CLSA-2026-1773768935 Fix CVE(s): CVE-2026-25968, CVE-2026-25986, CVE-2026-25987

SECURITY UPDATE: stack buffer overflow in MSL opacity attribute parser - debian/patches/CVE-2026-25968.patch: replace fixed-size stack buffer with heap-allocated string and add length check - CVE-2026-25968 SECURITY UPDATE: heap buffer overflow write in YUV 4:2:2 image processing -...