CVE-2026-68228

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux9707a6254a8a6b978bde811a44fe07d86c229d1c < 1ee2b2b189ddc7b23c8eee1145de42b8bd19fb06affected
LinuxLinux9707a6254a8a6b978bde811a44fe07d86c229d1c < f24ca8b53fe15db40957bdaa40c9aa68e1557bbeaffected
LinuxLinux9707a6254a8a6b978bde811a44fe07d86c229d1c < d681227ce43bfd74b6eb69beecd9b0bec1fd8b48affected
LinuxLinux9707a6254a8a6b978bde811a44fe07d86c229d1c < b20157147089a9c16a38c7810e2fe6f2df8e3277affected
LinuxLinux6.8affected
LinuxLinux0 < 6.8unaffected
LinuxLinux6.12.101 <= 6.12.*unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References