https://ubuntu.com/security/notices/rss.xmlRecent content on Ubuntu security notices2026 Canonical Ltd. Ubuntu and Canonical are registered trademarks of Canonical Ltd.http://www.rssboard.org/rss-specificationFeedgenThu, 01 Oct 2026 22:06:47 +0000https://ubuntu.com/security/notices/USN-8863-1Yazan Balawneh discovered that GStreamer Good Plugins incorrectly handled certain FLAC audio streams. An attacker could possibly use this issue to obtain sensitive information. (CVE-2026-17072) Seonwook Kim discovered that GStreamer Good Plugins incorrectly parsed certain AVI files. An attacker could possibly use this issue to cause a denial of service or obtain sensitive information. (CVE-2026-73433) Seonwook Kim discovered that GStreamer Good Plugins did not correctly parse certain AVI files. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-73434) Seonwook Kim discovered that GStreamer Good Plugins incorrectly handled certain closed caption data. An attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-88914)https://ubuntu.com/security/notices/USN-8863-1Thu, 01 Oct 2026 16:46:33 +0000https://ubuntu.com/security/notices/USN-8862-1It was discovered that libXpm did not correctly handle XPM images with zero-dimension values. A local attacker could possibly use this issue to cause libXpm to use excessive resources, leading to a denial of service.https://ubuntu.com/security/notices/USN-8862-1Thu, 01 Oct 2026 12:51:01 +0000https://ubuntu.com/security/notices/USN-8861-1It was discovered that OpenSSL had an inefficient algorithm in its QUIC stream reassembly implementation. A remote attacker could possibly use this issue to cause OpenSSL to use excessive CPU resources, leading to a denial of service. (CVE-2026-42772) It was discovered that OpenSSL did not properly limit memory allocated for QUIC packet buffers. A remote attacker could possibly use this issue to cause OpenSSL to use excessive memory resources, leading to a denial of service. (CVE-2026-54873)https://ubuntu.com/security/notices/USN-8861-1Thu, 01 Oct 2026 12:02:00 +0000https://ubuntu.com/security/notices/USN-8860-1It was discovered that OpenStack Designate did not properly validate overlapping zones under certain circumstances. An authenticated user could possibly use this issue to redirect DNS traffic to attacker-controlled systems or cause a denial of service.https://ubuntu.com/security/notices/USN-8860-1Thu, 01 Oct 2026 11:17:31 +0000https://ubuntu.com/security/notices/USN-8857-1It was discovered that KCoreAddons incorrectly handled shell argument quoting in KShell::quoteArgs. The parsing did not adequately handle shell metacharacters, which could lead to a shell escape. An attacker could possibly use this issue to execute arbitrary commands in applications that relied on this method to handle user input.https://ubuntu.com/security/notices/USN-8857-1Thu, 01 Oct 2026 10:48:57 +0000https://ubuntu.com/security/notices/USN-8858-1It was discovered that Authen::SASL, a Perl authentication library, did not properly validate login attempts. An attacker could possibly use this issue to gain unauthorized access.https://ubuntu.com/security/notices/USN-8858-1Wed, 30 Sep 2026 16:40:43 +0000https://ubuntu.com/security/notices/USN-8859-1It was discovered that ImageMagick did not correctly handle certain images. An attacker could possibly use this issue to cause a denial of service or obtain sensitive information. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 24.04 LTS. (CVE-2026-56367) It was discovered that ImageMagick did not correctly handle certain images. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-93586) It was discovered that ImageMagick did not correctly handle certain images. A local attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-93587, CVE-2026-93588) It was discovered that ImageMagick did not correctly handle certain images. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-93589) It was discovered that ImageMagick did not correctly handle certain images. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-93590)https://ubuntu.com/security/notices/USN-8859-1Wed, 30 Sep 2026 16:39:48 +0000https://ubuntu.com/security/notices/USN-8855-1It was discovered that GStreamer Bad Plugins incorrectly validated the size of multi-channel audio blocks. An attacker could possibly use this issue with a specially crafted WAV file to cause the program to crash, resulting in a denial of service, or possibly execute arbitrary code.https://ubuntu.com/security/notices/USN-8855-1Wed, 30 Sep 2026 16:05:01 +0000https://ubuntu.com/security/notices/USN-8856-1It was discovered that Kdenlive allowed dangerous proxy parameters when processing attacker-controlled project files. An attacker could use this to execute arbitrary commands via the MLT framework's ante/post consumer properties.https://ubuntu.com/security/notices/USN-8856-1Wed, 30 Sep 2026 15:59:30 +0000https://ubuntu.com/security/notices/USN-8845-1Keith Linneman discovered that GVfs did not properly validate data received from SFTP servers. An attacker could possibly use this issue to cause a heap buffer overflow, resulting in arbitrary code execution or a denial of service. (CVE-2026-84268) It was discovered that GVfs incorrectly handled file ownership when creating private D-Bus sockets in the admin backend. A local attacker could possibly use this issue to change the ownership of arbitrary system files, resulting in privilege escalation to root. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-88924)https://ubuntu.com/security/notices/USN-8845-1Wed, 30 Sep 2026 15:54:56 +0000