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Vulnerabilities CVE-2026-43306

CVE-2026-43306

None
Open
TLP:CLEAR

bpf: crypto: Use the correct destructor kfunc type

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Description

In the Linux kernel, the following vulnerability has been resolved: bpf: crypto: Use the correct destructor kfunc type With CONFIG_CFI enabled, the kernel strictly enforces that indirect function calls use a function pointer type that matches the target function. I ran into the following type mismatch when running BPF self-tests: CFI failure at bpf_obj_free_fields+0x190/0x238 (target: bpf_crypto_ctx_release+0x0/0x94; expected type: 0xa488ebfc) Internal error: Oops - CFI: 00000000f2008228 [#1] SMP ... As bpf_crypto_ctx_release() is also used in BPF programs and using a void pointer as the argument would make the verifier unhappy, add a simple stub function with the correct type and register it as the destructor kfunc instead.

Details

EPSS Score
0.12%

2.3th percentile

Confidence
90%
Published
May 8, 2026
Last Modified
May 9, 2026
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