USN-8580-2: AccountsService vulnerabilities

USN-8580-1 fixed vulnerabilities in AccountsService. This update provides the corresponding fixes for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. Original advisory details: It was discovered that the Ubuntu-specific SetLanguage patch to AccountsService incorrectly...

USN-8582-1: jbig2dec vulnerabilities

Zeng Yunxiang and Song Jiaxuan discovered that jbig2dec had an out-of-bounds read vulnerability in its command-line tool. An attacker could possibly use this issue to cause jbig2dec to crash, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS. CVE-2023-46361 It was...

USN-8581-1: libarchive vulnerabilities

It was discovered that libarchive did not properly manage memory when unpacking certain RAR5 archives, leading to a double free. An attacker could possibly use this issue to cause a denial of service. CVE-2026-14164 It was discovered that libarchive did not properly validate certain tar archives,...

USN-8580-1: AccountsService vulnerabilities

It was discovered that the Ubuntu-specific SetLanguage patch to AccountsService incorrectly handled dropping privileges. A local attacker could use this issue to execute arbitrary commands as an administrator. CVE-2026-61897 It was discovered that the Ubuntu-specific SetLanguage helpers for...

USN-8579-1: snapd vulnerabilities

James Henstridge discovered that snapd's default apparmor template did not restrict access to systemd-userdbd varlink interface. A local attacker could possibly use this issue to obtain sensitive information. CVE-2024-5300 Qualys discovered that snap-confine can be tricked to create...

USN-8578-1: CUPS control character injection vulnerability

It was discovered that CUPS did not properly filter control characters in IPP string attributes and PPD keywords. An unauthenticated attacker could exploit this to execute arbitrary code as the lp user on systems with shared target queues...

USN-8577-1: OpenSSH vulnerability

USN-8222-1 fixed a vulnerability in OpenSSH. This update provides the corresponding fix for Ubuntu 16.04 LTS. Original advisory details: Vladimir Tokarev discovered that OpenSSH incorrectly handled certificates with the principal name containing a comma character when using user-trusted CA keys i...

USN-8576-1: Linux kernel (NVIDIA Tegra) vulnerabilities

Maxim Suhanov discovered that the NTFS file system implementation in the Linux kernel did not properly validate file name length in certain situations, leading to an out-of-bounds read. An attacker could use this to construct a malicious NTFS image that, when mounted and operated on, could expose...

USN-8575-1: Linux kernel vulnerabilities

Maxim Suhanov discovered that the NTFS file system implementation in the Linux kernel did not properly validate file name length in certain situations, leading to an out-of-bounds read. An attacker could use this to construct a malicious NTFS image that, when mounted and operated on, could expose...

USN-8574-1: Linux kernel (GCP FIPS) vulnerabilities

It was discovered that some AMD processors did not properly clear data in the floating point divider unit during speculative execution. A local attacker could use this to expose sensitive information. CVE-2025-54505 It was discovered that some AMD Zen 2 processors did not properly isolate shared...

USN-8558-1: ImageMagick vulnerabilities

It was discovered that ImageMagick did not limit mutual references between MVG files. An attacker could possibly use this issue to cause a stack overflow, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.0...

USN-8563-2: nginx regression

USN-8563-1 fixed vulnerabilities in nginx. One of the fixes introduced ABI changes that could cause issues with external modules. This update reverts the fix for CVE-2026-42533 pending further investigation. We apologize for the inconvenience. Original advisory details: It was discovered that ngi...

USN-8573-1: libde265 vulnerabilities

It was discovered that libde265 did not properly manage memory under certain circumstances. An attacker could possibly use this issue to cause libde265 to crash, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS. CVE-2023-51792 It was discovered that libde265 did not...

USN-8572-1: Wget vulnerability

It was discovered that Wget did not properly validate the IP address provided in an FTP PASV response when operating in FTP passive mode. A remote attacker controlling a malicious FTP server, or an HTTP server that redirects to an FTP URL, could possibly use this issue to redirect Wget's data...

USN-8571-1: Apache HTTP Server vulnerabilities

Pavel Kohout and Arkadi Vainbrand discovered that Apache HTTP Server incorrectly handled certain memory operations in modauthnsocache. A remote attacker could possibly use this issue to cause a denial of service. CVE-2026-33007 Haruki Oyama, Merih Mengisteab, and Dawit Jeong discovered that Apach...

USN-8569-1: Linux kernel (HWE) vulnerabilities

It was discovered that some AMD processors did not properly clear data in the floating point divider unit during speculative execution. A local attacker could use this to expose sensitive information. CVE-2025-54505 It was discovered that some AMD Zen 2 processors did not properly isolate shared...

USN-8570-1: 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: - Foo-over-UDP FOU; - ARM64 architecture; - x86 architecture; - Block layer subsystem; - Drivers core; - Null block...

USN-8568-1: Linux kernel (OEM) 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-8567-1: Linux kernel vulnerabilities

It was discovered that some AMD processors did not properly clear data in the floating point divider unit during speculative execution. A local attacker could use this to expose sensitive information. CVE-2025-54505 It was discovered that some AMD Zen 2 processors did not properly isolate shared...

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...