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-specificationFeedgenTue, 18 Aug 2026 20:20:02 +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-8642-1It was discovered that c3p0 was vulnerable to remote code execution via maliciously crafted serialized objects and JNDI references. An attacker could use this to execute arbitrary code, bypass security restrictions, or cause a denial of service.https://ubuntu.com/security/notices/USN-8642-1Tue, 18 Aug 2026 13:02:22 +0000https://ubuntu.com/security/notices/USN-8640-1It was discovered that Engrampa incorrectly handled symbolic links when extracting certain archives. An attacker could possibly use this issue to write arbitrary files and execute arbitrary code.https://ubuntu.com/security/notices/USN-8640-1Mon, 17 Aug 2026 17:29:24 +0000https://ubuntu.com/security/notices/USN-8639-1Patrick Keshishian discovered that libpng incorrectly handled certain text chunks. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 LTS. (CVE-2016-10087) It was discovered that libpng incorrectly handled certain malformed images. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-14048) It was discovered that libpng incorrectly handled memory when freeing certain images. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 LTS. (CVE-2019-7317) It was discovered that libpng incorrectly handled memory when processing certain images. An attacker could possibly use this issue to cause a denial of service, or execute arbitrary code. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2026-33416) It was discovered that libpng incorrectly handled certain images. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 20.04 LTS. (CVE-2026-33636) It was discovered that libpng incorrectly handled memory when processing certain images. An attacker could possibly use this issue to cause a denial of service or obtain sensitive information. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2026-34757) Seung Min Shin discovered that libpng incorrectly handled certain animated images. An attacker could possibly use this issue to cause libpng to misinterpret image data. This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2026-40930)https://ubuntu.com/security/notices/USN-8639-1Mon, 17 Aug 2026 16:46:16 +0000https://ubuntu.com/security/notices/USN-8631-4Siebe 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; - InfiniBand drivers; - Network drivers; - NVME drivers; - Ext4 file system; - SMB network file system; - IPv4 networking; - Network traffic control; - TCP network protocol; - Locking primitives; - IPv6 networking; - Multipath TCP; - Netfilter; - SCTP protocol; - SMC sockets; (CVE-2026-31414, CVE-2026-31448, CVE-2026-31705, CVE-2026-43198, CVE-2026-43378, CVE-2026-43499, CVE-2026-46266, CVE-2026-46331, CVE-2026-52924, CVE-2026-52989, CVE-2026-53086, CVE-2026-53176, CVE-2026-53212, CVE-2026-53215, CVE-2026-53225, CVE-2026-53228, CVE-2026-53359) https://ubuntu.com/security/notices/USN-8631-4Mon, 17 Aug 2026 16:46:13 +0000https://ubuntu.com/security/notices/USN-8629-2Several 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; - 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-8629-2Mon, 17 Aug 2026 16:43:06 +0000https://ubuntu.com/security/notices/USN-8631-3Siebe 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; - InfiniBand drivers; - Network drivers; - NVME drivers; - Ext4 file system; - SMB network file system; - IPv4 networking; - Network traffic control; - TCP network protocol; - Locking primitives; - IPv6 networking; - Multipath TCP; - Netfilter; - SCTP protocol; - SMC sockets; (CVE-2026-31414, CVE-2026-31448, CVE-2026-31705, CVE-2026-43198, CVE-2026-43378, CVE-2026-43499, CVE-2026-46266, CVE-2026-46331, CVE-2026-52924, CVE-2026-52989, CVE-2026-53086, CVE-2026-53176, CVE-2026-53212, CVE-2026-53215, CVE-2026-53225, CVE-2026-53228, CVE-2026-53359) https://ubuntu.com/security/notices/USN-8631-3Thu, 13 Aug 2026 21:47:34 +0000