CVE-2026-68228media: chips-media: wave5: Move src_buf Removal to finish_encode

Official description

In the Linux kernel, the following vulnerability has been resolved: media: chips-media: wave5: Move src_buf Removal to finish_encode During encoder processing, there is a case where the IRQ response could return the buffer back to userspace via v4l2_m2m_buf_done call. In this time, userspace could queue up this same buffer before start_encode removes the index from the ready queue. This would then lead to a case where the buffer in the ready queue could be a self loop due to the WRITE_ONCE(prev->next, new) call in __list_add. When __list_del is finally called, the loop is already made so nothing points back to ready queue list head and pointers are poisoned. A buffer should not be marked as DONE before the buffer is removed from m2m ready queue. Move removal entirely to finish_encode.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/1ee2b2b189ddc7b23c8eee1145de42b8bd19fb06
• https://git.kernel.org/stable/c/f24ca8b53fe15db40957bdaa40c9aa68e1557bbe
• https://git.kernel.org/stable/c/d681227ce43bfd74b6eb69beecd9b0bec1fd8b48
• https://git.kernel.org/stable/c/b20157147089a9c16a38c7810e2fe6f2df8e3277