Bug 2536236 (CVE-2026-92519)

Summary: CVE-2026-92519 kernel: riscv, bpf: Fix memory leak in bpf_jit_free
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel. When the BPF Just-In-Time (JIT) compiler processes subprograms, a memory leak can occur. If JIT compilation fails for a subprogram, the `bpf_jit_free()` function does not properly free the associated memory for the JIT context offsets array. This can lead to a gradual consumption of system memory, potentially impacting system stability and availability.
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Description OSIDB Bzimport 2026-09-17 17:02:12 UTC 
In the Linux kernel, the following vulnerability has been resolved:

riscv, 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.

Fix this by adding the missing kfree(jit_data->ctx.offset) in
bpf_jit_free().
Comment 1 gkamathe 2026-09-21 05:34:19 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-92519.mbox