Numeric Range Comparison Without Minimum Check Affecting php8.3-ffi-debuginfo package, versions <0:8.3.31-1.amzn2023.0.1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.02% (7th percentile)

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  • Snyk IDSNYK-AMZN2023-PHP83FFIDEBUGINFO-16884880
  • published27 May 2026
  • disclosed10 May 2026

Introduced: 10 May 2026

NewCVE-2026-7258  (opens in a new tab)
CWE-839  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 php8.3-ffi-debuginfo to version 0:8.3.31-1.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2026-1728.

NVD Description

Note: Versions mentioned in the description apply only to the upstream php8.3-ffi-debuginfo package and not the php8.3-ffi-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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, some functions, including urldecode(), pass signed char to ctype functions (like isxdigit()). On the systems with default signed char and optimized table-lookup ctype functions - such as NetBSD - this can lead to accessing array with negative offset, which can trigger a denial of service.

CVSS Base Scores

version 3.1