CVE-2026-80556

CVE CVE-2026-80556EUVD EUVD-2026-66471Published 2026-08-26T14:37:23.000ZLast changed 2026-08-27T05:01:44.000ZCVSS 7.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: mmc: atmel-mci: Fix use-after-free in atmci_remove due to race condition In atmci_probe, &host->bh_work is bound with atmci_work_func, and atmci_interrupt, atmci_timeout_timer and atmci_dma_complete can all queue this work on system_bh_wq. If we remove the module, atmci_remove makes cleanup and the memory allocated for host with devm_kzalloc() is released after the remove callback returns, while the work mentioned above may still be pending or running. The sequence of operations that may lead to a UAF bug is as follows: CPU0 CPU1 | atmci_interrupt | queue_work(system_bh_wq, | &host->bh_work) atmci_remove | atmci_cleanup_slot(...) | atmci_writel(host, ATMCI_IDR, ~0UL) | timer_delete_sync(&host->timer) | dma_release_channel(host->dma.chan) | free_irq(platform_get_irq(pdev, 0), host) | | atmci_work_func | // use host // devm resources released after | // remove returns, host is freed | | // use host (use-after-free) Fix it by canceling the work after all the sources that can schedule it (IRQ handler, timeout timer and DMA completion callback) have been stopped, and before proceeding with the remaining cleanup in atmci_remove.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 7.2; 7d2be0749a59096a334c94dc48f43294193cb8ed <7599a73ff66d195a908f5d88b427933a9fb1c02a; 2.6.27; 7d2be0749a59096a334c94dc48f43294193cb8ed <b5060ff2f5460795a3e9f7cdf5052aa42f96ff81; patch: 7.1.10; patch: 6.12.105; patch: 6.18.46; patch: 0; 7d2be0749a59096a334c94dc48f43294193cb8ed <22aecf6c4721727a2f724ca0438bc7d4b609bf3f; 7d2be0749a59096a334c94dc48f43294193cb8ed <c125ee35a49a0518521b52b27631eef061b8719a

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

Does this concern one of your customers?

This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.

Try it for 28 days

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.