fix(libsixel): fix CVE-2026 security vulnerabilities#6
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Jun 10, 2026
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Backport six CVE-2026 fixes from upstream saitoha/libsixel: - CVE-2026-33023: Integer overflow in DCS parameter scaling - CVE-2026-33020: Parser cursor overflow in SIXEL decoder - CVE-2026-33018: Null pointer dereference in palette allocation - CVE-2026-33021: Integer overflow in highcolor encoder - CVE-2026-44636: Integer overflows in encoder and quantizer - CVE-2026-44637: Bad-free in libpng and improper frame lifecycle Log: Fix six CVE-2026 vulnerabilities in libsixel Influence: 1. Test libsixel decoding with crafted SIXEL/PNG/GIF input 2. Verify no segmentation faults with malformed images 3. Check palette allocation null pointer handling 4. Validate DCS parameter scaling integer overflow prevention 5. Verify encoder delay calculation with large values fix(libsixel): 修复 CVE-2026 安全漏洞 从上游 saitoha/libsixel 回溯六个 CVE-2026 修复： - CVE-2026-33023: DCS 参数缩放整数溢出 - CVE-2026-33020: SIXEL 解码器光标溢出 - CVE-2026-33018: 调色板空指针解引用 - CVE-2026-33021: 高彩色编码器整数溢出 - CVE-2026-44636: 编码器和量化器整数溢出 - CVE-2026-44637: libpng 错误释放和帧生命周期问题 Log: 修复 libsixel 六个 CVE-2026 安全漏洞 Influence: 1. 测试使用恶意构造的 SIXEL/PNG/GIF 输入解码 2. 验证畸形图像不会导致段错误 3. 检查调色板分配空指针处理 4. 验证 DCS 参数缩放整数溢出防护 5. 验证编码器大值延时计算 repo: libsixel #master
…flow Backport fixes from upstream saitoha/libsixel for CVE-2026-33019: - GIF transparent color index heap buffer overflow: validate transparent index against palette bounds before palette write access - Encoder resize target integer overflow: use long long arithmetic with bounds clamping to prevent signed integer overflow Log: Fix CVE-2026-33019 in libsixel Influence: 1. Test libsixel GIF decoding with crafted transparent index values 2. Verify no heap-buffer-overflow with malformed GIF input 3. Test encoder resize with extreme dimension values 4. Validate integer overflow prevention in resize computation fix(libsixel): 修复 CVE-2026-33019 GIF 透明索引越界和调整大小溢出 从上游 saitoha/libsixel 回溯 CVE-2026-33019 修复： - GIF 透明颜色索引堆缓冲区溢出：在调色板写入前验证透明索引边界 - 编码器调整大小目标整数溢出：使用 long long 算术和边界限制防止溢出 Log: 修复 libsixel 的 CVE-2026-33019 漏洞 Influence: 1. 测试使用畸形透明索引值解码 GIF 2. 验证恶意 GIF 输入不会导致堆缓冲区溢出 3. 测试编码器使用极端尺寸值调整大小 4. 验证调整大小计算中的整数溢出防护 repo: libsixel #master
Backport six CVE-2026 fixes from upstream saitoha/libsixel: - CVE-2026-33023: Integer overflow in DCS parameter scaling - CVE-2026-33020: Parser cursor overflow in SIXEL decoder - CVE-2026-33018: Null pointer dereference in palette allocation - CVE-2026-33021: Integer overflow in highcolor encoder - CVE-2026-44636: Integer overflows in encoder and quantizer - CVE-2026-44637: Bad-free in libpng and improper frame lifecycle Log: Fix six CVE-2026 vulnerabilities in libsixel Influence: 1. Test libsixel decoding with crafted SIXEL/PNG/GIF input 2. Verify no segmentation faults with malformed images 3. Check palette allocation null pointer handling 4. Validate DCS parameter scaling integer overflow prevention 5. Verify encoder delay calculation with large values fix(libsixel): 修复 CVE-2026 安全漏洞 从上游 saitoha/libsixel 回溯六个 CVE-2026 修复： - CVE-2026-33023: DCS 参数缩放整数溢出 - CVE-2026-33020: SIXEL 解码器光标溢出 - CVE-2026-33018: 调色板空指针解引用 - CVE-2026-33021: 高彩色编码器整数溢出 - CVE-2026-44636: 编码器和量化器整数溢出 - CVE-2026-44637: libpng 错误释放和帧生命周期问题 Log: 修复 libsixel 六个 CVE-2026 安全漏洞 Influence: 1. 测试使用恶意构造的 SIXEL/PNG/GIF 输入解码 2. 验证畸形图像不会导致段错误 3. 检查调色板分配空指针处理 4. 验证 DCS 参数缩放整数溢出防护 5. 验证编码器大值延时计算 repo: libsixel #master
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