CVE-2026-72474
dmaengine: dma-axi-dmac: use DMA pool to manange DMA descriptor
Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: dma-axi-dmac: use DMA pool to manange DMA descriptor For architectures like Microblaze or arm64 (where this IP is used), DMA_DIRECT_REMAP is set which means that dma_alloc_coherent() might remap (and hence vmalloc()) some memory. This became visible in a design where dma_direct_use_pool() is not possible. With the above, when calling dma_free_coherent(), vunmap() would be called from softirq context and thus leading to a BUG(). To fix it, use a dma pool that is allocated in .device_alloc_chan_resources() and allocate blocks from it. The key point is that now dma_pool_free() is used in axi_dmac_free_desc() to free the blocks and that just frees the blocks from the pool in the sense they can be used again. In other words, no actual call to dma_free_coherent() happens. That only happens when destroying the pool in axi_dmac_free_chan_resources() which does not happen in any interrupt context.
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 17, 2026, 6:19 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Apply the provided kernel patch or update.
- Use DMA pools for descriptor management.
- Allocate blocks from the DMA pool.
- Free blocks using dma_pool_free().
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-72474.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72474 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-72474
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-72474 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72474 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3f8fd25936ee5f52596f10d420f650c5b5e3285f', 'lessThan': 'a4f41ceecfe68e117bae9c76c5ebc5e2b353fa56', 'versionType': 'git'}, {'status': 'affected', 'version': '3f8fd25936ee5f52596f10d420f650c5b5e3285f', 'lessThan': 'c0e6bb2b0408fcac6382158ee2bd9fdc45eceee9', 'versionType': 'git'}, {'status': 'affected', 'version': '3f8fd25936ee5f52596f10d420f650c5b5e3285f', 'lessThan': '65e82fa24965b2eb6ad9412f6c530ed9a50a625f', 'versionType': 'git'}, {'status': 'affected', 'version': '3f8fd25936ee5f52596f10d420f650c5b5e3285f', 'lessThan': '9e942c8579130e62734c14338e9f451780669164', 'versionType': 'git'}], 'programFiles': ['drivers/dma/dma-axi-dmac.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/dma/dma-axi-dmac.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3f8fd25936ee5f52596f10d420f650c5b5e3285f', 'lessThan': 'a4f41ceecfe68e117bae9c76c5ebc5e2b353fa56', 'versionType': 'git'}, {'status': 'affected', 'version': '3f8fd25936ee5f52596f10d420f650c5b5e3285f', 'lessThan': 'c0e6bb2b0408fcac6382158ee2bd9fdc45eceee9', 'versionType': 'git'}, {'status': 'affected', 'version': '3f8fd25936ee5f52596f10d420f650c5b5e3285f', 'lessThan': '65e82fa24965b2eb6ad9412f6c530ed9a50a625f', 'versionType': 'git'}, {'status': 'affected', 'version': '3f8fd25936ee5f52596f10d420f650c5b5e3285f', 'lessThan': '9e942c8579130e62734c14338e9f451780669164', 'versionType': 'git'}], 'programFiles': ['drivers/dma/dma-axi-dmac.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/dma/dma-axi-dmac.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3f8fd25936ee5f52596f10d420f650c5b5e3285f', 'lessThan': 'a4f41ceecfe68e117bae9c76c5ebc5e2b353fa56', 'versionType': 'git'}, {'status': 'affected', 'version': '3f8fd25936ee5f52596f10d420f650c5b5e3285f', 'lessThan': 'c0e6bb2b0408fcac6382158ee2bd9fdc45eceee9', 'versionType': 'git'}, {'status': 'affected', 'version': '3f8fd25936ee5f52596f10d420f650c5b5e3285f', 'lessThan': '65e82fa24965b2eb6ad9412f6c530ed9a50a625f', 'versionType': 'git'}, {'status': 'affected', 'version': '3f8fd25936ee5f52596f10d420f650c5b5e3285f', 'lessThan': '9e942c8579130e62734c14338e9f451780669164', 'versionType': 'git'}], 'programFiles': ['drivers/dma/dma-axi-dmac.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/dma/dma-axi-dmac.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: dmaengine: dma-axi-dmac: use DMA pool to manange DMA descriptor For architectures like Microblaze or arm64 (where this IP is used), DMA_DIRECT_REMAP is set which means that dma_alloc_coherent() might remap (and hence vmalloc()) some memory. This became visible in a design where dma_direct_use_pool() is not possible. With the above, when calling dma_free_coherent(), vunmap() would be called from softirq context and thus leading to a BUG(). To fix it, use a dma pool that is allocated in .device_alloc_chan_resources() and allocate blocks from it. The key point is that now dma_pool_free() is used in axi_dmac_free_desc() to free the blocks and that just frees the blocks from the pool in the sense they can be used again. In other words, no actual call to dma_free_coherent() happens. That only happens when destroying the pool in axi_dmac_free_chan_resources() which does not happen in any interrupt context. Added Reference https://git.kernel.org/stable/c/65e82fa24965b2eb6ad9412f6c530ed9a50a625f Added Reference https://git.kernel.org/stable/c/9e942c8579130e62734c14338e9f451780669164 Added Reference https://git.kernel.org/stable/c/a4f41ceecfe68e117bae9c76c5ebc5e2b353fa56 Added Reference https://git.kernel.org/stable/c/c0e6bb2b0408fcac6382158ee2bd9fdc45eceee9