{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-42120", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-29T15:50:41.178Z", "datePublished": "2024-07-30T07:46:12.136Z", "dateUpdated": "2026-08-05T11:35:47.547Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:35:47.547Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Check pipe offset before setting vblank\n\npipe_ctx has a size of MAX_PIPES so checking its index before accessing\nthe array.\n\nThis fixes an OVERRUN issue reported by Coverity." } ], "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 code is reached only through the local DRM device node `/dev/dri/cardN` — `DRM_IOCTL_WAIT_VBLANK`/`CRTC_QUEUE_SEQUENCE` or an atomic commit requesting a vblank event drives `amdgpu_dm_crtc_enable_vblank`/`disable_vblank`. There is no network or adjacent-network exposure.\nAC:L - On affected hardware the bad index is fully deterministic — `info->src_id` is a hardcoded 0 in the dce60 VUPDATE table entries, so `dc_interrupt_to_irq_source()` always returns `DC_IRQ_SOURCE_INVALID` and `pipe_offset` always wraps to 178; there is no race, no timing window, and no memory-layout precondition needed to reach the out-of-bounds access, which the attacker triggers at will by toggling vblank.\nPR:L - `drm_wait_vblank_ioctl` is registered with flags `0` (no DRM_AUTH, DRM_MASTER, or DRM_ROOT_ONLY), so any unprivileged local process holding an open handle to the card node — which the seat user gets automatically via logind ACLs, or any member of the `video` group — can drive the vblank refcount into this path. No root or capability is required.\nUI:N - The attacking process issues the vblank ioctl itself and the vblank-disable path invokes `amdgpu_dm_crtc_set_vupdate_irq()` unconditionally; no action by another user or victim is needed.\nS:U - The out-of-bounds access and its consequences are confined to the kernel's own memory and the amdgpu driver's security authority; no VM, hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - The read is roughly 400–700 KB past the six-element `pipe_ctx[]` array — far from a strictly bounded few-byte overread — and pulls an arbitrary quadword out of neighbouring kernel allocations; that value is used as the `tg` pointer and its contents feed `arm_vert_intr()` register programming, so it is an unbounded kernel-memory disclosure primitive rather than a small bounded leak.\nI:H - On the enable path the out-of-bounds value is treated as a `struct timing_generator *` and dereferenced twice with an indirect call — `tg->funcs->arm_vert_intr(tg, 2)` — giving a control-flow hijack primitive if the memory ~178 pipe_ctx entries past the array can be groomed, and the resulting hardware register writes are driven from that attacker-uninfluenced object.\nA:H - `dc_state` is `kvzalloc`'d and therefore vmalloc-backed with guard pages at this size, so indexing hundreds of kilobytes past `res_ctx.pipe_ctx[]` reads unmapped memory and oopses, and any wild `tg` value that survives the load is then dereferenced and called, panicking the kernel; the attacker can repeat the trigger arbitrarily." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/amd/display/dc/irq/dce110/irq_service_dce110.c" ], "versions": [ { "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "b2e9abc95583ac7bbb2c47da4d476a798146dfd6", "status": "affected", "versionType": "git" }, { "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "0b3702f9d43d163fd05e43b7d7e22e766dbef329", "status": "affected", "versionType": "git" }, { "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "d2c3645a4a5ae5d933b4116c305d9d82b8199dbf", "status": "affected", "versionType": "git" }, { "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "96bf81cc1bd058bb8af6e755a548e926e934dfd1", "status": "affected", "versionType": "git" }, { "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "c5ec2afeeee4c91cebc4eff6d4f1ecf4047259f4", "status": "affected", "versionType": "git" }, { "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "5396a70e8cf462ec5ccf2dc8de103c79de9489e6", "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/gpu/drm/amd/display/dc/irq/dce110/irq_service_dce110.c" ], "versions": [ { "version": "4.15", "status": "affected" }, { "version": "0", "lessThan": "4.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.222", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.163", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.98", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.39", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9.9", "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": "4.15", "versionEndExcluding": "5.10.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "5.15.163" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.1.98" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.6.39" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.9.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.10" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/b2e9abc95583ac7bbb2c47da4d476a798146dfd6" }, { "url": 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