2509256 – (CVE-2026-17544) CVE-2026-17544 php: PHP: Arbitrary code execution via out-of-bounds write in bccomp()

Bug 2509256 (CVE-2026-17544) - CVE-2026-17544 php: PHP: Arbitrary code execution via out-of-bounds write in bccomp()

Summary: CVE-2026-17544 php: PHP: Arbitrary code execution via out-of-bounds write in ...

Keywords:
Status:	NEW
Alias:	CVE-2026-17544
Product:	Security Response
Classification:	Other
Component:	vulnerability
Sub Component:
Version:	unspecified
Hardware:	All
OS:	Linux
Priority:	high
Severity:	high
Target Milestone:	---
Assignee:	Product Security
QA Contact:
Docs Contact:
URL:
Whiteboard:
Depends On:	2511423
Blocks:
TreeView+	depends on / blocked

Reported:	2026-07-30 12:01 UTC by OSIDB Bzimport
Modified:	2026-08-19 14:18 UTC (History)
CC List:	3 users (show)
Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments	(Terms of Use)

Links
System	ID	Private	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2026:56969	0	None	None	None	2026-08-19 14:18:07 UTC

Description OSIDB Bzimport 2026-07-30 12:01:12 UTC

Attacker-provided inputs to bccomp() could lead to an out-of-bounds write with stack and heap corruption in PHP versions from 8.4.* before 8.4.24 and from 8.5.* before 8.5.9.

Comment 1 Remi Collet 2026-07-31 12:31:13 UTC

Notice: Versions < 8.4 are not affected

Comment 3 errata-xmlrpc 2026-08-19 14:18:06 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:56969 https://access.redhat.com/errata/RHSA-2026:56969

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