Linux Kernel BPF print_bpf_insn information disclosure

Summaryinfo

A vulnerability was found in Linux Kernel and classified as problematic. Impacted is the function print_bpf_insn of the component BPF. Such manipulation leads to information disclosure. This vulnerability is listed as CVE-2026-72402. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Linux Kernel (the affected version is unknown) and classified as problematic. Affected by this issue is the function print_bpf_insn of the component BPF. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: bpf: Mask pseudo pointer values in verifier logs print_bpf_insn() masks ldimm64 immediates for pointer-bearing pseudo sources when pointer leaks are not allowed, but the mask only covers BPF_PSEUDO_MAP_FD and BPF_PSEUDO_MAP_VALUE. BPF_PSEUDO_MAP_IDX, BPF_PSEUDO_MAP_IDX_VALUE, and BPF_PSEUDO_BTF_ID can also be resolved to kernel pointer values before the verifier log prints the instruction. Include them in the existing pointer classification so the log prints 0x0 instead of the rewritten address.

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2026-72402 since 08/09/2026. The exploitation is known to be easy. The attack may be launched remotely. Additional levels of successful authentication are necessary for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/15/2026). This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

Applying the patch 1c53d16b174dd9e02243fc0e85089e2aa6a0d21a/72a85e9464a5332fb2cd7efd26d9295275ceda2d is able to eliminate this problem.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

License

• open-source

Website

• Vendor: https://www.kernel.org/

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