USN-8851-1: Linux kernel vulnerabilities

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: - Network file system NFS server daemon; - IPv6 networking; - Netfilter; CVE-2025-38724, CVE-2026-53131, CVE-2026-532...

USN-8850-1: Linux kernel (BlueField) vulnerabilities

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: - Network file system NFS server daemon; - OCFS2 file system; - IPv6 networking; - Netfilter; - SCTP protocol;...

USN-8849-1: Linux kernel (NVIDIA Tegra) vulnerabilities

It was discovered that some Arm processors could complete a broadcast translation lookaside buffer TLB invalidation before memory writes made through the invalidated translation were globally observed. A local attacker could possibly use this to write to memory after permission to do so had been...

USN-8818-4: Linux kernel vulnerabilities

It was discovered that some Arm processors could complete a broadcast translation lookaside buffer TLB invalidation before memory writes made through the invalidated translation were globally observed. A local attacker could possibly use this to write to memory after permission to do so had been...

USN-8819-4: Linux kernel (FIPS) vulnerabilities

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: - Network file system NFS server daemon; - IPv6 networking; - Netfilter; CVE-2025-38724, CVE-2026-53131, CVE-2026-532...

USN-8730-7: Linux kernel (FIPS) vulnerability

A security issue was discovered in the Linux kernel. An attacker could possibly use this to compromise the system. This update corrects flaws in the following subsystems: - IPv6 networking; - Netfilter;...

USN-8817-2: Linux kernel (AWS FIPS) vulnerabilities

It was discovered that some Arm processors could complete a broadcast translation lookaside buffer TLB invalidation before memory writes made through the invalidated translation were globally observed. A local attacker could possibly use this to write to memory after permission to do so had been...

USN-8847-2: OpenSSL vulnerabilities

USN-8847-1 fixed vulnerabilities in OpenSSL. This update provides the corresponding fix for OpenSSL on Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. Original advisory details: It was discovered that OpenSSL incorrectly handled certain certificate revocation list...

USN-8847-1: OpenSSL vulnerabilities

It was discovered that OpenSSL incorrectly handled certain certificate revocation list distribution point names. An attacker could possibly use this issue to cause OpenSSL to consume excessive memory, resulting in a denial of service. CVE-2026-35189 It was discovered that OpenSSL incorrectly...

USN-8846-1: libheif vulnerabilities

Yuqi Qiu and Xiang Li discovered that libheif incorrectly handled certain compressed metadata. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. CVE-2026-84384 Yuqi Qiu and Xiang Li discovered that libheif...

USN-8844-1: c-ares vulnerability

It was discovered that c-ares incorrectly handled certain query completion callbacks. An attacker could possibly use this issue to trigger a use- after-free or double-free, resulting in a denial of service or arbitrary code execution...

USN-8843-1: FreeIPMI vulnerabilities

It was discovered that FreeIPMI incorrectly handled certain malformed Fujitsu SEL long-text responses, leading to a stack-based buffer overflow. An attacker in control of a malicious IPMI device could possibly use this issue to cause FreeIPMI to crash, resulting in a denial of service, or possibl...

USN-8818-3: Linux kernel vulnerabilities

It was discovered that some Arm processors could complete a broadcast translation lookaside buffer TLB invalidation before memory writes made through the invalidated translation were globally observed. A local attacker could possibly use this to write to memory after permission to do so had been...

USN-8819-3: Linux kernel vulnerabilities

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: - Network file system NFS server daemon; - IPv6 networking; - Netfilter; CVE-2025-38724, CVE-2026-53131, CVE-2026-532...

USN-8842-1: Linux kernel (NVIDIA) vulnerabilities

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: - InfiniBand drivers; - Network drivers; - TCM subsystem; - B.A.T.M.A.N. meshing protocol; - HSR network protocol; -...

USN-8728-3: Linux kernel (Oracle) vulnerabilities

It was discovered that some Arm processors could complete a broadcast translation lookaside buffer TLB invalidation before memory writes made through the invalidated translation were globally observed. A local attacker could possibly use this to write to memory after permission to do so had been...

USN-8816-2: Linux kernel vulnerabilities

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: - ARM64 architecture; - S390 architecture; - x86 architecture; - DRBD Distributed Replicated Block Device drivers; -...

USN-8729-6: Linux kernel (AWS) vulnerabilities

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: - ARM32 architecture; - ARM64 architecture; - PowerPC architecture; - Compute Acceleration Framework; - Drivers core;...

USN-8841-1: Perl DBI module vulnerabilities

It was discovered that the Perl DBI module did not correctly handle certain integer arithmetic operations. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. CVE-2026-73193, CVE-2026-73194...

USN-8487-2: curl regression

USN-8487-1 fixed vulnerabilities in curl. Unfortunately that update contained an incomplete fix for CVE-2026-8927. This update fixes the problem. Original advisory details: Andrew Nesbitt discovered that curl could reuse an existing live connection during STARTTLS-based connection upgrades even...

USN-8840-1: libevent vulnerabilities

Michał Majchrowicz and Marcin Wyczechowski discovered that libevent incorrectly handled certain DNS responses. A remote attacker could possibly use this issue to cause a denial of service or execute arbitrary code. CVE-2026-63387 It was discovered that libevent incorrectly handled certain...

USN-8839-1: Atril vulnerabilities

It was discovered that Atril did not properly sanitize command-line arguments in PDF /GoToR actions. If a user opened a specially crafted PDF file, an attacker could possibly use this issue to execute arbitrary code. CVE-2026-46529 It was discovered that Atril incorrectly handled certain PDF file...

USN-8838-1: catdoc vulnerabilities

It was discovered that catdoc had an integer overflow when processing shared string tables in malformed spreadsheet files. An attacker could possibly use this issue to cause catdoc to crash or execute arbitrary code. CVE-2024-48877 It was discovered that catdoc had an integer overflow when...

USN-8837-1: pdfminer vulnerabilities

It was discovered that pdfminer did not safely parse specially crafted PDF files. An attacker could possibly use these issues to execute arbitrary code. CVE-2025-64512, CVE-2025-70559...

USN-8835-1: Emacs vulnerability

It was discovered that Emacs improperly handled specially crafted SVG images, resulting in memory corruption. An attacker could possibly use this issue to cause Emacs to crash, resulting in a denial of service, or obtain sensitive information...

USN-8832-1: Booth vulnerability

It was discovered that Booth did not properly validate message authentication codes under certain circumstances. A remote attacker could possibly use this issue to bypass authentication...

USN-8830-1: phpseclib vulnerabilities

It was discovered that phpseclib did not perform constant-time padding validation when using AES in CBC mode. A remote attacker could possibly use this issue to obtain sensitive information. CVE-2026-32935 It was discovered that phpseclib did not use a constant-time comparison when validating SSH...

USN-8829-1: Plasma Workspace vulnerability

Fabian Vogt discovered that Plasma Workspace did not properly authenticate local clients connecting to the session manager. A local attacker could possibly use this issue to execute arbitrary code as another user...

USN-8828-1: dracut vulnerabilities

It was discovered that dracut created initramfs images with overly permissive permissions under certain circumstances. A local attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 16.04 LTS. CVE-2016-8637 It was discovered that dracut did not...

USN-8827-1: Erlang vulnerabilities

It was discovered that the Erlang Port Mapper Daemon did not properly handle slow connections. A remote attacker could possibly use this issue to cause a denial of service. CVE-2026-42792 It was discovered that Erlang incorrectly handled certain external term format data, leading to heap...

USN-8836-1: FreeRDP vulnerabilities

It was discovered that FreeRDP contained multiple security issues. An attacker could possibly use these issues to obtain sensitive information, cause FreeRDP to crash, resulting in a denial of service, or execute arbitrary code...

USN-8834-1: Exim vulnerabilities

It was discovered that Exim had an out-of-bounds write when Proxy-Protocol was used with an attacker-controlled proxy. A remote attacker could possibly use this issue to execute arbitrary code. CVE-2026-94054 It was discovered that Exim had a use-after-free when certain non-default TLS settings...

USN-8833-1: libvirt vulnerabilities

It was discovered that libvirt did not properly validate newline characters in DNS TXT record values and SRV record attributes in its virtual network driver. A local attacker with permission to define virtual networks could possibly use this issue to inject arbitrary dnsmasq configuration...

USN-8831-1: libvirt vulnerabilities

It was discovered that libvirt had an integer overflow vulnerability in the NodeGetFreePages RPC handler. A local attacker could possibly use this issue to cause a denial of service or execute arbitrary code. CVE-2026-18917 It was discovered that libvirt did not correctly handle symbolic links wh...

USN-8826-1: LXC vulnerabilities

Maher Azzouzi discovered that LXC did not correctly handle logging certain failure messages. An attacker could possibly use this issue to leak 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-2022-4795...

USN-8825-1: Requests vulnerability

It was discovered that Requests did not correctly handle generating random temporary file paths. An attacker could possibly use this issue to execute arbitrary code...

USN-8729-5: Linux kernel (AWS FIPS) vulnerabilities

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: - ARM32 architecture; - ARM64 architecture; - PowerPC architecture; - Compute Acceleration Framework; - Drivers core;...

USN-8819-2: Linux kernel vulnerabilities

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: - Network file system NFS server daemon; - IPv6 networking; - Netfilter; CVE-2025-38724, CVE-2026-53131, CVE-2026-532...

USN-8730-6: Linux kernel (Intel IoTG) vulnerability

A security issue was discovered in the Linux kernel. An attacker could possibly use this to compromise the system. This update corrects flaws in the following subsystems: - IPv6 networking; - Netfilter;...

USN-8818-2: Linux kernel (IBM) vulnerabilities

It was discovered that some Arm processors could complete a broadcast translation lookaside buffer TLB invalidation before memory writes made through the invalidated translation were globally observed. A local attacker could possibly use this to write to memory after permission to do so had been...

USN-8824-1: libpcap vulnerability

It was discovered that libpcap did not properly validate BPF instructions in some situation. An attacker could possibly use this issue to perform out of bound memory operations...

USN-8823-1: PyJWT vulnerabilities

It was discovered that PyJWT incorrectly handled certain URIs when using PyJWKClient. A remote attacker could possibly use this issue to perform server-side request forgery SSRF or expose sensitive local files. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 26.04 LTS...

USN-8822-1: Libwebsockets vulnerabilities

It was discovered that Libwebsockets incorrectly handled certain SSH protocol messages in its SSH protocol handler. A remote attacker could possibly use this issue to cause Libwebsockets to consume excessive resources, resulting in a denial of service. CVE-2026-10650 It was discovered that...

USN-8820-1: curl vulnerabilities

Eunsoo Kim discovered that curl incorrectly handled SASL negotiation for LDAP authentication in certain circumstances. A machine-in-the-middle attacker could possibly use this issue to bypass peer validation. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. CVE-2026-13608 Stephan...

USN-8821-1: OpenStack Swift vulnerability

It was discovered that OpenStack Swift incorrectly handled truncated aws-chunked PUT request bodies in its s3api middleware. An authenticated attacker could possibly use this issue to cause OpenStack Swift to use excessive resources, leading to a denial of service...

USN-8819-1: Linux kernel vulnerabilities

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: - Network file system NFS server daemon; - IPv6 networking; - Netfilter; CVE-2025-38724, CVE-2026-53131, CVE-2026-532...

USN-8818-1: Linux kernel vulnerabilities

It was discovered that some Arm processors could complete a broadcast translation lookaside buffer TLB invalidation before memory writes made through the invalidated translation were globally observed. A local attacker could possibly use this to write to memory after permission to do so had been...

USN-8817-1: Linux kernel vulnerabilities

It was discovered that some Arm processors could complete a broadcast translation lookaside buffer TLB invalidation before memory writes made through the invalidated translation were globally observed. A local attacker could possibly use this to write to memory after permission to do so had been...

USN-8816-1: Linux kernel vulnerabilities

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: - ARM64 architecture; - S390 architecture; - x86 architecture; - DRBD Distributed Replicated Block Device drivers; -...

USN-8815-1: libass vulnerabilities

It was discovered that libass incorrectly handled parsing operations for specific nested character strings. An attacker could use this issue to cause libass to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS,...