Bug 2513418 (CVE-2026-68285) - CVE-2026-68285 kernel: LoongArch: BPF: Fix memory leak in bpf_jit_free()
Summary: CVE-2026-68285 kernel: LoongArch: BPF: Fix memory leak in bpf_jit_free()
Keywords:
Status: NEW
Alias: CVE-2026-68285
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-10 12:36 UTC by OSIDB Bzimport
Modified: 2026-08-11 14:20 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2026-08-10 12:36:13 UTC
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().

Comment 1 Mauro Matteo Cascella 2026-08-11 14:19:46 UTC
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081026-CVE-2026-68285-b4c3@gregkh/T


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