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CVE-2026-98210— mmc: mxcmmc: cancel data work and watchdog on remove

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，已修复以下漏洞： mmc: mxcmmc：在移除设备时取消数据工作和看门狗定时器 函数通过 （设备资源管理）机制的清理流程来释放主机资源，但它以及 都没有处理驱动程序自身的异步状态。 是一个在 的 DMA 路径中被激活的 10 秒定时器，它仅在 DMA 完成路径和中断（IRQ）完成路径中被删除。然而，移除（remove）路径并未显式地清空这些状态，因此该定时器可能在主机资源已被释放之后仍然触发，并在 回调中解引用已释放的主机指针，导致危险行为。 是在 PIO（程序输入/输出）路径的中断处理程

AI Predicted 6.5 Difficulty: Theoretical EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux f6ad0a481342223b2e7ae9f55b154e14f1391ada< 740f595f8ad678cb4d79f13edd12851df2492bdd affected
f6ad0a481342223b2e7ae9f55b154e14f1391ada< d3641afe6ee76d852834a34ef0669eefced32752 affected
f6ad0a481342223b2e7ae9f55b154e14f1391ada< 314966b490323bdcfd3162a1398b00e587e0ced4 affected
f6ad0a481342223b2e7ae9f55b154e14f1391ada< ae10838a7cdf0e54caa9d0a4f488704fd04e7f01 affected
f6ad0a481342223b2e7ae9f55b154e14f1391ada< a1ff367e0dc961d73707add508a95df5c3509bd1 affected
f6ad0a481342223b2e7ae9f55b154e14f1391ada< 23383e0578b58ba2dc0730cf9f7806bd66bf859a affected
f6ad0a481342223b2e7ae9f55b154e14f1391ada< e2948c4232209e87c861a680f20f1e3cf8a57fec affected
f6ad0a481342223b2e7ae9f55b154e14f1391ada< d3a421c82412344022982d5b91ba23194a0a6f29 affected
… +10 more rows
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I. Basic Information for CVE-2026-98210

Vulnerability Information
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Vulnerability Title
mmc: mxcmmc: cancel data work and watchdog on remove
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mmc: mxcmmc: cancel data work and watchdog on remove mxcmci_remove() frees the host through the devm tail, but neither it nor mmc_remove_host() drains the driver's own asynchronous state. host->watchdog, a 10 s timer armed on the DMA path in mxcmci_setup_data(), is deleted only by the DMA- and IRQ-complete paths, which the remove path does not explicitly drain; it can therefore fire after the host is freed and dereference it in mxcmci_watchdog(). host->datawork, armed from the IRQ handler on the PIO path, is not cancelled by the remove path either. Free the devm-registered IRQ, then cancel datawork and delete the watchdog in mxcmci_remove(), before dma_release_channel(). Freeing the IRQ first keeps a trailing handler from re-arming datawork between the cancel and the host free. Both callbacks are non-self-rearming. This issue was found by an in-house static analysis tool.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux f6ad0a481342223b2e7ae9f55b154e14f1391ada ~ 740f595f8ad678cb4d79f13edd12851df2492bdd -
Linux Linux 3.7 -

II. Public POCs for CVE-2026-98210

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III. Intelligence Information for CVE-2026-98210

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Patches & Fixes for CVE-2026-98210 (7)

Same Patch Batch · Linux · 2026-10-06 · 208 CVEs total

CVE-2026-98323 9.8 CRITICAL RDMA/siw: Bound fragmented header copies by the remaining length
CVE-2026-98365 9.8 CRITICAL RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access
CVE-2026-98282 8.8 HIGH powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba
CVE-2026-98283 8.8 HIGH KVM: PPC: Book3S HV: fix use-after-free in kvmhv_emulate_tlbie_all_lpid()
CVE-2026-98339 8.8 HIGH wifi: cfg80211: don't filter by BSS type when removing stale entries
CVE-2026-98171 8.8 HIGH smb: client: fix next_buffer UAF and NextCommand bounds in compound PDUs
CVE-2026-98261 8.1 HIGH cifs: Fix server use-after-free in cifs_chan_skip_or_disable()
CVE-2026-98357 8.1 HIGH IB/isert: wait for deferred control PDU completions before releasing the connection
CVE-2026-98239 8.1 HIGH net: lan743x: fix RX checksum use-after-free
CVE-2026-98341 7.8 HIGH wifi: cfg80211: don't free driver-owned scan requests
CVE-2026-98324 7.8 HIGH dmaengine: pxa: fix double counting of the hw descriptors
CVE-2026-98228 7.8 HIGH mips: select CONFIG_WEAK_REORDERING_BEYOND_LLSC from CONFIG_EYEQ
CVE-2026-98229 7.8 HIGH xfrm: save input state data before secpath resets
CVE-2026-98320 7.8 HIGH netfilter: flowtable: hold reference on ct until flow is released
CVE-2026-98318 7.8 HIGH smb: client: validate absolute native symlink targets before NT fixups
CVE-2026-98315 7.8 HIGH ntfs: protect runlist updates with the runlist lock
CVE-2026-98260 7.8 HIGH exec: Cleanup POSIX timers right after de_thread()
CVE-2026-98256 7.8 HIGH signal: Prevent exec() race
CVE-2026-98258 7.8 HIGH posix-cpu-timers: Prevent freeing a timer which is queued on the expiry list
CVE-2026-98254 7.8 HIGH swiotlb: use the adjusted address for the highmem page lookup

Showing top 20 of 208 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98210

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