CVE-2024-42064

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There is no network or remote-peer input involved in display pipe mapping.\nAC:L - No race, timing window, or unknowable memory layout is required \u2014 the attacker can repeatedly issue atomic commits with varied stream/plane/ODM/MST configurations until a DC pipe has no corresponding DML mapping entry, and the resulting `0xFFFFFFFF` index is dereferenced unconditionally.\nPR:L - An unprivileged local user with access to the DRM primary node (the standard case for a logged-in console/desktop user via logind ACLs, or the first opener on a system with no running display server) can become DRM master and drive modesets. No root or real capability in the initial namespace is needed.\nUI:N - The attacker's own process performs the atomic modeset/plane update that triggers the faulty pipe lookup; no action by any other user is required.\nS:U - The out-of-bounds accesses and the resulting crash or data disclosure are confined to the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - `dml_get_*(mode_lib, 0xFFFFFFFF)` performs a wild read roughly 4\u201316 GiB past the `kzalloc`'d `dml2_context`, and the value fetched is used as a second unbounded array index \u2014 an entirely unconstrained out-of-bounds read whose results propagate into `pipe_ctx` DLG/RQ/TTU state, so kernel memory contents can be disclosed rather than being a small bounded read.\nI:H - Data read from arbitrary out-of-bounds kernel addresses is written back into kernel-managed display state (`pipe_dlg_param`, `det_buffer_size_kb`, DCHUB RQ/DLG/TTU register images) and programmed into the display hardware, corrupting kernel and device state with attacker-uninfluenced arbitrary values.\nA:H - The dereference of index `0xFFFFFFFF` almost always faults on an unmapped address, producing a kernel oops inside the atomic commit tail while DC/DRM locks are held \u2014 crashing the task, wedging the display subsystem, and commonly taking down the machine."}]}], "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/dml2/dml2_utils.c"], "versions": [{"version": "7966f319c66d9468623c6a6a017ecbc0dd79be75", "lessThan": "27df59c6071470efce7182ee92fbb16afba551e0", "status": "affected", "versionType": "git"}, {"version": "7966f319c66d9468623c6a6a017ecbc0dd79be75", "lessThan": "af114efe8d24b5711cfbedf7180f2ac1a296c24b", "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/dml2/dml2_utils.c"], "versions": [{"version": "6.7", "status": "affected"}, {"version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.9.8", "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": "6.7", "versionEndExcluding": "6.9.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.10"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/27df59c6071470efce7182ee92fbb16afba551e0"}, {"url": "https://git.kernel.org/stable/c/af114efe8d24b5711cfbedf7180f2ac1a296c24b"}], "title": "drm/amd/display: Skip pipe if the pipe idx not set properly", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T04:54:31.346Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/27df59c6071470efce7182ee92fbb16afba551e0", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/af114efe8d24b5711cfbedf7180f2ac1a296c24b", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-42064", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T16:20:05.965221Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:58.552Z"}}]}}

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{"bugzilla": {"description": "kernel: drm/amd/display: Skip pipe if the pipe idx not set properly", "id": "2300502", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2300502"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-20", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/amd/display: Skip pipe if the pipe idx not set properly\n[why]\nDriver crashes when pipe idx not set properly\n[how]\nAdd code to skip the pipe that idx not set properly"], "name": "CVE-2024-42064", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-07-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-42064\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-42064\nhttps://lore.kernel.org/linux-cve-announce/2024072950-CVE-2024-42064-5fc8@gregkh/T"], "threat_severity": "Low"}

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