{"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"}}]}}