Ubuntu Security Advisories

It was discovered that cpp-httplib incorrectly percent-decoded HTTP request header values. A remote attacker could use this to inject crafted header content possibly leading to response splitting, log injection or proxy smuggling.

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)

Jiasheng Jiang discovered that FFmpeg incorrectly handled memory in certain error-handling paths of its TensorFlow DNN backend. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 24.04 LTS. (CVE-2025-12343) Quang Luong discovered that FFmpeg incorrectly handled certain subsample data. An attacker could possibly use this issue to cause a denial of service or possibly execute arbitrary code. (CVE-2026-40962)

It was discovered that Perl's Archive::Tar module incorrectly handled symlink and hardlink targets during extraction. An attacker could use this issue to read or overwrite arbitrary files outside the extraction directory. (CVE-2026-42496) It was discovered that Perl had a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds. An attacker could use this issue to cause a denial of service or possibly execute arbitrary code. (CVE-2026-8376)

It was discovered that the Perl DBI module incorrectly handled certain error messages. An attacker could use this issue to cause applications using the Perl DBI module to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-9698) It was discovered that the Perl DBI module incorrectly handled memory when preparsing SQL statements that included more than nine binders. An attacker could use this issue to cause applications using the Perl DBI module to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-10879)