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USN-8763-1: kitty vulnerabilities

Ubuntu patches three kitty terminal flaws including remote command execution via crafted escape sequences.

Ubuntu Security Notice USN-8763-1 fixes multiple vulnerabilities in the kitty terminal emulator. CVE-2026-42850 allows a remote attacker to execute arbitrary commands via improperly escaped error messages triggered by crafted terminal escape sequences. CVE-2026-42851 enables arbitrary code execution with the user's privileges through mishandled remote edit requests in terminal output. CVE-2026-54055 lets a local attacker overwrite arbitrary files via destination paths in kitty's file transmission protocol.

Ubuntu Security Notices · 1d agoAdvisoryCVE-2026-42850CVE-2026-42851CVE-2026-54055

USN-8753-1: libinput vulnerability

Ubuntu patches libinput flaw letting local attackers inject udev properties and execute arbitrary code as root.

USN-8753-1 fixes a libinput vulnerability where device properties are not properly escaped. A local attacker could inject arbitrary udev properties and execute arbitrary code as root, a full local privilege escalation on affected Linux desktop systems. Ubuntu shipped updated packages.

Ubuntu Security Notices · 2d agoAdvisory

USN-8741-1: Flatpak vulnerabilities

Ubuntu patched two Flatpak flaws, including a sandbox escape via app-controlled symlinks allowing host code execution (CVE-2026-34078).

Ubuntu security notice USN-8741-1 fixes two Flatpak vulnerabilities in Ubuntu 20.04 LTS, 22.04 LTS, and 24.04 LTS. CVE-2026-34078 stems from improper path validation in sandbox-expose options, letting a malicious or compromised Flatpak app use app-controlled symlinks to access arbitrary host files and gain code execution in the host context. CVE-2026-34079 involves improper path validation when removing outdated ld.so cache files, allowing a compromised app to delete arbitrary files on the host.

Ubuntu Security Notices · 6d agoAdvisoryCVE-2026-34078CVE-2026-34079

PostgreSQL Fixes 12-Year-Old Logical Decoding Flaw Enabling Replication-Role Code Execution

PostgreSQL fixed CVE-2026-6471 (CVSS 7.2), a 12-year-old logical decoding flaw letting replication-role accounts execute arbitrary code as the database OS user.

PostgreSQL patched CVE-2026-6471 (CVSS 7.2), a flaw present since logical decoding shipped in 9.4 (2014) that lets an account with the REPLICATION attribute run arbitrary code as the database server's OS user when wal_level is logical. Versions before 18.6, 17.11, 16.15, 15.19, and 14.24 are affected; exploitation requires such an account, which backup, CDC, and monitoring tooling routinely holds. The fix adds an output_plugin_libraries whitelist, so administrators using non-default plugins such as wal2json and decoderbufs must add them and reload configuration after updating. Cyera Research, whose write-up names the flaw PostGREShell, demonstrated escalating a replication user to superuser with persistence; no PoC or KEV entry existed as of September 4.

The Hacker News · 12d agoVulnerabilityCVE-2026-64711