CVE-2026-72257
Description
In the Linux kernel, the following vulnerability has been resolved: ASoC: qcom: q6apm: fix NULL pointer dereference in graph_callback When q6apm_free_fragments() is called it frees rx_data.buf/tx_data.buf and sets them to NULL under graph->lock. A late DSP buffer-done response can race with this: graph_callback() passes the !graph->ar_graph guard (not yet NULL), acquires the lock, but then dereferences a now-NULL buf pointer to read buf[token].phys, crashing at virtual address 0x10. Add a NULL check for buf inside the mutex-protected section in both the write-done (DATA_CMD_RSP_WR_SH_MEM_EP_DATA_BUFFER_DONE_V2) and read-done (DATA_CMD_RSP_RD_SH_MEM_EP_DATA_BUFFER_V2) handlers and bail out cleanly if buffers have already been freed. This problem is only shown up recently while apr bus was updated to process the commands per service rather from single global queue.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://git.kernel.org/stable/c/214af790e3a33ab73587de4c925c60a550eae9c6
- https://git.kernel.org/stable/c/2c715f8a1e644ce4c3e8be5b0fd3f1f4704b73b3
- https://git.kernel.org/stable/c/2e9261761b35f0b67b7487688cd1365f535be0b3
- https://git.kernel.org/stable/c/a164e744d8de1c41049bd9a1452a4b6bbf5bd8bc
- https://git.kernel.org/stable/c/ca028334343a140efda4b22e53cbce2c5e94a489
- https://git.kernel.org/stable/c/ec369eac0795cfa8f4d3a0cd35a1e8e15f780331
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.