Description
CVE-2026-43284 is a Linux kernel page-cache write vulnerability in the IPsec/xfrm subsystem affecting ESP (Encapsulating Security Payload) fragmentation. Dubbed "DirtyFrag", the bug allows a local unprivileged user to gain write access to read-only page-cache pages by triggering a race condition in how the kernel handles shared fragments when processing ESP-encapsulated UDP packets. The exploit overwrites a SUID binary on disk to execute an arbitrary payload as root.
Module options
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
msf > use exploit/linux/local/cve_2026_43284_dirty_fragmsf undefined(cve_2026_43284_dirty_frag) > show actions ...actions...msf undefined(cve_2026_43284_dirty_frag) > set ACTION < action-name >msf undefined(cve_2026_43284_dirty_frag) > show options ...show and set options...msf undefined(cve_2026_43284_dirty_frag) > runPrioritise with Active Threat Intelligence
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