security_identifier

CVE-2026-81000 (TUNderflow)

Identifier for an integer underflow in the Linux kernel's TUN/TAP receive-headroom handling that leaves packet data written past the socket buffer head, known as TUNderflow.

Known aliases

TUNderflow

Relationships

No evidence-backed relationships are recorded.

Current clusters

security1 publisher

Disabling unprivileged user namespaces stops three of four new Linux local-root bugs

Fixes are in for four Linux local-root bugs found in code more than a decade old. Turning off unprivileged user namespaces closes three of them. The fourth stays open.

Publishers:heyitsas.im

Reality

Evidence58
Adoption32
Hype gap+12
Incentives55
Confidence55