Linux Kernel up to 7.1.5/7.2-rc4 BPF JIT Compiler bpf_jit_free memory leak

Summaryinfo

A vulnerability labeled as problematic has been found in Linux Kernel up to 7.1.5/7.2-rc4. This affects the function bpf_jit_free of the component BPF JIT Compiler. Executing a manipulation can lead to memory leak. This vulnerability is registered as CVE-2026-68285. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 7.1.5/7.2-rc4 and classified as problematic. This vulnerability affects the function bpf_jit_free of the component BPF JIT Compiler. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: LoongArch: BPF: Fix memory leak in bpf_jit_free() When bpf_int_jit_compile() is called for subprograms, it returns early during the first pass (!prog->is_func || extra_pass is false), keeping ctx->offset alive for the subsequent extra pass. If JIT compilation fails for a later subprogram, the BPF core aborts and calls bpf_jit_free() to clean up the first subprogram. However, bpf_jit_free() fails to free jit_data->ctx.offset, which causes a memory leak of the JIT context offsets array. So fix this by adding the missing kvfree(jit_data->ctx.offset) in bpf_jit_free().

The advisory is available at git.kernel.org. This vulnerability was named CVE-2026-68285 since 07/30/2026. The exploitation appears to be easy. The attack can be initiated remotely. The exploitation requires an enhanced level of successful authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 7.1.6 or 7.2-rc5 eliminates this vulnerability. Applying the patch f1557e0a64736b63aed24e285108a7bc3b7de294/47e20d4b3da97ef3881d1e55e43545c22424f3fc is able to eliminate this problem.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 7.1.0
• 7.1.1
• 7.1.2
• 7.1.3
• 7.1.4
• 7.1.5
• 7.2-rc1
• 7.2-rc2
• 7.2-rc3
• 7.2-rc4

License

• open-source

Website

• Vendor: https://www.kernel.org/

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