CVE-2026-17544

HIGH

Out-of-bounds write in bccomp() via crafted operand and scale

Title source: cna
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v4 8.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-787
Status published
Products (2)
PHP Group/PHP 8.4.* - 8.4.24
PHP Group/PHP 8.5.* - 8.5.9
Published Jul 30, 2026
Tracked Since Jul 30, 2026