PoC for CVE-2026-80521 Is Public; Ubuntu Fixes Underway for Some Packages
Researchers at DepthFirst published exploit source code for a Linux kernel flaw. Canonical still lists the vulnerability as unfixed for some Ubuntu packages.
Tag Linux
CISA Adds Three Linux Kernel Flaws to Actively Exploited Vulnerabilities
CISA has recorded active exploitation of three Linux kernel flaws. U.S. federal civilian agencies have until September 21, 2026, to remediate and conduct forensic triage of affected assets.
CISA Adds Linux CVE-2026-53266 to Actively Exploited Vulnerabilities List
CISA added an ebtables SNAT vulnerability in the Linux kernel to its KEV catalog. Organizations should review affected configurations and deploy fixes from vendors.
Qubes OS Addresses QSB-118 Vulnerability That Could Lead to dom0 Takeover
Security bulletin QSB-118 warns of a flaw when transferring a file from dom0 to a malicious qube. Under certain conditions, it allows an arbitrary command to be executed in dom0.
AB 1856: California Legislature Approves Bill With Open-Source Software Exemption
The California Legislature approved AB 1856, which would exempt software distributed with rights to copy, redistribute, and modify it from age-signal requirements. The bill is not yet law.