Threat Pulse 62High
Public Linux local-root exploit (ZDI-CAN-33367, skb_zerocopy)
Severity 6ActivereportedWeb servers and gateways

Local user can alter read-only files via the kernel networking stack; public exploit raises shared-hosting risk. Who is affected: Linux shared hosting and multi-user systems.

What to do: Apply distro kernel updates when released; limit local shell access Oct 26: Sysdig and THN: working public root exploit for ZDI-CAN-33367 (a gap in the Dirty Frag fix), root confirmed on Ubuntu, Debian and AlmaLinux; no CVE, no merged fix. Restrict unprivileged user namespaces.

· 12 days ago · Linux shared hosting and multi-user systems
On X
@DailyDarkWebverifiedOct 24, 03:25 UTC

Public Linux local-root exploit raises shared-hosting risk ZDI-CAN-33367 targets skb_zerocopy() in the kernel networking stack, letting a local user alter read-only file data through the page cache and gain root. * CloudLinux in

Open on X
@sysdigverifiedOct 26, 17:56 UTC

A working root exploit for a Linux kernel bug is public. No CVE. No merged fix. ZDI-CAN-33367 is a gap in the Dirty Frag fix, with root confirmed on current Ubuntu, Debian, and AlmaLinux.

Open on X
Why this score

Rubric score (impact, exploitability, critical sector, unresolved); the other session's Grok score was 6, capped by the verified-lane rules at 6.

Time of the earliest verified post; the event itself may be earlier that day.

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Updated Nov 5, 01:45 UTC. Refreshes on its own.

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