CVE-2026-98034

The Linux kernel contains a vulnerability where the BPF verifier fails to mark a register as precise when it is known to contain zero during a scalar store into an untrusted kptr field. Because check_map_kptr_access() does not mark the register as precise, a state checkpoint with an imprecise zer...

CVE-2026-98034 bpf: Mark NULL kptr stores precise

In the Linux kernel, the following vulnerability has been resolved: bpf: Mark NULL kptr stores precise checkmapkptraccess permits a scalar store into an untrusted kptr field only when the register is known to contain zero. Unlike other verifier checks whose outcome depends on a scalar value, it...