CVE-2026-93045 bpf: Reject arena frees below the arena base

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject arena frees below the arena base bpfarenafreepages accepts scalar arena addresses. The runtime masks the address to the low 32 bits and reconstructs a full user address from the arena base before returning the range t...

PT-2026-94843

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the bpf arena free pages function where scalar arena addresses are processed by masking the address to the low 32 bits and reconstructing a full user address from the...