CVE-2026-43306

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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/3979a550fe06b370d73647f59cf462fa525c9ec4	Patch
https://git.kernel.org/stable/c/4e3e57dbf46dad3498f8c4219ce2dba756875962	Patch
https://git.kernel.org/stable/c/50d6fd69388cc7b05dce72f09080674dcede4ac9	Patch
https://git.kernel.org/stable/c/b40a5d724f29fc2eed23ff353808a9aae616b48a	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2026-05-08 14:16

Updated : 2026-06-17 10:49

NVD link : CVE-2026-43306

Mitre link : CVE-2026-43306

CVE.ORG link : CVE-2026-43306

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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