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CVE-2024-42151

Disclosure Date: July 30, 2024
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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.

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CVSS V3 Severity and Metrics
Base Score:
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Impact Score:
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Vector:
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Attack Vector (AV):
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Attack Complexity (AC):
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Integrity (I):
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Availability (A):
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General Information

Vendors

  • Linux

Products

  • Linux

Additional Info

Technical Analysis