{"api_version":"1","generated_at":"2026-08-16T16:23:46+00:00","cve":"CVE-2026-72474","urls":{"html":"https://cve.report/CVE-2026-72474","api":"https://cve.report/api/cve/CVE-2026-72474.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72474","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72474"},"summary":{"title":"dmaengine: dma-axi-dmac: use DMA pool to manange DMA descriptor","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: dma-axi-dmac: use DMA pool to manange DMA descriptor\n\nFor architectures like Microblaze or arm64 (where this IP is used),\nDMA_DIRECT_REMAP is set which means that dma_alloc_coherent() might\nremap (and hence vmalloc()) some memory. This became visible in a design\nwhere dma_direct_use_pool() is not possible.\n\nWith the above, when calling dma_free_coherent(), vunmap() would be\ncalled from softirq context and thus leading to a BUG().\n\nTo fix it, use a dma pool that is allocated in\n.device_alloc_chan_resources() and allocate blocks from it. The key\npoint is that now dma_pool_free() is used in axi_dmac_free_desc() to\nfree the blocks and that just frees the blocks from the pool in the\nsense they can be used again. In other words, no actual call to\ndma_free_coherent() happens. That only happens when destroying the pool\nin axi_dmac_free_chan_resources() which does not happen in any interrupt\ncontext.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:21","updated_at":"2026-08-15 06:22:21"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/c0e6bb2b0408fcac6382158ee2bd9fdc45eceee9","name":"https://git.kernel.org/stable/c/c0e6bb2b0408fcac6382158ee2bd9fdc45eceee9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9e942c8579130e62734c14338e9f451780669164","name":"https://git.kernel.org/stable/c/9e942c8579130e62734c14338e9f451780669164","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a4f41ceecfe68e117bae9c76c5ebc5e2b353fa56","name":"https://git.kernel.org/stable/c/a4f41ceecfe68e117bae9c76c5ebc5e2b353fa56","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/65e82fa24965b2eb6ad9412f6c530ed9a50a625f","name":"https://git.kernel.org/stable/c/65e82fa24965b2eb6ad9412f6c530ed9a50a625f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72474","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72474","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3f8fd25936ee5f52596f10d420f650c5b5e3285f a4f41ceecfe68e117bae9c76c5ebc5e2b353fa56 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3f8fd25936ee5f52596f10d420f650c5b5e3285f c0e6bb2b0408fcac6382158ee2bd9fdc45eceee9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3f8fd25936ee5f52596f10d420f650c5b5e3285f 65e82fa24965b2eb6ad9412f6c530ed9a50a625f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3f8fd25936ee5f52596f10d420f650c5b5e3285f 9e942c8579130e62734c14338e9f451780669164 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"72474","cve":"CVE-2026-72474","epss":"0.002090000","percentile":"0.113190000","score_date":"2026-08-15","updated_at":"2026-08-16 00:00:31"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/dma/dma-axi-dmac.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"a4f41ceecfe68e117bae9c76c5ebc5e2b353fa56","status":"affected","version":"3f8fd25936ee5f52596f10d420f650c5b5e3285f","versionType":"git"},{"lessThan":"c0e6bb2b0408fcac6382158ee2bd9fdc45eceee9","status":"affected","version":"3f8fd25936ee5f52596f10d420f650c5b5e3285f","versionType":"git"},{"lessThan":"65e82fa24965b2eb6ad9412f6c530ed9a50a625f","status":"affected","version":"3f8fd25936ee5f52596f10d420f650c5b5e3285f","versionType":"git"},{"lessThan":"9e942c8579130e62734c14338e9f451780669164","status":"affected","version":"3f8fd25936ee5f52596f10d420f650c5b5e3285f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/dma/dma-axi-dmac.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.8"},{"lessThan":"6.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"6.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: dma-axi-dmac: use DMA pool to manange DMA descriptor\n\nFor architectures like Microblaze or arm64 (where this IP is used),\nDMA_DIRECT_REMAP is set which means that dma_alloc_coherent() might\nremap (and hence vmalloc()) some memory. This became visible in a design\nwhere dma_direct_use_pool() is not possible.\n\nWith the above, when calling dma_free_coherent(), vunmap() would be\ncalled from softirq context and thus leading to a BUG().\n\nTo fix it, use a dma pool that is allocated in\n.device_alloc_chan_resources() and allocate blocks from it. The key\npoint is that now dma_pool_free() is used in axi_dmac_free_desc() to\nfree the blocks and that just frees the blocks from the pool in the\nsense they can be used again. In other words, no actual call to\ndma_free_coherent() happens. That only happens when destroying the pool\nin axi_dmac_free_chan_resources() which does not happen in any interrupt\ncontext."}],"providerMetadata":{"dateUpdated":"2026-08-15T05:57:15.073Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/a4f41ceecfe68e117bae9c76c5ebc5e2b353fa56"},{"url":"https://git.kernel.org/stable/c/c0e6bb2b0408fcac6382158ee2bd9fdc45eceee9"},{"url":"https://git.kernel.org/stable/c/65e82fa24965b2eb6ad9412f6c530ed9a50a625f"},{"url":"https://git.kernel.org/stable/c/9e942c8579130e62734c14338e9f451780669164"}],"title":"dmaengine: dma-axi-dmac: use DMA pool to manange DMA descriptor","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72474","datePublished":"2026-08-15T05:57:15.073Z","dateReserved":"2026-08-09T03:40:39.934Z","dateUpdated":"2026-08-15T05:57:15.073Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:21","lastModifiedDate":"2026-08-15 06:22:21","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72474","Ordinal":"1","Title":"dmaengine: dma-axi-dmac: use DMA pool to manange DMA descriptor","CVE":"CVE-2026-72474","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72474","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: dma-axi-dmac: use DMA pool to manange DMA descriptor\n\nFor architectures like Microblaze or arm64 (where this IP is used),\nDMA_DIRECT_REMAP is set which means that dma_alloc_coherent() might\nremap (and hence vmalloc()) some memory. This became visible in a design\nwhere dma_direct_use_pool() is not possible.\n\nWith the above, when calling dma_free_coherent(), vunmap() would be\ncalled from softirq context and thus leading to a BUG().\n\nTo fix it, use a dma pool that is allocated in\n.device_alloc_chan_resources() and allocate blocks from it. The key\npoint is that now dma_pool_free() is used in axi_dmac_free_desc() to\nfree the blocks and that just frees the blocks from the pool in the\nsense they can be used again. In other words, no actual call to\ndma_free_coherent() happens. That only happens when destroying the pool\nin axi_dmac_free_chan_resources() which does not happen in any interrupt\ncontext.","Type":"Description","Title":"dmaengine: dma-axi-dmac: use DMA pool to manange DMA descriptor"}]}}}