Description

In the Linux kernel, the following vulnerability has been resolved:

bpf: mark bpf_dummy_struct_ops.test_1 parameter as nullable

Test case dummy_st_ops/dummy_init_ret_value passes NULL as the first
parameter of the test_1() function. Mark this parameter as nullable to
make verifier aware of such possibility.
Otherwise, NULL check in the test_1() code:

SEC("struct_ops/test_1")
int BPF_PROG(test_1, struct bpf_dummy_ops_state *state)
{
if (!state)
return ...;

... access state ...
}

Might be removed by verifier, thus triggering NULL pointer dereference
under certain conditions.

Classification

CVE ID: CVE-2024-42151

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 11.66% (scored less or equal to compared to others)

EPSS Date: 2025-02-15 (when was this score calculated)

References

https://git.kernel.org/stable/c/7f79097b0de97a486b137b750d7dd7b20b519d23
https://git.kernel.org/stable/c/1479eaff1f16983d8fda7c5a08a586c21891087d

Timeline