CVE-2026-5870: prevent integer overflow in the pixel offset calculations of
SkReadPixelsRec/SkWritePixelsRec by routing them through SkSafeMath
CVE-2026-7920: stop getRPProgram() mutating the shared SkSL program, which
raced with the Ganesh backend reading it and freed IR nodes under it
CVE-2026-7923: fix the discard_stack guard in the SkSL raster pipeline
builder so it no longer removes more stack entries than the op pushed
CVE-2026-10009: bound the number of partial contours in SkPathWriter::assemble
so the folded-triangle entry count can no longer overflow
CVE-2026-11663: replace the single shared glyph-run builder on SkCanvas with
a stack of builders, drop drawable serialization from SkCustomTypeface and
restrict the tags deserialized from SkPictures
All five are backports into the vendored Skia only; no public API or ABI of
the package is touched.