CVE-2007-2453: The random number feature in Linux kernel 2.6 before 2.6.20.13, and 2.6.21.x before 2.6.21.4, (1) does not...

Security readout for executives and security teams

This is an old Linux kernel random-number weakness. On systems without enough entropy, the kernel could generate repeated random values after reboot. That can undermine cryptographic secrets or tokens created at boot. The bundle provides no active exploitation evidence and no CVSS score. Exposure is limited to legacy Linux systems in the named kernel ranges, especially embedded, virtual, headless, or appliance-like systems with weak entropy at boot. Current supported distributions are unlikely to be affected unless running old kernels or vendor-frozen images. Treat as a legacy exposure review item, not an emergency incident from the supplied evidence. Prioritize any affected internet-facing appliances, embedded systems, or systems that generated long-lived cryptographic material while running vulnerable kernels. Mitigation focus: Upgrade kernels before 2.6.20.13 to a vendor-fixed release.; Upgrade 2.6.21.x kernels before 2.6.21.4 to a fixed release.; Apply relevant distribution advisories from Ubuntu, Debian, SUSE, Red Hat, or Mandriva..

Prepared

Jun 29, 2026, 05:15 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.