CVE-2026-63864: Linux

High severity, CVSS 8.4. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: bpf: Propagate error from visit_tailcall_insn Commit e40f5a6bf88a ("bpf: correct stack liveness for tail calls") added visit_tailcall_insn() but did not check its return value.

Affected products

• Linux Linux: from 6.19, before 7.0.10 (fixed in 7.0.10)

Published 2026-07-19. Last modified 2026-07-27.