CVE-2026-93170

dmaengine: xilinx_dma: Fix channel idle state management in AXIDMA and MCDMA interrupt handlers

State: Published
Severity: 7.8 High
Published: Sep 17, 2026
Updated: Oct 19, 2026
Reserved: Sep 17, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	c0bba3a99f0709c24c2c7ada7cb098966b1d791f to before 7f4b989d7d87381927b98d64492f8dcf979f57abAffected c0bba3a99f0709c24c2c7ada7cb098966b1d791f to before 5459e02707b27a964ae72e028d3ff72a3b687c4aAffected c0bba3a99f0709c24c2c7ada7cb098966b1d791f to before 425630e9eea1f9f8912b8c6abf01e0dab1e27917Affected c0bba3a99f0709c24c2c7ada7cb098966b1d791f to before fdaf297ab275c6efecac5e87669c31bc89b74297Affected c0bba3a99f0709c24c2c7ada7cb098966b1d791f to before c27d16fd2358b2fc3e1ffaca03afd11dc28630eaAffected c0bba3a99f0709c24c2c7ada7cb098966b1d791f to before ec927657524be4438447944a58173c7baf7f2384Affected c0bba3a99f0709c24c2c7ada7cb098966b1d791f to before c3e943490ced0b9ad475844eda7661f6a9bcfb4aAffected c0bba3a99f0709c24c2c7ada7cb098966b1d791f to before 0b6d055edb55ecadadf54e930c2b4fab76fa9a5aAffected
LinuxLinux	4.7Affected before 4.7Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

c0bba3a99f0709c24c2c7ada7cb098966b1d791f to before 7f4b989d7d87381927b98d64492f8dcf979f57abAffected
c0bba3a99f0709c24c2c7ada7cb098966b1d791f to before 5459e02707b27a964ae72e028d3ff72a3b687c4aAffected
c0bba3a99f0709c24c2c7ada7cb098966b1d791f to before 425630e9eea1f9f8912b8c6abf01e0dab1e27917Affected
c0bba3a99f0709c24c2c7ada7cb098966b1d791f to before fdaf297ab275c6efecac5e87669c31bc89b74297Affected
c0bba3a99f0709c24c2c7ada7cb098966b1d791f to before c27d16fd2358b2fc3e1ffaca03afd11dc28630eaAffected
c0bba3a99f0709c24c2c7ada7cb098966b1d791f to before ec927657524be4438447944a58173c7baf7f2384Affected
c0bba3a99f0709c24c2c7ada7cb098966b1d791f to before c3e943490ced0b9ad475844eda7661f6a9bcfb4aAffected
c0bba3a99f0709c24c2c7ada7cb098966b1d791f to before 0b6d055edb55ecadadf54e930c2b4fab76fa9a5aAffected

LinuxLinux

4.7Affected
before 4.7Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

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