# CVE-2024-42151: bpf: mark bpf_dummy_struct_ops.test_1 parameter as nullable

CVE-2024-42151 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-42151, released July 30, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-42151
- Priority: Routine
- CVSS: 5.5 (Moderate)
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 30, 2024
- Weakness: NULL Pointer Dereference
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-42151

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.9.9-1 | [DEBIAN-CVE-2024-42151](https://patchblox.com/security/data/fix/linux/debian-cve-2024-42151.md) | Jul 30, 2024 |
| Linux | linux Debian 14 | 6.9.9-1 | [DEBIAN-CVE-2024-42151](https://patchblox.com/security/data/fix/linux/debian-cve-2024-42151.md) | Jul 30, 2024 |

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