Threats Tagged 'ghsa-f5hr-qj5q-hc8f'
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Threats Tagged 'ghsa-f5hr-qj5q-hc8f'
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A vulnerability in the Linux kernel's BPF subsystem involving tailcall compatibility and enforcement of expected_attach_type has been resolved. The issue arises from an uninitialized pointer in the bpf_prog_test_run_xdp() function, leading to a NULL pointer dereference when accessing the txq member of the xdp_buff structure. The flaw involves improper enforcement of expected_attach_type constraints during tailcalls between BPF programs, potentially allowing invalid access patterns. The fix enforces expected_attach_type checks in __bpf_prog_map_compatible() for tailcall maps to prevent violations. This vulnerability affects the kernel's BPF subsystem and related program types that rely on expected_attach_type for access control. Join the discussion | GCVE Database | 11/12/2025, 12:30:27 UTC Added: 07/30/2026, 15:50:46 UTC |
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