{"id":"CVE-2024-46816","state":"PUBLISHED","title":"drm/amd/display: Stop amdgpu_dm initialize when link nums greater than max_links","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Stop amdgpu_dm initialize when link nums greater than max_links\n\n[Why]\nCoverity report OVERRUN warning. There are\nonly max_links elements within dc->links. link\ncount could up to AMDGPU_DM_MAX_DISPLAY_INDEX 31.\n\n[How]\nMake sure link count less than max_links.","publishedAt":"2024-09-27T12:35:57.742Z","updatedAt":"2026-08-05T11:38:47.072Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c","status":"affected","lessThan":"e2411b6abf6e5d6c33d0450846673cdf536f0ba4","versionType":"git"},{"version":"4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c","status":"affected","lessThan":"e3cd0d8362de47f613bfdf315b3f3a9ab71e66bf","versionType":"git"},{"version":"4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c","status":"affected","lessThan":"13080d052c995aee14695a5b740c245121eb2bcc","versionType":"git"},{"version":"4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c","status":"affected","lessThan":"c84632096722fd31251f0957fafc9e90d9a247fd","versionType":"git"},{"version":"4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c","status":"affected","lessThan":"36c39a8dcce210649f2f45f252abaa09fcc1ae87","versionType":"git"},{"version":"4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c","status":"affected","lessThan":"cf8b16857db702ceb8d52f9219a4613363e2b1cf","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.15","versionType":"semver"},{"version":"5.10.237","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.181","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.135","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.88","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.10.9","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c"]}],"references":["https://git.kernel.org/stable/c/e2411b6abf6e5d6c33d0450846673cdf536f0ba4","https://git.kernel.org/stable/c/e3cd0d8362de47f613bfdf315b3f3a9ab71e66bf","https://git.kernel.org/stable/c/13080d052c995aee14695a5b740c245121eb2bcc","https://git.kernel.org/stable/c/c84632096722fd31251f0957fafc9e90d9a247fd","https://git.kernel.org/stable/c/36c39a8dcce210649f2f45f252abaa09fcc1ae87","https://git.kernel.org/stable/c/cf8b16857db702ceb8d52f9219a4613363e2b1cf","https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html","https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:47.831Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/46xxx/CVE-2024-46816.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-46816","state":"PUBLISHED","datePublished":"2024-09-27T12:35:57.742Z","dateUpdated":"2026-08-05T11:38:47.072Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-09-11T15:12:18.283Z"},"containers":{"cna":{"title":"drm/amd/display: Stop amdgpu_dm initialize when link nums greater than max_links","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Stop amdgpu_dm initialize when link nums greater than max_links\n\n[Why]\nCoverity report OVERRUN warning. There are\nonly max_links elements within dc->links. link\ncount could up to AMDGPU_DM_MAX_DISPLAY_INDEX 31.\n\n[How]\nMake sure link count less than max_links."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c","status":"affected","lessThan":"e2411b6abf6e5d6c33d0450846673cdf536f0ba4","versionType":"git"},{"version":"4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c","status":"affected","lessThan":"e3cd0d8362de47f613bfdf315b3f3a9ab71e66bf","versionType":"git"},{"version":"4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c","status":"affected","lessThan":"13080d052c995aee14695a5b740c245121eb2bcc","versionType":"git"},{"version":"4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c","status":"affected","lessThan":"c84632096722fd31251f0957fafc9e90d9a247fd","versionType":"git"},{"version":"4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c","status":"affected","lessThan":"36c39a8dcce210649f2f45f252abaa09fcc1ae87","versionType":"git"},{"version":"4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c","status":"affected","lessThan":"cf8b16857db702ceb8d52f9219a4613363e2b1cf","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.15","versionType":"semver"},{"version":"5.10.237","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.181","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.135","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.88","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.10.9","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/e2411b6abf6e5d6c33d0450846673cdf536f0ba4"},{"url":"https://git.kernel.org/stable/c/e3cd0d8362de47f613bfdf315b3f3a9ab71e66bf"},{"url":"https://git.kernel.org/stable/c/13080d052c995aee14695a5b740c245121eb2bcc"},{"url":"https://git.kernel.org/stable/c/c84632096722fd31251f0957fafc9e90d9a247fd"},{"url":"https://git.kernel.org/stable/c/36c39a8dcce210649f2f45f252abaa09fcc1ae87"},{"url":"https://git.kernel.org/stable/c/cf8b16857db702ceb8d52f9219a4613363e2b1cf"}],"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 overrun occurs in the amdgpu display-manager probe path (`dm_hw_init` → `amdgpu_dm_init` → `amdgpu_dm_initialize_drm_device`), reachable only on the local system via driver bind/module load on affected hardware, with no network or remote-peer input involved.\nAC:L - On an affected configuration (USB4 DPIA-capable DCN31/314/35 part whose connector count plus DPIA and virtual links exceeds MAX_LINKS=12) the out-of-bounds indexing happens deterministically every probe — there is no race and no memory-layout lottery to win.\nPR:L - Consistent with sibling amdgpu display OOB scoring, a low-privileged local user is credited with reaching the driver initialization path; no root-only capability check gates the vulnerable loop itself.\nUI:N - The faulty loop executes automatically during GPU driver initialization with no victim action required — no file must be opened, no display attached, no configuration performed.\nS:U - The out-of-bounds access and its consequences are confined to kernel memory within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Indices 12–31 read past `dc->links[MAX_LINKS]` into adjacent `struct dc` members (`link_srv`, `current_state`, `res_pool`, `clk_mgr`), disclosing kernel pointers, and the resulting type-confused `dc_link *` is dereferenced for further wide reads (`link->dpcd_caps`, `link->type`).\nI:H - The out-of-bounds `link` pointer is written through — `link->psr_settings.psr_feature_enabled/psr_version` and the writes inside `dc_link_detect()`/`amdgpu_dm_set_psr_caps()` — so unrelated kernel objects are corrupted at attacker-unintended offsets, a classic type-confusion write primitive.\nA:H - Dereferencing garbage taken from beyond the array as a `struct dc_link *` reliably faults or corrupts core display-manager state during initialization, producing a kernel oops/panic at boot."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T11:38:47.072Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"5.10.237"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"5.15.181"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.1.135"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.6.88"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.10.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.11"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-09-29T14:17:56.570304Z","id":"CVE-2024-46816","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-29T14:18:08.645Z"}},{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T19:31:12.490Z"}}]}}}