Ubuntu ImageMagick Serious Buffer Overflow DoS Vulnerability USN-8468

Several security issues were fixed in ImageMagick. Software Description: - imagemagick: Image manipulation programs and library Details: 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 coul... Read the Full Advisory

Several security issues were fixed in ImageMagick.

Software Description:

- imagemagick: Image manipulation programs and library

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 coul...

The problem can be corrected by updating your system to the following package versions: Ubuntu 24.04 LTS imagemagick-6.q16 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro imagemagick-6.q16hdri 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libimage-magick-perl 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libimage-magick-q16-perl 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libimage-magick-q16hdri-perl 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagick++-6-headers 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagick++-6.q16-9t64 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagick++-6.q16-dev 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagick++-6.q16hdri-9t64 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagick++-6.q16hdri-dev 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagick++-dev 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagickcore-6-arch-config 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagickcore-6-headers 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagickcore-6.q16-7-extra 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagickcore-6.q16-7t64 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagickcore-6.q16-dev 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagickcore-6.q16hdri-7-extra 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagickcore-6.q16hdri-7t64 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagickcore-6.q16hdri-dev 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagickcore-dev 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagickwand-6-headers 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagickwand-6.q16-7t64 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagickwand-6.q16-dev 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagickwand-6.q16hdri-7t64 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagickwand-6.q16hdri-dev 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro libmagickwand-dev 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro perlmagick 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm10 Available with Ubuntu Pro Ubuntu 22.04 LTS imagemagick-6-common 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro imagemagick-6.q16 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro imagemagick-6.q16hdri 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro imagemagick-common 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libimage-magick-perl 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libimage-magick-q16-perl 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libimage-magick-q16hdri-perl 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagick++-6-headers 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagick++-6.q16-8 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagick++-6.q16-dev 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagick++-6.q16hdri-8 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagick++-6.q16hdri-dev 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagick++-dev 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagickcore-6-arch-config 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagickcore-6-headers 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagickcore-6.q16-6 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagickcore-6.q16-6-extra 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagickcore-6.q16-dev 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagickcore-6.q16hdri-6 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagickcore-6.q16hdri-6-extra 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagickcore-6.q16hdri-dev 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagickcore-dev 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagickwand-6-headers 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagickwand-6.q16-6 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagickwand-6.q16-dev 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagickwand-6.q16hdri-6 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagickwand-6.q16hdri-dev 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro libmagickwand-dev 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro perlmagick 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm11 Available with Ubuntu Pro Ubuntu 20.04 LTS imagemagick-6-common 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro imagemagick-common 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libimage-magick-perl 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libimage-magick-q16-perl 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libimage-magick-q16hdri-perl 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagick++-6-headers 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagick++-6.q16-8 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagick++-6.q16-dev 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagick++-6.q16hdri-dev 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagick++-dev 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagickcore-6-arch-config 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagickcore-6-headers 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagickcore-6.q16-6-extra 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagickcore-6.q16-dev 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagickcore-6.q16hdri-6-extra 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagickcore-6.q16hdri-dev 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagickcore-dev 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagickwand-6-headers 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagickwand-6.q16-6 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagickwand-6.q16-dev 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagickwand-6.q16hdri-6 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagickwand-6.q16hdri-dev 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro libmagickwand-dev 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro perlmagick 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm11 Available with Ubuntu Pro Ubuntu 18.04 LTS imagemagick-6.q16 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro imagemagick-6.q16hdri 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libimage-magick-perl 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libimage-magick-q16-perl 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libimage-magick-q16hdri-perl 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagick++-6-headers 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagick++-6.q16-7 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagick++-6.q16-dev 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagick++-6.q16hdri-7 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagick++-6.q16hdri-dev 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagick++-dev 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagickcore-6.q16-3 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagickcore-6.q16-3-extra 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagickcore-6.q16-dev 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagickcore-6.q16hdri-3 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagickcore-6.q16hdri-3-extra 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagickcore-6.q16hdri-dev 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagickcore-dev 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagickwand-6-headers 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagickwand-6.q16-3 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagickwand-6.q16-dev 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagickwand-6.q16hdri-3 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagickwand-6.q16hdri-dev 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro libmagickwand-dev 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro perlmagick 8:6.9.7.4+dfsg-16ubuntu6.15+esm13 Available with Ubuntu Pro Ubuntu 16.04 LTS imagemagick 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro imagemagick-6.q16 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro imagemagick-common 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro libimage-magick-perl 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro libimage-magick-q16-perl 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro libmagick++-6-headers 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro libmagick++-6.q16-5v5 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro libmagick++-6.q16-dev 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro libmagickcore-6-arch-config 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro libmagickcore-6-headers 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro libmagickcore-6.q16-2 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro libmagickcore-6.q16-2-extra 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro libmagickcore-6.q16-dev 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro libmagickwand-6-headers 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro libmagickwand-6.q16-2 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro libmagickwand-6.q16-dev 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro perlmagick 8:6.8.9.9-7ubuntu5.16+esm21 Available with Ubuntu Pro Ubuntu 14.04 LTS imagemagick 8:6.7.7.10-6ubuntu3.13+esm22 Available with Ubuntu Pro imagemagick-common 8:6.7.7.10-6ubuntu3.13+esm22 Available with Ubuntu Pro libmagick++-dev 8:6.7.7.10-6ubuntu3.13+esm22 Available with Ubuntu Pro libmagick++5 8:6.7.7.10-6ubuntu3.13+esm22 Available with Ubuntu Pro libmagickcore-dev 8:6.7.7.10-6ubuntu3.13+esm22 Available with Ubuntu Pro libmagickcore5 8:6.7.7.10-6ubuntu3.13+esm22 Available with Ubuntu Pro libmagickcore5-extra 8:6.7.7.10-6ubuntu3.13+esm22 Available with Ubuntu Pro libmagickwand-dev 8:6.7.7.10-6ubuntu3.13+esm22 Available with Ubuntu Pro libmagickwand5 8:6.7.7.10-6ubuntu3.13+esm22 Available with Ubuntu Pro perlmagick 8:6.7.7.10-6ubuntu3.13+esm22 Available with Ubuntu Pro In general, a standard system update will make all the necessary changes.

CVE-2026-27798, CVE-2026-27799, CVE-2026-28690, CVE-2026-28691,

CVE-2026-28692, CVE-2026-28693

Ubuntu Security Notice USN-8468-1

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