CVE-2026-93170 is a vulnerability in Linux Kernel
Published on September 17, 2026
dmaengine: xilinx_dma: Fix channel idle state management in AXIDMA and MCDMA interrupt handlers
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.
Products Associated with CVE-2026-93170
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Affected Versions
Linux:- Version c0bba3a99f0709c24c2c7ada7cb098966b1d791f and below 7f4b989d7d87381927b98d64492f8dcf979f57ab is affected.
- Version c0bba3a99f0709c24c2c7ada7cb098966b1d791f and below 5459e02707b27a964ae72e028d3ff72a3b687c4a is affected.
- Version c0bba3a99f0709c24c2c7ada7cb098966b1d791f and below 425630e9eea1f9f8912b8c6abf01e0dab1e27917 is affected.
- Version c0bba3a99f0709c24c2c7ada7cb098966b1d791f and below fdaf297ab275c6efecac5e87669c31bc89b74297 is affected.
- Version c0bba3a99f0709c24c2c7ada7cb098966b1d791f and below c27d16fd2358b2fc3e1ffaca03afd11dc28630ea is affected.
- Version c0bba3a99f0709c24c2c7ada7cb098966b1d791f and below ec927657524be4438447944a58173c7baf7f2384 is affected.
- Version c0bba3a99f0709c24c2c7ada7cb098966b1d791f and below c3e943490ced0b9ad475844eda7661f6a9bcfb4a is affected.
- Version c0bba3a99f0709c24c2c7ada7cb098966b1d791f and below 0b6d055edb55ecadadf54e930c2b4fab76fa9a5a is affected.
- Version 4.7 is affected.
- Before 4.7 is unaffected.
- Version 5.10.270, <= 5.10.* is unaffected.
- Version 5.15.221, <= 5.15.* is unaffected.
- Version 6.1.188, <= 6.1.* is unaffected.
- Version 6.6.157, <= 6.6.* is unaffected.
- Version 6.12.110, <= 6.12.* is unaffected.
- Version 6.18.52, <= 6.18.* is unaffected.
- Version 7.2.6, <= 7.2.* is unaffected.
- Version 7.3-rc1, <= * is unaffected.