提出 #758862: libvips 8.19.0(7fab325d2) Out-of-Bounds Read情報

タイトルlibvips 8.19.0(7fab325d2) Out-of-Bounds Read
説明In `libvips/conversion/unpremultiply.c`, function `vips_unpremultiply_build()` does not verify that user-provided `alpha_band` is smaller than `in->Bands`. In `vips_unpremultiply_gen()` (`UNPRE_MANY` path), `p[alpha_band]` and `q[alpha_band]` are accessed directly, leading to out-of-bounds memory access for oversized `--alpha-band` values. The issue is reachable via normal `vips unpremultiply` CLI usage and is reproducible with ASAN as `heap-buffer-overflow`.
ソース⚠️ https://github.com/libvips/libvips/issues/4881
ユーザー
 Niebelungen (UID 95430)
送信2026年02月15日 16:01 (4 月 ago)
モデレーション2026年02月26日 17:33 (11 days later)
ステータス承諾済み
VulDBエントリ348011 [libvips 8.19.0 unpremultiply.c vips_unpremultiply_build alpha_band 情報漏えい]
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