{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-40991", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-12T12:17:45.605Z", "datePublished": "2024-07-12T12:37:35.138Z", "dateUpdated": "2026-08-05T11:34:29.218Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:34:29.218Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: ti: k3-udma-glue: Fix of_k3_udma_glue_parse_chn_by_id()\n\nThe of_k3_udma_glue_parse_chn_by_id() helper function erroneously\ninvokes \"of_node_put()\" on the \"udmax_np\" device-node passed to it,\nwithout having incremented its reference count at any point. Fix it." } ], "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 vulnerable helper is only reachable from the k3-udma-glue channel-request API invoked during driver probe on TI K3 SoCs; there is no network, packet-receive, or remote-peer data path to it. Repetition requires local actions such as driver bind/unbind or module reload, so local access is the applicable vector.\nAC:L - The unbalanced of_node_put() executes unconditionally on every call path, success and failure alike, with no race to win and no memory-layout precondition the attacker cannot influence. Each invocation — including every deferred-probe retry — deterministically drops one reference.\nPR:L - No capability check, credential test, or access-control gate exists anywhere between the entry point and the underflow, and the reference is dropped automatically during boot-time probe without any privileged action being needed to create the condition. Choosing the higher-severity reading, a basic local user rather than real root is treated as sufficient.\nUI:N - The refcount underflow happens inside the driver's own probe/channel-request flow with no victim action required — no filesystem mount, file open, or device attach by another user is part of the trigger.\nS:U - The corrupted object is a kernel OF device_node, and all consequences — the erroneous release, the refcount saturation warning, and any subsequent use-after-free — remain within the kernel's own security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The immediate of_node_release() failure path dumps a kernel stack trace exposing addresses and symbols, and on DT-overlay-based K3 platforms the premature refcount-zero permits the node to be freed while still referenced, yielding a use-after-free read primitive over device_node contents. Per use-after-free guidance this is High.\nI:H - A device_node freed while other subsystems retain pointers is a classic heap-spray target whose properties, full_name, and data pointers are written through, converting the underflow into an arbitrary-write and control-flow-hijack primitive. Use-after-free is scored High for integrity.\nA:H - The underflow reaches refcount_warn_saturate() with the \"refcount_t: underflow; use-after-free\" splat, which is a fatal panic under panic_on_warn or CONFIG_BUG_ON_DATA_CORRUPTION, and the resulting use-after-free causes kernel oopses even when not weaponized." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/dma/ti/k3-udma-glue.c" ], "versions": [ { "version": "81a1f90f20af71728f900f245aa69e9425fdef84", "lessThan": "a5ab5f413d1e4c7ed5f64271b025f0726374509e", "status": "affected", "versionType": "git" }, { "version": "81a1f90f20af71728f900f245aa69e9425fdef84", "lessThan": "ba27e9d2207784da748b19170a2e56bd7770bd81", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/dma/ti/k3-udma-glue.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" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/a5ab5f413d1e4c7ed5f64271b025f0726374509e" }, { "url": "https://git.kernel.org/stable/c/ba27e9d2207784da748b19170a2e56bd7770bd81" } ], "title": "dmaengine: ti: k3-udma-glue: Fix of_k3_udma_glue_parse_chn_by_id()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T04:39:56.059Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/a5ab5f413d1e4c7ed5f64271b025f0726374509e", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/ba27e9d2207784da748b19170a2e56bd7770bd81", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-40991", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T17:01:48.045329Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:20.263Z" } } ] } }