CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's bpf subsystem, specifically in the handling of memory frees within the bpf arena. An attacker could exploit this flaw to manipulate memory allocations, potentially leading to unauthorized access to memory regions below the arena mapping. System administrators and developers utilizing the Linux kernel should prioritize patching this vulnerability to mitigate risks associated with memory corruption and potential privilege escalation.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Reject arena frees below the arena base bpf_arena_free_pages() 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 to the arena free tree. When the scalar value is below the low 32 bits of the arena base, full_uaddr falls below user_vm_start. The existing upper-end clipping then turns this into an out-of-range free-tree offset. A later allocation can reuse that offset and return an address below the arena mapping. Reject such frees before computing the clipped range.