 2 errata-xmlrpc 2026-06-04 15:53:48 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:23388 https://access.redhat.com/errata/RHSA-2026:23388
Comment 3 errata-xmlrpc 2026-06-30 10:46:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:33449 https://access.redhat.com/errata/RHSA-2026:33449
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