CVE-2026-74720 - bpf: Preserve pointer state for commuted arithmetic
Brief
CVE ID : CVE-2026-74720
Published : Aug. 22, 2026, 4:16 p. m.
- 4 hours, 54 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved:
bpf: Preserve pointer state for commuted arithmetic
When scalar += pointer is handled in adjust_ptr_min_max_vals(), the destination register inherits the pointer state from the source pointer. Copying only selected fields is fragile because pointer provenance is tracked by several bpf_reg_state fields.
Use the caller's temporary offset register to preserve the scalar operand while replacing the destination with the full pointer state. This preserves the frame number for PTR_TO_STACK registers and keeps parent identity fields consistent.
Severity: 0.0