USN-8566-1: Linux kernel vulnerabilities

It was discovered that some AMD Zen 2 processors did not properly isolate shared resources in the operation cache. A local attacker could possibly use this issue to corrupt instructions executed at a higher privilege level, resulting in privilege escalation. CVE-2025-54518 Several security issues...

USN-8565-1: SQLite vulnerabilities

It was discovered that SQLite did not properly handle NULL pointer dereferences in the Session Extension when applying a corrupt changeset. An attacker could possibly use this issue to cause SQLite to crash, resulting in a denial of service. CVE-2026-50812 It was discovered that SQLite had a buff...

USN-8564-1: PHP vulnerabilities

It was discovered that PHP incorrectly handled certain TLS setup failures, resulting in a NULL pointer dereference. An attacker could possibly use this issue to cause PHP to crash, resulting in a denial of service. This issue only affected Ubuntu 26.04 LTS. CVE-2026-12184 It was discovered that P...

USN-8560-1: libXfont vulnerabilities

It was discovered that libXfont incorrectly handled scaling bitmap fonts, leading to a heap buffer overflow. An attacker able to access the X server could use this issue to cause libXfont to crash, resulting in a denial of service, or possibly execute arbitrary code. CVE-2026-56001 It was...

USN-8559-1: rlottie vulnerabilities

It was discovered that rlottie incorrectly handled certain shift operations. An attacker could possibly use this issue to cause rlottie to read out of bounds, resulting in a denial of service or exposing sensitive information. CVE-2026-10305 It was discovered that rlottie did not properly limit...

USN-8563-1: nginx vulnerabilities

It was discovered that nginx incorrectly handled certain map directives using regex matching and capture variables. A remote attacker could use this issue to cause nginx to crash, resulting in a denial of service, or possibly execute arbitrary code. CVE-2026-42533 It was discovered that nginx had...

USN-8562-1: FreeType vulnerability

It was discovered that FreeType incorrectly handled certain variable font files. An attacker could possibly use this issue to cause FreeType to crash, resulting in a denial of service, or obtain sensitive information...

USN-8561-1: 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-8490-2: Linux kernel (Real-time) 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; - Block layer subsystem; - Cryptographic API; - DMA engine subsystem; - InfiniBand drivers; -...

USN-8490-1: 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; - Block layer subsystem; - Cryptographic API; - DMA engine subsystem; - InfiniBand drivers; -...

USN-8477-2: tar regression

USN-8477-1 fixed a vulnerability in tar. The update introduced a regression that could cause tar to fail to extract certain valid files. This update fixes the problem. Original advisory details: It was discovered that tar incorrectly handled certain crafted archive files. An attacker could possib...

USN-8557-1: Authlib vulnerabilities

Jay Neiva and Mauro Carrillo discovered that Authlib did not properly validate cryptographic keys embedded in JWT headers. An attacker could possibly use this issue to forge trusted tokens, resulting in authentication and authorization bypass. CVE-2026-27962 Jay Neiva and Mauro Carrillo discovere...

USN-8556-1: Ruby vulnerabilities

It was discovered that the Net::IMAP client in Ruby did not properly sanitize Symbol arguments passed to IMAP commands. A remote attacker controlling a malicious IMAP server, or able to influence command arguments, could use this to inject arbitrary IMAP commands via CRLF sequences. CVE-2026-4225...

USN-8555-1: Ubuntu Advantage Tools (pro client) vulnerabilities

Bilal Teke discovered that Ubuntu Advantage Tools exposed the Pro bearer token in command-line arguments when validating APT credentials. A local attacker could possibly use this issue to obtain sensitive information and gain unauthorized access to Ubuntu Pro repositories. CVE-2026-9494 Frederick...

USN-8554-1: NTFS-3G vulnerabilities

It was discovered that NTFS-3G had a heap buffer overflow when reading certain NTFS images. A local attacker could possibly use this issue to execute arbitrary code. CVE-2026-42616 It was discovered that NTFS-3G had multiple heap buffer overflows when processing certain NTFS images. A local...

USN-8553-1: .NET vulnerabilities

Artur Stetsko discovered that the .NET did not properly validate authentication data. An attacker could possibly use this issue to elevate privileges. CVE-2026-47300 Levi Broderick discovered that .NET did not properly handle XML encryption during parsing. An attacker could possibly use this issu...

USN-8552-1: Sympa vulnerability

It was discovered that Sympa did not properly validate input on the generic SSO login. A remote attacker could possibly use this issue to perform a path traversal attack and gain unintended access...

USN-8551-1: Tomcat vulnerabilities

It was discovered that Tomcat incorrectly handled authorization when multiple method constraints defined the same HTTP method. A remote attacker could possibly use this issue to bypass authorization restrictions. CVE-2026-43515 It was discovered that the Tomcat number guess example application di...

USN-8550-1: libslirp vulnerability

It was discovered that libslirp incorrectly handled TCP urgent data. A privileged attacker inside a guest VM could possibly use this issue to obtain sensitive information from the host process memory...

USN-8549-1: idna vulnerability

It was discovered that idna did not properly reject oversized inputs before performing expensive processing. An attacker could possibly use this issue to cause idna to consume significant resources, leading to a denial of service...

USN-8548-1: Linux kernel vulnerabilities

It was discovered that a logic flaw existed in the XFRM ESP-in-TCP subsystem in the Linux kernel when handling socket buffer fragments. This flaw is known as Fragnesia. A local attacker could use this to escalate privileges, or possibly escape a container. CVE-2026-43503 Several security issues...

USN-8547-1: 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: - RISC-V architecture; - Cryptographic API; - InfiniBand drivers; - IOMMU subsystem; - Network drivers; -...

USN-8546-1: Linux kernel (Raspberry Pi) 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; - Block layer subsystem; - Cryptographic API; - DMA engine subsystem; - InfiniBand drivers; -...

USN-8545-1: Linux kernel (HWE) 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; - Block layer subsystem; - Cryptographic API; - DMA engine subsystem; - InfiniBand drivers; -...

USN-8544-1: LuaJIT vulnerabilities

It was discovered that LuaJIT incorrectly handled certain inputs. An attacker could possibly use these issues to cause a crash, resulting in a denial of service, or execute arbitrary code...

USN-8543-1: Wget vulnerabilities

It was discovered that Wget mishandled semicolons in the userinfo subcomponent of a URL. A remote attacker could possibly use this issue to trick a user into connecting to a different host than intended. This issue only affected Ubuntu 14.04 LTS. CVE-2024-38428 It was discovered that Wget...

USN-8542-1: Dnsmasq vulnerabilities

Yiwei Hou discovered that Dnsmasq incorrectly handled logging of DS or DNSKEY. A remote attacker could possibly use this issue to cause a denial of service. CVE-2026-12725 It was discovered that Dnsmasq incorrectly validated the length of fixed-length DNS record fields when parsing NS section...

USN-8526-2: libheif vulnerabilities

USN-8526-1 fixed vulnerabilities in libheif. This update provides the corresponding updates for CVE-2026-47709 and CVE-2026-47714 in Ubuntu 24.04 LTS. Original advisory details: Junyi Liu discovered that libheif had a null pointer dereference in its image tiling interface. An attacker could...

USN-8541-1: Vim vulnerabilities

Hirohito Higashi discovered that Vim incorrectly escaped class or trait names when performing PHP omni-completion. An attacker could possibly use this issue to trick a user into opening a specially crafted PHP file and executing arbitrary commands. This issue only affected Ubuntu 22.04 LTS, Ubunt...

USN-8540-1: OpenVPN vulnerabilities

It was discovered that OpenVPN had a 1-byte buffer overrun when handling NTLMv2 proxy responses. An attacker could use this issue to cause a denial of service or possibly execute arbitrary code. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. CVE-2026-11771 It was discovered that...

USN-8539-1: GnuTLS vulnerabilities

Haruto Kimura discovered that GnuTLS did not properly apply permitted name constraints in certain certificate validation paths. A remote attacker could possibly use this issue to bypass certificate validation, leading to a machine-in-the-middle attack. CVE-2026-42011 Oleh Konko discovered that...

USN-8538-1: alsa-lib vulnerability

It was discovered that alsa-lib incorrectly handled certain ALSA configuration text. An attacker could use this issue to cause alsa-lib to crash, resulting in a denial of service, or possibly execute arbitrary code...

USN-8537-1: httplib2 vulnerability

It was discovered that httplib2 performed unbounded decompression of HTTP response bodies when the server used gzip or deflate Content-Encoding. A remote attacker could possibly use this issue to cause httplib2 to use excessive resources, leading to a denial of service...

USN-8536-1: MariaDB vulnerabilities

It was discovered that MariaDB did not properly validate parameters supplied by a joiner node during a State Snapshot Transfer using the mariabackup method. An attacker could possibly use this issue to execute arbitrary shell commands on the donor node. CVE-2026-44168 It was discovered that Maria...

USN-8535-1: PipeWire vulnerabilities

It was discovered that PipeWire accepted unbounded Content-Length values in its RAOP module. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 24.04 LTS. CVE-2026-14324 It was discovered that PipeWire performed multiple unbounded stack...

USN-8534-1: LibreOffice vulnerabilities

It was discovered that LibreOffice incorrectly handled importing DXF drawings. An attacker could use this issue to cause LibreOffice to crash, resulting in a denial of service, or possibly execute arbitrary code. CVE-2026-6039 It was discovered that LibreOffice incorrectly handled certain ODF...

USN-8533-1: OpenSSH vulnerabilities

It was discovered that OpenSSH sftp did not properly constrain the location of downloaded files when connecting to an attacker-controlled server. An attacker could possibly use this issue to write files to unintended locations on the file system. CVE-2026-59995 It was discovered that OpenSSH scp...

USN-8532-1: libssh2 vulnerabilities

It was discovered that libssh2 incorrectly handled certain publickey subsystem attributes. A remote attacker controlling a malicious SSH server could use this issue to cause a denial of service or possibly execute arbitrary code. CVE-2026-58050 It was discovered that libssh2 did not properly...

USN-8496-3: cifs-utils vulnerability

USN-8496-1 fixed vulnerabilities in cifs-utils. The update caused a regression and was backed out in USN-8496-2. This update reintroduces the security fix, along with a fix for the regression. Original advisory details: It was discovered that cifs-utils incorrectly dropped root privileges before...

USN-8531-1: libexif vulnerabilities

It was discovered that libexif had an integer overflow in its MakerNote decoder when called with a zero-length buffer. An attacker could possibly use this issue to cause a denial of service or obtain sensitive information. CVE-2026-32775 It was discovered that libexif had an integer overflow in i...

USN-8530-1: Linux kernel (AWS) vulnerabilities

It was discovered that the Linux kernel did not properly handle shared page fragments during socket buffer operations, collectively known as Dirty Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the RxRPC networking subsystem when processing paged fragments. A local attacker...

USN-8529-1: Linux kernel vulnerabilities

It was discovered that a logic flaw existed in the XFRM ESP-in-TCP subsystem in the Linux kernel when handling socket buffer fragments. This flaw is known as Fragnesia. A local attacker could use this to escalate privileges, or possibly escape a container. CVE-2026-43503 Several security issues...

USN-8528-1: Linux kernel (Xilinx ZynqMP) vulnerabilities

It was discovered that the Linux kernel algifaead module did not properly handle in-place cryptographic operations. This flaw is known as Copy Fail. A local attacker could use this to escalate privileges, or possibly escape a container. CVE-2026-31431 It was discovered that the Linux kernel did n...

USN-8527-1: Linux kernel (Raspberry Pi) 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: - RISC-V architecture; - Cryptographic API; - InfiniBand drivers; - IOMMU subsystem; - Network drivers; -...

USN-8492-5: 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: - ARM64 architecture; - MIPS architecture; - PowerPC architecture; - x86 architecture; - Block layer subsystem; -...

USN-8526-1: libheif vulnerabilities

Xianrui Dong discovered that libheif had an out-of-bounds read in its HEIF sequence track parser. An attacker could possibly use this issue to cause a denial of service or obtain sensitive information. This issue only affected Ubuntu 26.04 LTS. CVE-2026-47254 Junyi Liu discovered that libheif had...

USN-8525-1: curl vulnerabilities

Harry Sintonen discovered that curl incorrectly handled credentials when following HTTP redirects in conjunction with .netrc files. An attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 18.04 LTS...

USN-8524-1: Python vulnerability

It was discovered that Python did not use sufficient entropy for Expat hash-flooding protection in the xml.parsers.expat and xml.etree.ElementTree modules. An attacker could use this to cause a denial of service via a crafted XML document...

USN-8523-1: libsoup vulnerabilities

Eric Su and Samuel Dainard discovered that libsoup incorrectly handled content with zero-length resources. An attacker could possibly use this issue to trigger a buffer over-read, resulting in information disclosure or a denial of service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04...

USN-8522-1: LibRaw vulnerabilities

It was discovered that LibRaw incorrectly handled certain Nikon RAW image files. An attacker could possibly use this issue to cause LibRaw to crash, resulting in a denial of service. CVE-2026-5342 It was discovered that LibRaw had an integer overflow in its DNG image loader. An attacker could...