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-specificationFeedgenWed, 19 Aug 2026 13:17:41 +0000https://ubuntu.com/security/notices/USN-8093-2USN-8093-1 fixed a vulnerability in libssh. This update provides the corresponsing fix for Ubuntu 26.04 LTS. Original advisory details: It was discovered that libssh incorrectly performed bounds checking when processing SFTP extensions. If a client application queried extension data out of bounds, it could cause the application to crash, resulting in a denial of service, or exhibit unintended behavior.https://ubuntu.com/security/notices/USN-8093-2Wed, 19 Aug 2026 08:15:33 +0000https://ubuntu.com/security/notices/USN-8113-2USN 8113-1 fixed vulnerabilities in tiff. This update provides the corresponding fixes for Ubuntu 26.04 LTS. Original advisory details: It was discovered that LibTIFF did not properly handle memory when processing certain images. An attacker could possibly use this issue to cause LibTIFF to crash, resulting in a denial of service. (CVE-2025-61143) It was discovered that LibTIFF did not properly handle memory when processing malformed TIFF directories. An attacker could possibly use this issue to cause LibTIFF to crash, resulting in a denial of service. (CVE-2025-61144)https://ubuntu.com/security/notices/USN-8113-2Wed, 19 Aug 2026 07:39:43 +0000https://ubuntu.com/security/notices/USN-8630-3Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - x86 architecture; - InfiniBand drivers; - Network drivers; - Mellanox network drivers; - File systems infrastructure; - IPv4 networking; - Network traffic control; - TCP network protocol; - B.A.T.M.A.N. meshing protocol; - IPv6 networking; - Multipath TCP; - Netfilter; - RxRPC session sockets; - SCTP protocol; - SMC sockets; (CVE-2026-43083, CVE-2026-43197, CVE-2026-43198, CVE-2026-43465, CVE-2026-46242, CVE-2026-46325, CVE-2026-46331, CVE-2026-52914, CVE-2026-52924, CVE-2026-52931, CVE-2026-53151, CVE-2026-53176, CVE-2026-53212, CVE-2026-53215, CVE-2026-53225, CVE-2026-53228, CVE-2026-53359) https://ubuntu.com/security/notices/USN-8630-3Tue, 18 Aug 2026 21:00:12 +0000https://ubuntu.com/security/notices/USN-8636-2Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - x86 architecture; - InfiniBand drivers; - Media drivers; - Network drivers; - Mellanox network drivers; - Texas Instruments network drivers; - NVME drivers; - File systems infrastructure; - SMB network file system; - IPv4 networking; - Network traffic control; - TCP network protocol; - Locking primitives; - Memory management; - IPv6 networking; - Multipath TCP; - Netfilter; - RxRPC session sockets; - SCTP protocol; - SMC sockets; (CVE-2026-31405, CVE-2026-31414, CVE-2026-31501, CVE-2026-31589, CVE-2026-31633, CVE-2026-31636, CVE-2026-31705, CVE-2026-43198, CVE-2026-43379, CVE-2026-43465, CVE-2026-43499, CVE-2026-46113, CVE-2026-46137, CVE-2026-46242, CVE-2026-46331, CVE-2026-52924, CVE-2026-52989, CVE-2026-53086, CVE-2026-53131, CVE-2026-53176, CVE-2026-53212, CVE-2026-53225, CVE-2026-53228, CVE-2026-53359) https://ubuntu.com/security/notices/USN-8636-2Tue, 18 Aug 2026 20:53:11 +0000https://ubuntu.com/security/notices/USN-8629-3Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - x86 architecture; - InfiniBand drivers; - Network drivers; - Network traffic control; - IPv4 networking; - IPv6 networking; - Netfilter; - RxRPC session sockets; - SCTP protocol; (CVE-2026-46331, CVE-2026-52924, CVE-2026-53131, CVE-2026-53151, CVE-2026-53175, CVE-2026-53176, CVE-2026-53186, CVE-2026-53212, CVE-2026-53215, CVE-2026-53216, CVE-2026-53221, CVE-2026-53224, CVE-2026-53225, CVE-2026-53228, CVE-2026-53246, CVE-2026-53247, CVE-2026-53260, CVE-2026-53359) https://ubuntu.com/security/notices/USN-8629-3Tue, 18 Aug 2026 20:49:14 +0000https://ubuntu.com/security/notices/USN-8646-1Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - OCFS2 file system; - B.A.T.M.A.N. meshing protocol; - Netfilter; - SCTP protocol; (CVE-2026-52914, CVE-2026-53002, CVE-2026-53043, CVE-2026-53224, CVE-2026-53246, CVE-2026-53309) https://ubuntu.com/security/notices/USN-8646-1Tue, 18 Aug 2026 18:26:29 +0000https://ubuntu.com/security/notices/USN-8645-1Siebe Devroe, Héloïse Gollier, and Mathy Vanhoef discovered that the WiFi implementation in the Linux kernel did not properly handle aggregated frames in mesh networks, due to an incorrect fix for CVE-2020-24588. A physically proximate attacker could use this issue to inject packets. (CVE-2025-27558) Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - x86 architecture; - Cryptographic API; - GPU drivers; - InfiniBand drivers; - Media drivers; - NVIDIA Tegra memory controller driver; - Network drivers; - STMicroelectronics network drivers; - NVME drivers; - File systems infrastructure; - Ext4 file system; - OCFS2 file system; - IPv4 networking; - Network traffic control; - TCP network protocol; - Locking primitives; - B.A.T.M.A.N. meshing protocol; - Ceph Core library; - IPv6 networking; - Multipath TCP; - Netfilter; - SCTP protocol; - SMC sockets; - TIPC protocol; (CVE-2021-47354, CVE-2021-47378, CVE-2024-38612, CVE-2026-31405, CVE-2026-31414, CVE-2026-31448, CVE-2026-31649, CVE-2026-31657, CVE-2026-31668, CVE-2026-43071, CVE-2026-43198, CVE-2026-43493, CVE-2026-43499, CVE-2026-46266, CVE-2026-46331, CVE-2026-52914, CVE-2026-52924, CVE-2026-52931, CVE-2026-52955, CVE-2026-52982, CVE-2026-52986, CVE-2026-52993, CVE-2026-53002, CVE-2026-53006, CVE-2026-53043, CVE-2026-53045, CVE-2026-53088, CVE-2026-53176, CVE-2026-53224, CVE-2026-53225, CVE-2026-53228, CVE-2026-53246, CVE-2026-53309, CVE-2026-53359) https://ubuntu.com/security/notices/USN-8645-1Tue, 18 Aug 2026 18:23:33 +0000https://ubuntu.com/security/notices/USN-8644-1Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - File systems infrastructure; - OCFS2 file system; - B.A.T.M.A.N. meshing protocol; - SCTP protocol; - TIPC protocol; (CVE-2026-43071, CVE-2026-52914, CVE-2026-52993, CVE-2026-53043, CVE-2026-53224, CVE-2026-53246, CVE-2026-53309) https://ubuntu.com/security/notices/USN-8644-1Tue, 18 Aug 2026 18:20:23 +0000https://ubuntu.com/security/notices/USN-8643-1Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Network drivers; - Open vSwitch; - SCTP protocol; (CVE-2026-53224, CVE-2026-53246, CVE-2026-53247, CVE-2026-64531) https://ubuntu.com/security/notices/USN-8643-1Tue, 18 Aug 2026 18:08:07 +0000https://ubuntu.com/security/notices/USN-8641-1Miha Zupan discovered that .NET did not properly interpret certain HTTP requests. An attacker could possibly use this issue to perform request smuggling and bypass a security feature. (CVE-2026-62899) Ivan Demchuk discovered that .NET did not properly handle the removal of sensitive information before storage or transfer. An attacker could possibly use this issue to disclose sensitive information. (CVE-2026-62900) Kevin Gosse discovered that .NET did not properly check an input for a loop condition. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-62901) Kevin Gosse discovered that .NET did not properly perform error checking when securing shared resources used for diagnostics IPC. An attacker could possibly use this issue to elevate privileges. (CVE-2026-62909)https://ubuntu.com/security/notices/USN-8641-1Tue, 18 Aug 2026 15:02:43 +0000