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            "url": "https://git.kernel.org/stable/c/ba27e9d2207784da748b19170a2e56bd7770bd81"
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              "content": {
                "id": "CVE-2024-40991",
                "options": [
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                    "Automatable": "no"
                  },
                  {
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          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/dma/ti/k3-udma-glue.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          "vendor": "Linux",
          "versions": [
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              "version": "6.9"
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              "status": "unaffected",
              "version": "0",
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              "version": "6.9.7",
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            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.10",
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                  "vulnerable": true
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          "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."
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            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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              "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 \u2014 including every deferred-probe retry \u2014 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\u0027s own probe/channel-request flow with no victim action required \u2014 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 \u2014 the erroneous release, the refcount saturation warning, and any subsequent use-after-free \u2014 remain within the kernel\u0027s 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."
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/ba27e9d2207784da748b19170a2e56bd7770bd81"
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      ],
      "title": "dmaengine: ti: k3-udma-glue: Fix of_k3_udma_glue_parse_chn_by_id()",
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    "cveId": "CVE-2024-40991",
    "datePublished": "2024-07-12T12:37:35.138Z",
    "dateReserved": "2024-07-12T12:17:45.605Z",
    "dateUpdated": "2026-08-05T11:34:29.218Z",
    "state": "PUBLISHED"
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