BIT-libphp-2026-17544

vendorUSosv

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

view advisory published 2026-08-17Licence: per source

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-17544US	critical9.8	0.42% (36th)	Exploit	2026-07-30
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

External citations — patches, advisories, analysis.

https://github.com/php/php-src/security/advisories/GHSA-x692-q9x7-8c3fADVISORY
https://nvd.nist.gov/vuln/detail/CVE-2026-17544WEB

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