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CVE-2026-93170— dmaengine: xilinx_dma: Fix channel idle state management in AXIDMA and MCDMA interrupt handlers

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： DMA 引擎：xilinx_dma：修复 AXIDMA 和 MCDMA 中断处理器中的通道空闲状态管理问题 修复了 AXIDMA 和 MCDMA 中断处理程序中的竞态条件。在该问题中，当描述符仍在处理过程中时，通道可能被错误地标记为空闲，并尝试执行不必要的传输。 问题发生在以下情况： 1. 多个描述符已排队并处于活跃状态。 2. 在完成部分描述符后，中断被触发。 3. 将已完成的描述符移至 。 4. 即使 中仍包含未处理的描述符，通道仍被标记为空闲，并调用了 。 5. 这导

CVSS 7.8 · High EPSS 0.18% · P7

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux c0bba3a99f0709c24c2c7ada7cb098966b1d791f< 7f4b989d7d87381927b98d64492f8dcf979f57ab affected
c0bba3a99f0709c24c2c7ada7cb098966b1d791f< 5459e02707b27a964ae72e028d3ff72a3b687c4a affected
c0bba3a99f0709c24c2c7ada7cb098966b1d791f< 425630e9eea1f9f8912b8c6abf01e0dab1e27917 affected
c0bba3a99f0709c24c2c7ada7cb098966b1d791f< fdaf297ab275c6efecac5e87669c31bc89b74297 affected
c0bba3a99f0709c24c2c7ada7cb098966b1d791f< c27d16fd2358b2fc3e1ffaca03afd11dc28630ea affected
c0bba3a99f0709c24c2c7ada7cb098966b1d791f< ec927657524be4438447944a58173c7baf7f2384 affected
c0bba3a99f0709c24c2c7ada7cb098966b1d791f< c3e943490ced0b9ad475844eda7661f6a9bcfb4a affected
c0bba3a99f0709c24c2c7ada7cb098966b1d791f< 0b6d055edb55ecadadf54e930c2b4fab76fa9a5a affected
… +10 more rows
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I. Basic Information for CVE-2026-93170

Vulnerability Information
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Vulnerability Title
dmaengine: xilinx_dma: Fix channel idle state management in AXIDMA and MCDMA interrupt handlers
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: xilinx_dma: Fix channel idle state management in AXIDMA and MCDMA interrupt handlers Fix a race condition in AXIDMA and MCDMA irq handlers where the channel could be incorrectly marked as idle and attempt spurious transfers when descriptors are still being processed. The issue occurs when: 1. Multiple descriptors are queued and active. 2. An interrupt fires after completing some descriptors. 3. xilinx_dma_complete_descriptor() moves completed descriptors to done_list. 4. Channel is marked idle and start_transfer() is called even though active_list still contains unprocessed descriptors. 5. This leads to premature transfer attempts and potential descriptor corruption or missed completions. Only mark the channel as idle and start new transfers when the active list is actually empty, ensuring proper channel state management and avoiding spurious transfer attempts.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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 c0bba3a99f0709c24c2c7ada7cb098966b1d791f ~ 7f4b989d7d87381927b98d64492f8dcf979f57ab -
Linux Linux 4.7 -

II. Public POCs for CVE-2026-93170

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III. Intelligence Information for CVE-2026-93170

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Patches & Fixes for CVE-2026-93170 (8)

Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total

CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90379 8.8 HIGH wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete
CVE-2026-90371 8.8 HIGH wifi: mt76: fix RXDMAD_C buffer recycling race

Showing top 20 of 600 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-93170

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