In the Linux kernel, the following vulnerability has been resolved:

net/sched: cake: reject overhead values that underflow length

CAKE accepts signed overhead values and stores them in an s16, but the
adjusted packet length calculation uses unsigned arithmetic.  A negative
effective length can therefore wrap to a large value.

Such configurations make rate accounting depend on integer wraparound
rather than on the packet size userspace intended to model.  A static
netlink lower bound is not enough because packets reaching CAKE can be
smaller than any reasonable manual-overhead allowance.

Fold the signed overhead adjustment into the existing datapath MPU clamp
so negative adjusted lengths are clamped before link-layer framing
adjustments.

https://git.kernel.org/stable/c/297f459865360b46a887667cbf3aac6a6f013841

https://git.kernel.org/stable/c/336c1e414fc0e9844d445174e8ada2a7dd8d1c4b

https://git.kernel.org/stable/c/7aa0e64fea778a9e3df73e64da95367ff8ad2ea5

https://git.kernel.org/stable/c/b7f97cae7ec1b6c3c32843c42be218690d310467

https://git.kernel.org/stable/c/bcdf3a3664f7d2c4e37e155f30f72ef33f041804

https://git.kernel.org/stable/c/e1df6cff03aad8c96e55a8b2a991e505c7a3ff6f

https://git.kernel.org/stable/c/f1e7807df5bf2d42a40266430e9f82f37633cdcf

https://git.kernel.org/stable/c/f511dd7bf6077aa7afbe72914520553fedaacbb4

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