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        "cveId": "CVE-2024-42275",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-07-30T07:40:12.261Z",
        "datePublished": "2024-08-17T08:54:28.902Z",
        "dateUpdated": "2026-08-05T11:36:15.323Z"
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                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/client: Fix error code in drm_client_buffer_vmap_local()\n\nThis function accidentally returns zero/success on the failure path.\nIt leads to locking issues and an uninitialized *map_copy in the\ncaller."
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                        "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"
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                        {
                            "lang": "en",
                            "value": "AV:L - The vulnerable path is reached only through local interfaces — writes/mmap to the fbdev device node or console output driving the damage worker, plus DRM GEM allocations to induce the vmap/pin failure. There is no remote or adjacent-network input.\nAC:L - Both preconditions are under the attacker's control: the failing `drm_gem_vmap()` is reliably produced by exhausting system memory or VRAM through the render node, and the damage blit is triggered on demand by writing to `/dev/fb0`. No condition depends on state the attacker cannot influence.\nPR:L - An ordinary local account with the usual graphics access (fbdev/DRM render node, e.g. the video/render/graphics groups on desktops, Android and embedded systems) suffices; no CAP_SYS_ADMIN or root is required anywhere on the path.\nUI:N - The attacker drives the entire sequence from its own process — allocate to force the vmap failure, then dirty the framebuffer; the damage worker also fires automatically on console updates. No victim action is needed.\nS:U - The corruption stays within the kernel's own security authority; there is no VM, IOMMU, or sandbox boundary crossed by the failed mapping or the reservation-lock imbalance.\nC:H - The uninitialized `iosys_map` write and the released-but-still-assumed-held reservation lock give memory corruption plus a race window where a BO can be moved/evicted mid-blit, which is leverageable for disclosure of arbitrary kernel memory.\nI:H - A loop of `memcpy` writes of fully userspace-controlled shadow-framebuffer bytes lands at an uninitialized kernel pointer (or MMIO address), which with stack grooming is an arbitrary-write primitive suitable for control-flow hijack.\nA:H - The write through the garbage pointer causes an immediate oops/panic (a guaranteed NULL-deref on `INIT_STACK_ALL_ZERO` builds), and the extra `dma_resv_unlock()` corrupts ww_mutex state, leading to warnings, stolen locks and deadlocks."
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/c0f412961653237f52e2f16ee8747fb330bcf074"
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                {
                    "url": "https://git.kernel.org/stable/c/b5fbf924f125ba3638cfdc21c0515eb7e76264ca"
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            "title": "drm/client: Fix error code in drm_client_buffer_vmap_local()",
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