{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-40986", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-12T12:17:45.605Z", "datePublished": "2024-07-12T12:37:31.800Z", "dateUpdated": "2026-08-05T11:34:26.008Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:34:26.008Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: xilinx: xdma: Fix data synchronisation in xdma_channel_isr()\n\nRequests the vchan lock before using xdma->stop_request." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The race is driven through local client interfaces of the XDMA dmaengine provider — ALSA PCM trigger-stop/hw_free and V4L2 stop/DMA-timeout paths on /dev/snd/pcmC* and /dev/video* — which require local access to the system. There is no remote or network-facing path into drivers/dma/xilinx/xdma.c.\nAC:L - The attacker controls the terminate side of the race (issuing stream stop/STREAMOFF or PCM stop whenever it chooses) and can influence the interrupt side by selecting transfer/period sizes, and the attempt can be repeated indefinitely at no cost until the unlocked stop_requested read is mistimed.\nPR:L - Only an unprivileged local account with ordinary access to the audio or video device node backed by the XDMA channels is needed — no capabilities or root, since dmaengine_terminate_*/dmaengine_synchronize are invoked on behalf of normal PCM/V4L2 operations.\nUI:N - The attacker triggers the start/stop transfer cycle entirely on its own; no action by another user or administrator is required.\nS:U - The corruption occurs in kernel memory (dma_pool descriptor blocks and client DMA buffers) managed by the same kernel security authority; no VM, sandbox, or IOMMU boundary is crossed.\nC:H - Losing the last-interrupt synchronization lets descriptor blocks and data buffers be freed and reused while the PCIe engine is still reading them, so card-to-host and host-to-card transfers can expose recycled kernel memory contents to the device and to subsequent users of those pages.\nI:H - The DMA engine can continue writing into freed/recycled dma_pool memory and follow stale or attacker-groomed descriptor contents, giving a memory-corruption write primitive against arbitrary kernel-mapped memory that is a classic path to control-flow hijack.\nA:H - The same use-after-free of live descriptor blocks reliably produces kernel memory corruption and oops/panic, and the missed completion also stalls xdma_synchronize() on its one-second timeout on every terminate." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/dma/xilinx/xdma.c" ], "versions": [ { "version": "6a40fb8245965b481b4dcce011cd63f20bf91ee0", "lessThan": "8e1f54e4a3f3207c9dc68bb5000603b75802e7f0", "status": "affected", "versionType": "git" }, { "version": "6a40fb8245965b481b4dcce011cd63f20bf91ee0", "lessThan": "462237d2d93fc9e9221d1cf9f773954d27da83c0", "status": "affected", "versionType": "git" }, { "version": "582ce5d734190d74e5ce9cd711cf6e964e1e7b29", "status": "affected", "versionType": "git" }, { "version": "6.8.9", "lessThan": "6.9", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/dma/xilinx/xdma.c" ], "versions": [ { "version": "6.9", "status": "affected" }, { "version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver" }, { "version": "6.9.7", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.9.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8.9" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/8e1f54e4a3f3207c9dc68bb5000603b75802e7f0" }, { "url": "https://git.kernel.org/stable/c/462237d2d93fc9e9221d1cf9f773954d27da83c0" } ], "title": "dmaengine: xilinx: xdma: Fix data synchronisation in xdma_channel_isr()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T04:39:55.848Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/8e1f54e4a3f3207c9dc68bb5000603b75802e7f0", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/462237d2d93fc9e9221d1cf9f773954d27da83c0", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-40986", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T17:02:03.948638Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:20.818Z" } } ] } }