openSUSE-SU-2026:21289-1

This update for tiff fixes the following issues

• CVE-2026-12912: heap-based buffer overflow when processing crafted PixarLog-compressed TIFF image (bsc#1269779).
• CVE-2026-36849: denial of service when processing a a crafted TIFF file containing a large SamplesPerPixel tag value (bsc#1268434).

Changes for tiff:

• Update to 4.7.2:

Software configuration changes:

• cmake: Fix bundle identifiers to use reverse-DNS format
• cmake: Fix and improve Apple framework build support
• cmake: Use TurboJPEG CONFIG by default (issue #767)
• cmake: changes related to 8-/12-bit modes
• cmake: Replace CMath::CMath with direct link to avoid export.
• Support for iOS-derived builds
• Simplify cmake byte order version check
• Add additional warnings, primarily floating precision conversions and integer arithmetic conversions
• configure.ac: Require bootstrap with at least Autoconf 2.71.

Bug fixes:

• Handle negative TIFFReadFile results before state updates (issue #854)
• tif_dirread.c: fix copy-paste bug in ChopUpSingleUncompressedStrip
• tif_read.c: Fixed division by zero in TIFFStartStrip() (issue #777)
• tif_dirwrite.c: add integer overflow checks to allocation size calculations
• tif_print.c: add integer overflow checks to allocation size calculations
• tif_write.c: fix OOB read and underflow in TIFFAppendToStrip copy loop
• DumpModeSeek: add bounds check to prevent OOB pointer advance
• TIFFGrowStrips: fix use-after-free on partial realloc failure.
• Fix NULL dereference in _TIFFReserveLargeEnoughWriteBuffer() by validating the strip bytecount array before accessing it.
• TIFFRGBAImage: avoid int overflows in put functions (issue #830)
• tif_getimage: fix inconsistent fromskew handling in put16bitbwtile (issue #792)
• tif_getimage: Widen pointer-offset arithmetic in tif_getimage
• putcontig8bitYCbCr44tile: fix wrong fromskew computation (issue #798)
• putcontig8bitYCbCr42tile: Reject invalid YCbCr subsampling when image dimensions are smaller than the subsampling block to prevent out-of-bounds writes. (issue #753)
• TIFFFillStrip/Tile(): avoid excessive memory allocation (issue #831)
• TIFFLinkDirectory() checks for IFD loops (issue #788)
• Check result of _TIFFCheckRealloc to prevent memory leaks and segmentation fault when reallocation fails.
• TIFFVTileSize64(): in YCbCr contig non upsampled mode, validate td_samplesperpixel==3 (issue #805)
• TIFFReadDirEntryPersampleShort(): be tolerant to tags like SampleFormat not having 1 or SamplesPerPixel values (https://github.com/OSGeo/gdal/issues/13465)
• tif_getimage: reject tile widths that would overflow toskew (issue #808)
• Fix integer overflow in _TIFFPartialReadStripArray on 32-bit.
• TIFFAppendToStrip(): add some checks to avoid null-pointer-dereferencing (issue #777).
• _TIFFGetStrileOffsetOrByteCountValue(): fix potential crash on corrupted files when file opened in 'O' mode (https://issues.oss-fuzz.com/issues/471328917)
• TIFFReadDirectory(): re-set TIFF_LAZYSTRILELOAD if file opened in 'O' mode
• _TIFFMergeFields(): avoid NULL ptr dereference (issue #755).
• Check td_stripbytecount_p and td_stripoffset_p for NULL pointer before (re-)writing to file. (issue #749)
• JPEGDecodeRaw: initialize output buffer to avoid returning uninitialized memory (issue #892)
• JPEG decompressor: initialize output buffer when JPEG image is smaller than strile dimension to avoid heap memory disclosure (issue #826)
• JPEG: fix generation of tiled 12-bit JPEG compressed files with libjpeg-turbo 3.0.3 (issue #773)
• JPEGDecode(): fix memory leak in error code path (https://issues.oss-fuzz.com/issues/471945501)
• tif_jpeg: reject mismatched JPEG data precision to avoid write overflow
• Fix signed left-shift UB in LogLuv RANDITHER encoding (issue #850)
• PixarLog: error out on invalid ABGR output buffer sizes.
• PixarLog: complete ABGR bounds check for multi-row strip decoding.
• PixarLog: fix undoing horizontal differencing when SamplesPerPixel != 3 and 4 (issue #789).
• PixarLog codec: fix potential integer overflow/out-of-bounds access (issue #797)
• TIFFAdvanceDirectory(): avoid potential read heap-buffer-overflow in mmap code path on 32 bit builds (https://issues.oss-fuzz.com/issues/506737072)
• OJPEG: fix integer overflow in subsampling buffer allocation.
• OJPEG: fix nullptr deref when changing compression method from OJPEG to something else (issue #795).
• OJPEG fix potential integer overflow/out-of-bounds access (issue #796).
• ojpeg: prevent EOF infinite loop (fixes commit 2a3d55b)
• fix null pointer deference in issue #782.
• fix stack-overflow in issue #784.

Other changes:

• Change EXIF and GPS tag type from IFD8 to LONG8 per EXIF-specification (issue #739).
• Harden integer size and offset calculations (issue #897)
• TIFFComputeTile/TIFFComputeStrip: use overflow-checked multiplication
• Move widening casts inside multiplication scope.
• Lots of compiler warning fixes related to enabling more warning flags
• Align writing and reading of TIFF_LONG8 and TIFF_IFD8 tags (issue #773)
• TIFFFillStrip(): prevent harmless unsigned integer overflow