Vendor advisories

Ubuntu Security Notices

Browse 390 advisories from this official source. Search by product, CVE, severity, or advisory ID.

Current Checked 12 minutes ago Checked every 15 minutes

390 advisories

Each date says whether the vendor published or updated the bulletin. A vendor bulletin describes products that may be affected. It does not prove that the vulnerable product or version is installed in your environment.

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Ubuntu Security NoticesUSN-8818-1
Severity not listed

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 permiss...

Vendor guidance

This update corrects flaws in the following subsystems: - ARM64 architecture; - InfiniBand drivers; - Network drivers; - TCM subsystem; - exFAT file system; - Network file system (NFS) client; - Network file system (N...

Ubuntu Security NoticesUSN-8817-1
Severity not listed

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 permiss...

Vendor guidance

This update corrects flaws in the following subsystems: - ARM64 architecture; - InfiniBand drivers; - Network drivers; - TCM subsystem; - B.A.T.M.A.N.

Ubuntu Security NoticesUSN-8816-1
Severity not listed

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 Bloc...

Vendor guidance

This update corrects flaws in the following subsystems: - ARM64 architecture; - S390 architecture; - x86 architecture; - DRBD Distributed Replicated Block Device drivers; - InfiniBand drivers; - IOMMU subsystem; - Mul...

Ubuntu Security NoticesUSN-8813-1
Severity not listed

USN-8813-1: Expat vulnerabilities

It was discovered that Expat did not correctly handle certain integer arithmetic. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-56406, CVE-2026-56407, CVE-2026-56409, CVE-2026-56410, CVE-2026-56411) It was discovered that Expat did not corre...

Ubuntu Security NoticesUSN-8812-1
Severity not listed

USN-8812-1: GDAL vulnerabilities

It was discovered that GDAL incorrectly handled certain netCDF files. An attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-49014) It was discovered that GDAL incorrectl...

Ubuntu Security NoticesUSN-8811-1
Severity not listed

USN-8811-1: urllib3 vulnerability

It was discovered that urllib3 did not correctly strip sensitive HTTP headers during cross-origin redirects. An attacker could possibly use this issue to leak sensitive information.

Ubuntu Security NoticesUSN-8810-1
Severity not listed

USN-8810-1: ImageMagick vulnerabilities

It was discovered that ImageMagick did not correctly handle certain memory operations. An attacker could possibly use this issue to cause a denial of service. This issue affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubunt...

Ubuntu Security NoticesUSN-8287-2
Severity not listed

USN-8287-2: XDG Desktop Portal regression

USN-8287-1 fixed a vulnerability in XDG Desktop Portal. Unfortunately the fix for CVE-2026-40354 was incomplete and introduced a regression when trashing files. This update fixes the problem and provides the corresponding update for Ubuntu 26.04 LTS. We apologize for the incon...

Vendor guidance

USN-8287-1 fixed a vulnerability in XDG Desktop Portal.

Ubuntu Security NoticesUSN-8809-1
Severity not listed

USN-8809-1: libgit2 vulnerability

Kazuma Matsumoto and Isabel Mill discovered that libgit2 incorrectly handled certain repository URLs when using the SSH transport. A remote attacker could possibly use this issue to execute arbitrary commands.

Ubuntu Security NoticesUSN-8808-1
Severity not listed

USN-8808-1: SQL parse vulnerabilities

It was discovered that SQL parse contained multiple algorithmic complexity flaws when parsing SQL statements with deeply nested parentheses, comments, or dollar-quoted string literals. An attacker could use this issue to cause SQL parse to consume excessive CPU resources, resu...

Ubuntu Security NoticesUSN-8807-1
Severity not listed

USN-8807-1: Open-iSNS vulnerability

It was discovered that Open-iSNS contained a double-free vulnerability when decoding malformed iSNS attributes. An unauthenticated attacker could possibly use this to cause a denial of service.

Ubuntu Security NoticesUSN-8805-1
Severity not listed

USN-8805-1: Moodle vulnerability

It was discovered that Moodle did not properly restrict URLs. An authenticated user could possibly use this issue to perform a server-side request forgery attack and expose sensitive information.

Ubuntu Security NoticesUSN-8806-1
Severity not listed

USN-8806-1: NetworkManager vulnerability

It was discovered that NetworkManager did not properly restrict the ca-path and phase2-ca-path certificate authority settings for private (single-user) 802.1X network connections. An attacker could use this issue to point their own private 802.1X connection profile at a direct...

Ubuntu Security NoticesUSN-8733-2
Severity not listed

USN-8733-2: Gzip vulnerabilities

USN-8733-1 fixed vulnerabilities in Gzip. This update provides the corresponding fix for Gzip on Ubuntu 14.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. Original advisory details: Michał Majchrowicz and Marcin Wyczechowski discovered that Gzip's gzexe utility created temporar...

Vendor guidance

USN-8733-1 fixed vulnerabilities in Gzip.

Ubuntu Security NoticesUSN-8804-1
Severity not listed

USN-8804-1: OpenSSH vulnerabilities

Florian Kohnhäuser discovered that OpenSSH incorrectly handled shell metacharacters in certain usernames. An attacker could possibly use this issue to execute arbitrary commands when certain non-default configurations were used, resulting in arbitrary code execution. This issu...

Ubuntu Security NoticesUSN-8803-1
Severity not listed

USN-8803-1: Sudo vulnerability

Guannan Wang, Zhanpeng Liu, and Guancheng Li discovered that Sudo failed to apply intercept policy checks when commands were executed under certain circumstances. A local attacker permitted to run specific commands could possibly use this issue to bypass policy enforcement and...

Ubuntu Security NoticesUSN-8802-1
Severity not listed

USN-8802-1: Linux kernel (Oracle) 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 Framew...

Vendor guidance

This update corrects flaws in the following subsystems: - ARM32 architecture; - ARM64 architecture; - PowerPC architecture; - Compute Acceleration Framework; - Drivers core; - Bluetooth drivers; - Arm Firmware Framewo...

Ubuntu Security NoticesUSN-8728-2
Severity not listed

USN-8728-2: Linux kernel (Azure) 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 permiss...

Vendor guidance

This update corrects flaws in the following subsystems: - x86 platform drivers; - ARM64 architecture; - Cryptographic API; - PSP security protocol; - User-space API (UAPI); - Kernel build system; - ARM32 architecture;...

Ubuntu Security NoticesUSN-8726-4
Severity not listed

USN-8726-4: 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 permiss...

Vendor guidance

This update corrects flaws in the following subsystems: - ARM64 architecture; - User-space API (UAPI); - Kernel build system; - ARM32 architecture; - RISC-V architecture; - S390 architecture; - x86 architecture; - Blo...

Ubuntu Security NoticesUSN-8729-4
Severity not listed

USN-8729-4: Linux kernel (Low Latency) 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 Framew...

Vendor guidance

This update corrects flaws in the following subsystems: - ARM32 architecture; - ARM64 architecture; - PowerPC architecture; - Compute Acceleration Framework; - Drivers core; - Bluetooth drivers; - Arm Firmware Framewo...

Ubuntu Security NoticesUSN-8730-5
Severity not listed

USN-8730-5: Linux kernel 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;

Vendor guidance

This update corrects flaws in the following subsystems: - IPv6 networking; - Netfilter;

Ubuntu Security NoticesUSN-8793-2
Severity not listed

USN-8793-2: Linux kernel (Azure CVM) 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: - Bluetooth drivers; - GPU drivers; - Hardware monitoring drivers; - SPI subsystem; - NTFS3 file ...

Vendor guidance

This update corrects flaws in the following subsystems: - Bluetooth drivers; - GPU drivers; - Hardware monitoring drivers; - SPI subsystem; - NTFS3 file system; - io_uring subsystem; - Ethernet bridge; - Multipath TCP...

Before you act

Start with the vendor's bulletin.

We normalize the fields that vendors publish so you can search and compare advisories in one place. We do not replace the original bulletin or turn a product-name match into proof that a system is vulnerable.

Confirm the installed product and version, read the linked vendor guidance, and test the recommended update or mitigation through your normal change process.

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