CVE-2026-27798

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-15 and 6.9.13-40, a heap buffer over-read vulnerability occurs when processing an image with small dimension using the -wavelet-denoise operator. Versions 7.1.2-15 and 6.9.13-40 contain a patch.

A heap buffer over-read vulnerability occurs when processing an image with small dimension using the -wavelet-denoise operator.

==3693336==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x511000001280 at pc 0x5602c8b0cc75 bp 0x7ffcb105d510 sp 0x7ffcb105d500
READ of size 4 at 0x511000001280 thread T0

A heap buffer over-read vulnerability occurs when processing an image with small dimension using the -wavelet-denoise operator.

==3693336==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x511000001280 at pc 0x5602c8b0cc75 bp 0x7ffcb105d510 sp 0x7ffcb105d500
READ of size 4 at 0x511000001280 thread T0

Use ImageMagick to create, edit, compose, or convert bitmap images. It can read and write images in a variety of formats (over 200) including PNG, JPEG, GIF, HEIC, TIFF, DPX, EXR, WebP, Postscript, PDF, and SVG. Use ImageMagick to resize, flip, mirror, rotate, distort, shear and transform images, adjust image colors, apply various special effects, or draw text, lines, polygons, ellipses and Bézier curves.

Security Fix(es):

ImageMagick is an open-source software suite for image processing. A heap buffer over-read vulnerability exists in its WaveletDenoise module when processing certain small-sized images. An attacker could exploit this vulnerability by crafting a malicious image file, potentially causing the application to crash (denial of service) or, under specific conditions, leaking sensitive information from the process memory.(CVE-2026-27798)

ImageMagick is a widely used open-source software suite for image processing. A vulnerability exists in its DjVu decoder where an out-of-bounds read can occur when processing a specially crafted DjVu image file. An attacker could exploit this by tricking a user into processing a malicious DjVu file, potentially leading to information disclosure, application crash, or denial of service. This vulnerability has been disclosed in a GitHub Security Advisory.(CVE-2026-27799)

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-15 and 6.9.13-40, a heap buffer over-read vulnerability occurs when processing an image with small dimension using the -wavelet-denoise operator. Versions 7.1.2-15 and 6.9.13-40 contain a patch.

• CVE-2026-25797: fix PostScript/HTML code injection via unsanitized filenames
• CVE-2026-25982: fix heap out-of-bounds read in DICOM colormap decoder
• CVE-2026-25968: fix stack buffer overflow in MSL opacity attribute processing
• CVE-2026-25986: fix heap buffer overflow write in YUV 4:2:2 decoder
• CVE-2026-25987: fix heap buffer over-read in MAP image decoder
• CVE-2026-25970: fix signed integer overflow in SIXEL decoder
• CVE-2026-23952: fix NULL pointer dereference in MSL comment/label handlers
• CVE-2026-30883: fix heap buffer overflow in PNG profile writer
• CVE-2026-25988: fix MSL stack index not updated causing memory leak
• CVE-2026-27798: fix heap buffer over-read in WaveletDenoiseImage
• CVE-2026-25965: fix path traversal bypassing security policy

• CVE-2026-25797: fix PostScript/HTML code injection via unsanitized filenames
• CVE-2026-25982: fix heap out-of-bounds read in DICOM colormap decoder
• CVE-2026-25968: fix stack buffer overflow in MSL opacity attribute processing
• CVE-2026-25986: fix heap buffer overflow write in YUV 4:2:2 decoder
• CVE-2026-25987: fix heap buffer over-read in MAP image decoder
• CVE-2026-25970: fix signed integer overflow in SIXEL decoder
• CVE-2026-23952: fix NULL pointer dereference in MSL comment/label handlers
• CVE-2026-30883: fix heap buffer overflow in PNG profile writer
• CVE-2026-25988: fix MSL stack index not updated causing memory leak
• CVE-2026-27798: fix heap buffer over-read in WaveletDenoiseImage
• CVE-2026-25965: fix path traversal bypassing security policy

• SECURITY UPDATE: heap buffer over-read with wavelet-denoise operator
  • debian/patches/CVE-2026-27798.patch: use 4columns instead of 3columns for resource and memory allocation in WaveletDenoiseImage to prevent over-read when processing small-dimension images
  • CVE-2026-27798

• SECURITY UPDATE: heap buffer over-read with wavelet-denoise operator
  • debian/patches/CVE-2026-27798.patch: use 4columns instead of 3columns for resource and memory allocation in WaveletDenoiseImage to prevent over-read when processing small-dimension images
  • CVE-2026-27798

• SECURITY UPDATE: fix division by zero in YUV coder
  • debian/patches/CVE-2026-25799.patch: fix division by zero in YUV coder
  • CVE-2026-25799
• SECURITY UPDATE: fix NULL pointer dereference in SFW coder
  • debian/patches/CVE-2026-25795.patch: fix NULL pointer dereference in SFW coder
  • CVE-2026-25795
• SECURITY UPDATE: fix infinite loop in META coder
  • debian/patches/CVE-2026-26066.patch: fix infinite loop in META coder
  • CVE-2026-26066
• SECURITY UPDATE: fix vulnerability in JPEG coder
  • debian/patches/CVE-2026-26283.patch: fix vulnerability in JPEG coder
  • CVE-2026-26283
• SECURITY UPDATE: fix NULL pointer dereference in cache handling
  • debian/patches/CVE-2026-25798.patch: fix NULL pointer dereference in cache handling
  • CVE-2026-25798
• SECURITY UPDATE: fix vulnerability in PSD coder
  • debian/patches/CVE-2026-24481.patch: fix vulnerability in PSD coder
  • CVE-2026-24481
• SECURITY UPDATE: fix vulnerability in stegano coder
  • debian/patches/CVE-2026-25796.patch: fix vulnerability in stegano coder
  • CVE-2026-25796
• SECURITY UPDATE: fix vulnerability in FX processing
  • debian/patches/CVE-2026-27798.patch: fix vulnerability in FX processing
  • CVE-2026-27798

These are all security issues fixed in the ImageMagick-7.1.2.15-2.1 package on the GA media of openSUSE Tumbleweed.

This update for ImageMagick fixes the following issues:

• CVE-2026-22770: improper pointer initialization can cause denial of service (bsc#1256969).
• CVE-2026-23874: manipulation of digital images can lead to stack overflow (bsc#1256976).
• CVE-2026-23876: ImageMagick: maliciously crafted image can lead to heap buffer overflow (bsc#1256962).
• CVE-2026-23952: processing comment tag can cause null pointer dereference (bsc#1257076).
• CVE-2026-24481: Possible Heap Information Disclosure in PSD ZIP Decompression (bsc#1258743).
• CVE-2026-24484: denial of service vulnerability via multi-layer nested MVG to SVG conversion (bsc#1258790).
• CVE-2026-24485: denial of service via malformed PCD file processing (bsc#1258791).
• CVE-2026-25576: Out of bounds read in multiple coders that read raw pixel data (bsc#1258748).
• CVE-2026-25637: Denial of Service via crafted image due to memory leak (bsc#1258759).
• CVE-2026-25638: Denial of Service due to memory leak in image processing (bsc#1258793).
• CVE-2026-25794: Heap-buffer-overflow via signed integer overflow in WriteUHDRImage when writing UHDR images with large dimensions (bsc#1258749).
• CVE-2026-25795: Denial of Service due to NULL pointer dereference during temporary file creation failure (bsc#1258792).
• CVE-2026-25796: Memory leak of watermark Image object in ReadSTEGANOImage on multiple error/early-return paths (bsc#1258757).
• CVE-2026-25797: Code injection in various encoders (bsc#1258770).
• CVE-2026-25798: NULL Pointer Dereference in ClonePixelCacheRepository via crafted image (bsc#1258787).
• CVE-2026-25799: Division-by-Zero in YUV sampling factor validation leads to crash (bsc#1258786).
• CVE-2026-25897: Out-of-bounds heap write via integer overflow in sun decoder (bsc#1258799).
• CVE-2026-25898: Information disclosure or denial of service via crafted image with invalid pixel index (bsc#1258807).
• CVE-2026-25965: Policy bypass through path traversal allows reading restricted content despite secured policy (bsc#1258785).
• CVE-2026-25966: Security Policy Bypass through config/policy-secure.xml via "fd handler" leads to stdin/stdout access (bsc#1258780).
• CVE-2026-25967: Stack buffer overflow in FTXT reader via oversized integer field (bsc#1258779).
• CVE-2026-25968: MSL attribute stack buffer overflow leads to out of bounds write (bsc#1258776).
• CVE-2026-25969: Memory Leak in coders/ashlar.c (bsc#1258775).
• CVE-2026-25970: Memory corruption and denial of service via signed integer overflow in SIXEL decoder (bsc#1258802).
• CVE-2026-25971: MSL: Stack overflow in ProcessMSLScript (bsc#1258774).
• CVE-2026-25982: Heap Out-of-Bounds Read in DCM Decoder (bsc#1258772).
• CVE-2026-25983: Denial of service via crafted MSL script (bsc#1258805).
• CVE-2026-25985: Memory allocation with excessive without limits in the internal SVG decoder (bsc#1258812).
• CVE-2026-25986: Denial of Service via malicious YUV image processing (bsc#1258818).
• CVE-2026-25987: Memory disclosure and denial of service via crafted MAP files (bsc#1258821).
• CVE-2026-25988: Denial of Service due to memory leak in image processing (bsc#1258810).
• CVE-2026-25989: Integer overflow or wraparound and incorrect conversion between numeric types in the internal SVG decoder (bsc#1258771).
• CVE-2026-26066: Infinite loop when writing IPTCTEXT leads to denial of service via crafted profile (bsc#1258769).
• CVE-2026-26283: Possible infinite loop in JPEG encoder when using jpeg: extent (bsc#1258767).
• CVE-2026-26284: Heap overflow in pcd decoder leads to out of bounds read (bsc#1258765).
• CVE-2026-26983: Invalid MSL <map> can result in a use after free (bsc#1258763).
• CVE-2026-27798: Heap Buffer Over-read in WaveletDenoise when processing small images (bsc#1259018).
• CVE-2026-27799: ImageMagick has a heap Buffer Over-read in its DJVU image format handler (bsc#1259017).

Root has patched CVE-2026-27798 in the rootio-imagemagick package for Root:Debian:12. Multiple fixed versions available.

This update for ImageMagick fixes the following issues:

• CVE-2026-24481: Possible Heap Information Disclosure in PSD ZIP Decompression (bsc#1258743).
• CVE-2026-24484: denial of service vulnerability via multi-layer nested MVG to SVG conversion (bsc#1258790).
• CVE-2026-24485: denial of service via malformed PCD file processing (bsc#1258791).
• CVE-2026-25576: Out of bounds read in multiple coders that read raw pixel data (bsc#1258748).
• CVE-2026-25637: Denial of Service via crafted image due to memory leak (bsc#1258759).
• CVE-2026-25638: Denial of Service due to memory leak in image processing (bsc#1258793).
• CVE-2026-25795: Denial of Service due to NULL pointer dereference during temporary file creation failure (bsc#1258792).
• CVE-2026-25796: Memory leak of watermark Image object in ReadSTEGANOImage on multiple error/early-return paths (bsc#1258757).
• CVE-2026-25797: Code injection in various encoders (bsc#1258770).
• CVE-2026-25798: NULL Pointer Dereference in ClonePixelCacheRepository via crafted image (bsc#1258787).
• CVE-2026-25799: Division-by-Zero in YUV sampling factor validation leads to crash (bsc#1258786).
• CVE-2026-25897: Out-of-bounds heap write via integer overflow in sun decoder (bsc#1258799).
• CVE-2026-25898: Information disclosure or denial of service via crafted image with invalid pixel index (bsc#1258807).
• CVE-2026-25965: Policy bypass through path traversal allows reading restricted content despite secured policy (bsc#1258785).
• CVE-2026-25966: Security Policy Bypass through config/policy-secure.xml via 'fd handler' leads to stdin/stdout access (bsc#1258780).
• CVE-2026-25967: Stack buffer overflow in FTXT reader via oversized integer field (bsc#1258779).
• CVE-2026-25968: MSL attribute stack buffer overflow leads to out of bounds write (bsc#1258776).
• CVE-2026-25969: Memory Leak in coders/ashlar.c (bsc#1258775).
• CVE-2026-25970: Memory corruption and denial of service via signed integer overflow in SIXEL decoder (bsc#1258802).
• CVE-2026-25971: MSL: Stack overflow in ProcessMSLScript (bsc#1258774).
• CVE-2026-25982: Heap Out-of-Bounds Read in DCM Decoder (bsc#1258772).
• CVE-2026-25983: Denial of service via crafted MSL script (bsc#1258805).
• CVE-2026-25985: Memory allocation with excessive without limits in the internal SVG decoder (bsc#1258812).
• CVE-2026-25986: Denial of Service via malicious YUV image processing (bsc#1258818).
• CVE-2026-25987: Memory disclosure and denial of service via crafted MAP files (bsc#1258821).
• CVE-2026-25988: Denial of Service due to memory leak in image processing (bsc#1258810).
• CVE-2026-25989: Integer overflow or wraparound and incorrect conversion between numeric types in the internal SVG decoder (bsc#1258771).
• CVE-2026-26066: Infinite loop when writing IPTCTEXT leads to denial of service via crafted profile (bsc#1258769).
• CVE-2026-26283: Possible infinite loop in JPEG encoder when using jpeg: extent (bsc#1258767).
• CVE-2026-26284: Heap overflow in pcd decoder leads to out of bounds read (bsc#1258765).
• CVE-2026-26983: Invalid MSL <map> can result in a use after free (bsc#1258763).
• CVE-2026-27798: Heap Buffer Over-read in WaveletDenoise when processing small images (bsc#1259018).
• CVE-2026-27799: ImageMagick has a heap Buffer Over-read in its DJVU image format handler (bsc#1259017).

This update for ImageMagick fixes the following issues:

• CVE-2026-24481: Possible Heap Information Disclosure in PSD ZIP Decompression (bsc#1258743).
• CVE-2026-24484: denial of service vulnerability via multi-layer nested MVG to SVG conversion (bsc#1258790).
• CVE-2026-24485: denial of service via malformed PCD file processing (bsc#1258791).
• CVE-2026-25576: Out of bounds read in multiple coders that read raw pixel data (bsc#1258748).
• CVE-2026-25637: Denial of Service via crafted image due to memory leak (bsc#1258759).
• CVE-2026-25638: Denial of Service due to memory leak in image processing (bsc#1258793).
• CVE-2026-25795: Denial of Service due to NULL pointer dereference during temporary file creation failure (bsc#1258792).
• CVE-2026-25796: Memory leak of watermark Image object in ReadSTEGANOImage on multiple error/early-return paths (bsc#1258757).
• CVE-2026-25797: Code injection in various encoders (bsc#1258770).
• CVE-2026-25798: NULL Pointer Dereference in ClonePixelCacheRepository via crafted image (bsc#1258787).
• CVE-2026-25799: Division-by-Zero in YUV sampling factor validation leads to crash (bsc#1258786).
• CVE-2026-25897: Out-of-bounds heap write via integer overflow in sun decoder (bsc#1258799).
• CVE-2026-25898: Information disclosure or denial of service via crafted image with invalid pixel index (bsc#1258807).
• CVE-2026-25965: Policy bypass through path traversal allows reading restricted content despite secured policy (bsc#1258785).
• CVE-2026-25966: Security Policy Bypass through config/policy-secure.xml via 'fd handler' leads to stdin/stdout access (bsc#1258780).
• CVE-2026-25967: Stack buffer overflow in FTXT reader via oversized integer field (bsc#1258779).
• CVE-2026-25968: MSL attribute stack buffer overflow leads to out of bounds write (bsc#1258776).
• CVE-2026-25969: Memory Leak in coders/ashlar.c (bsc#1258775).
• CVE-2026-25970: Memory corruption and denial of service via signed integer overflow in SIXEL decoder (bsc#1258802).
• CVE-2026-25971: MSL: Stack overflow in ProcessMSLScript (bsc#1258774).
• CVE-2026-25983: Denial of service via crafted MSL script (bsc#1258805).
• CVE-2026-25985: Memory allocation with excessive without limits in the internal SVG decoder (bsc#1258812).
• CVE-2026-25986: Denial of Service via malicious YUV image processing (bsc#1258818).
• CVE-2026-25987: Memory disclosure and denial of service via crafted MAP files (bsc#1258821).
• CVE-2026-25988: Denial of Service due to memory leak in image processing (bsc#1258810).
• CVE-2026-25989: Integer overflow or wraparound and incorrect conversion between numeric types in the internal SVG decoder (bsc#1258771).
• CVE-2026-26066: Infinite loop when writing IPTCTEXT leads to denial of service via crafted profile (bsc#1258769).
• CVE-2026-26284: Heap overflow in pcd decoder leads to out of bounds read (bsc#1258765).
• CVE-2026-26983: Invalid MSL <map> can result in a use after free (bsc#1258763).
• CVE-2026-27798: Heap Buffer Over-read in WaveletDenoise when processing small images (bsc#1259018).
• CVE-2026-27799: ImageMagick has a heap Buffer Over-read in its DJVU image format handler (bsc#1259017).

This update for ImageMagick fixes the following issues:

• CVE-2026-24481: Possible Heap Information Disclosure in PSD ZIP Decompression (bsc#1258743).
• CVE-2026-24484: denial of service vulnerability via multi-layer nested MVG to SVG conversion (bsc#1258790).
• CVE-2026-24485: denial of service via malformed PCD file processing (bsc#1258791).
• CVE-2026-25576: Out of bounds read in multiple coders that read raw pixel data (bsc#1258748).
• CVE-2026-25637: Denial of Service via crafted image due to memory leak (bsc#1258759).
• CVE-2026-25638: Denial of Service due to memory leak in image processing (bsc#1258793).
• CVE-2026-25795: Denial of Service due to NULL pointer dereference during temporary file creation failure (bsc#1258792).
• CVE-2026-25796: Memory leak of watermark Image object in ReadSTEGANOImage on multiple error/early-return paths (bsc#1258757).
• CVE-2026-25797: Code injection in various encoders (bsc#1258770).
• CVE-2026-25798: NULL Pointer Dereference in ClonePixelCacheRepository via crafted image (bsc#1258787).
• CVE-2026-25799: Division-by-Zero in YUV sampling factor validation leads to crash (bsc#1258786).
• CVE-2026-25897: Out-of-bounds heap write via integer overflow in sun decoder (bsc#1258799).
• CVE-2026-25898: Information disclosure or denial of service via crafted image with invalid pixel index (bsc#1258807).
• CVE-2026-25965: Policy bypass through path traversal allows reading restricted content despite secured policy (bsc#1258785).
• CVE-2026-25966: Security Policy Bypass through config/policy-secure.xml via 'fd handler' leads to stdin/stdout access (bsc#1258780).
• CVE-2026-25970: Memory corruption and denial of service via signed integer overflow in SIXEL decoder (bsc#1258802).
• CVE-2026-25971: MSL: Stack overflow in ProcessMSLScript (bsc#1258774).
• CVE-2026-25983: Denial of service via crafted MSL script (bsc#1258805).
• CVE-2026-25986: Denial of Service via malicious YUV image processing (bsc#1258818).
• CVE-2026-25987: Memory disclosure and denial of service via crafted MAP files (bsc#1258821).
• CVE-2026-25988: Denial of Service due to memory leak in image processing (bsc#1258810).
• CVE-2026-25989: Integer overflow or wraparound and incorrect conversion between numeric types in the internal SVG decoder (bsc#1258771).
• CVE-2026-26066: Infinite loop when writing IPTCTEXT leads to denial of service via crafted profile (bsc#1258769).
• CVE-2026-26284: Heap overflow in pcd decoder leads to out of bounds read (bsc#1258765).
• CVE-2026-26983: Invalid MSL <map> can result in a use after free (bsc#1258763).
• CVE-2026-27798: Heap Buffer Over-read in WaveletDenoise when processing small images (bsc#1259018).
• CVE-2026-27799: ImageMagick has a heap Buffer Over-read in its DJVU image format handler (bsc#1259017).

It was discovered that ImageMagick incorrectly handled certain images when using the wavelet-denoise operator. An attacker could possibly use this issue to trigger a heap buffer over-read, resulting in information disclosure. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 24.04 LTS. (CVE-2026-27798)

It was discovered that ImageMagick incorrectly handled certain DJVU images. An attacker could possibly use this issue to trigger a heap buffer over-read, resulting in information disclosure. (CVE-2026-27799)

It was discovered that ImageMagick incorrectly handled certain MNG images. An attacker could possibly use this issue to trigger a stack buffer overflow, resulting in arbitrary code execution. (CVE-2026-28690)

It was discovered that ImageMagick incorrectly handled certain JBIG images. An attacker could possibly use this issue to trigger a pointer dereference error, resulting in a denial of service. (CVE-2026-28691)

It was discovered that ImageMagick incorrectly handled certain MAT images. An attacker could possibly use this issue to trigger a heap buffer over-read, resulting in information disclosure. (CVE-2026-28692)

It was discovered that ImageMagick incorrectly handled certain DIB images. An attacker could possibly use this issue to trigger an integer overflow, resulting in arbitrary code execution. (CVE-2026-28693)