BELL-CVE-2026-63864 CVE-2026-63864 does not affect BellSoft software

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Linux Distros Unpatched Vulnerability : CVE-2026-63864

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In the Linux kernel, the following vulnerability has been resolved: bpf: Propagate error from visittailcallinsn Commit e40f5a6bf88a bpf: correct stack liveness...

UBUNTU-CVE-2026-63864

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

DEBIAN-CVE-2026-63864

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

CVE-2026-63864

The CVE affects the Linux kernel BPF tail-call path. Root cause: visit_tailcall_insn() was added without checking its return value, creating an unchecked error path in tail calls. A fix was applied in commit e40f5a6bf88a to correct stack liveness and propagate the error from visit_tailcall_insn()...