{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-56608", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-27T14:03:06.013Z", "datePublished": "2024-12-27T14:51:13.210Z", "dateUpdated": "2026-08-05T11:45:28.174Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:45:28.174Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix out-of-bounds access in 'dcn21_link_encoder_create'\n\nAn issue was identified in the dcn21_link_encoder_create function where\nan out-of-bounds access could occur when the hpd_source index was used\nto reference the link_enc_hpd_regs array. This array has a fixed size\nand the index was not being checked against the array's bounds before\naccessing it.\n\nThis fix adds a conditional check to ensure that the hpd_source index is\nwithin the valid range of the link_enc_hpd_regs array. If the index is\nout of bounds, the function now returns NULL to prevent undefined\nbehavior.\n\nReferences:\n\n[ 65.920507] ------------[ cut here ]------------\n[ 65.920510] UBSAN: array-index-out-of-bounds in drivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn21/dcn21_resource.c:1312:29\n[ 65.920519] index 7 is out of range for type 'dcn10_link_enc_hpd_registers [5]'\n[ 65.920523] CPU: 3 PID: 1178 Comm: modprobe Tainted: G OE 6.8.0-cleanershaderfeatureresetasdntipmi200nv2132 #13\n[ 65.920525] Hardware name: AMD Majolica-RN/Majolica-RN, BIOS WMJ0429N_Weekly_20_04_2 04/29/2020\n[ 65.920527] Call Trace:\n[ 65.920529] \n[ 65.920532] dump_stack_lvl+0x48/0x70\n[ 65.920541] dump_stack+0x10/0x20\n[ 65.920543] __ubsan_handle_out_of_bounds+0xa2/0xe0\n[ 65.920549] dcn21_link_encoder_create+0xd9/0x140 [amdgpu]\n[ 65.921009] link_create+0x6d3/0xed0 [amdgpu]\n[ 65.921355] create_links+0x18a/0x4e0 [amdgpu]\n[ 65.921679] dc_create+0x360/0x720 [amdgpu]\n[ 65.921999] ? dmi_matches+0xa0/0x220\n[ 65.922004] amdgpu_dm_init+0x2b6/0x2c90 [amdgpu]\n[ 65.922342] ? console_unlock+0x77/0x120\n[ 65.922348] ? dev_printk_emit+0x86/0xb0\n[ 65.922354] dm_hw_init+0x15/0x40 [amdgpu]\n[ 65.922686] amdgpu_device_init+0x26a8/0x33a0 [amdgpu]\n[ 65.922921] amdgpu_driver_load_kms+0x1b/0xa0 [amdgpu]\n[ 65.923087] amdgpu_pci_probe+0x1b7/0x630 [amdgpu]\n[ 65.923087] local_pci_probe+0x4b/0xb0\n[ 65.923087] pci_device_probe+0xc8/0x280\n[ 65.923087] really_probe+0x187/0x300\n[ 65.923087] __driver_probe_device+0x85/0x130\n[ 65.923087] driver_probe_device+0x24/0x110\n[ 65.923087] __driver_attach+0xac/0x1d0\n[ 65.923087] ? __pfx___driver_attach+0x10/0x10\n[ 65.923087] bus_for_each_dev+0x7d/0xd0\n[ 65.923087] driver_attach+0x1e/0x30\n[ 65.923087] bus_add_driver+0xf2/0x200\n[ 65.923087] driver_register+0x64/0x130\n[ 65.923087] ? __pfx_amdgpu_init+0x10/0x10 [amdgpu]\n[ 65.923087] __pci_register_driver+0x61/0x70\n[ 65.923087] amdgpu_init+0x7d/0xff0 [amdgpu]\n[ 65.923087] do_one_initcall+0x49/0x310\n[ 65.923087] ? kmalloc_trace+0x136/0x360\n[ 65.923087] do_init_module+0x6a/0x270\n[ 65.923087] load_module+0x1fce/0x23a0\n[ 65.923087] init_module_from_file+0x9c/0xe0\n[ 65.923087] ? init_module_from_file+0x9c/0xe0\n[ 65.923087] idempotent_init_module+0x179/0x230\n[ 65.923087] __x64_sys_finit_module+0x5d/0xa0\n[ 65.923087] do_syscall_64+0x76/0x120\n[ 65.923087] entry_SYSCALL_64_after_hwframe+0x6e/0x76\n[ 65.923087] RIP: 0033:0x7f2d80f1e88d\n[ 65.923087] Code: 5b 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 73 b5 0f 00 f7 d8 64 89 01 48\n[ 65.923087] RSP: 002b:00007ffc7bc1aa78 EFLAGS: 00000246 ORIG_RAX: 0000000000000139\n[ 65.923087] RAX: ffffffffffffffda RBX: 0000564c9c1db130 RCX: 00007f2d80f1e88d\n[ 65.923087] RDX: 0000000000000000 RSI: 0000564c9c1e5480 RDI: 000000000000000f\n[ 65.923087] RBP: 0000000000040000 R08: 0000000000000000 R09: 0000000000000002\n[ 65.923087] R10: 000000000000000f R11: 0000000000000246 R12: 0000564c9c1e5480\n[ 65.923087] R13: 0000564c9c1db260 R14: 0000000000000000 R15: 0000564c9c1e54b0\n[ 65.923087] \n[ 65.923927] ---[ end trace ]---" } ], "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 amdgpu device probe (amdgpu_pci_probe → dm_hw_init → dc_create → create_links → dcn21_link_encoder_create), a local driver-initialization path with no network or remote-peer data involved. Triggering it requires local system access such as module load or PCI driver bind.\nAC:L - On an affected DCN2.1 platform the out-of-bounds index is produced deterministically every single probe, because get_hpd_line() returns HPD_SOURCEID_UNKNOWN (7) or HPD_SOURCEID6 (5) for the board's connector table — no race, no memory-layout luck, and no unpredictable state is required.\nPR:L - Reaching the path requires only the ability to cause the driver to initialize the display core on a local system; consistent with other drm/amd/display array-index CVEs, an ordinary local user context is credited rather than full administrative privilege.\nUI:N - The out-of-bounds access occurs automatically during driver initialization on affected hardware; no victim must open a file, plug in a display, or take any other action.\nS:U - The overread, the corrupted register-offset pointer, and all resulting effects stay within the kernel's own security authority — no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - Kernel .rodata beyond link_enc_hpd_regs[] is read out of bounds and the value becomes an MMIO register offset, so unintended GPU registers are read back through the HPD read-modify-write path, giving an uncontrolled disclosure primitive over kernel constant data and device state.\nI:H - The bogus offset from the overread is used by HPD_REG_UPDATE → dm_write_reg → amdgpu_device_wreg to perform a read-modify-write to an arbitrary GPU register, corrupting display-hardware state that was never meant to be written.\nA:H - Writing DC_HPD_EN into an arbitrary register address produces undefined GPU behavior — display engine hangs, GPU resets, or kernel oops — and the UBSAN array-index-out-of-bounds report itself will panic the system when panic_on_warn or CONFIG_UBSAN_TRAP is set." } ] } ], "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/resource/dcn21/dcn21_resource.c" ], "versions": [ { "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "280f722601c8bf4d8a9c62dd727cf3a2fd0a47be", "status": "affected", "versionType": "git" }, { "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "b19ca8425a4b86e8f0d7c33c4e87ef7b0ebdaa29", "status": "affected", "versionType": "git" }, { "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "5bd410c21037107b83ffbb51dd2d6460f9de9ed1", "status": "affected", "versionType": "git" }, { "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "08ac5fdb9c6dc34d0ed4bc64ce3c5c3d411b3b53", "status": "affected", "versionType": "git" }, { "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "f01ddd589e162979421e6914b1c74018633f01e0", "status": "affected", "versionType": "git" }, { "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "63de35a8fcfca59ae8750d469a7eb220c7557baf", "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/resource/dcn21/dcn21_resource.c" ], "versions": [ { "version": "4.15", "status": "affected" }, { "version": "0", "lessThan": "4.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.237", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.181", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.127", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.74", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.5", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13", "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": "5.10.237" }, { "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": "6.1.127" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.6.74" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.12.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/280f722601c8bf4d8a9c62dd727cf3a2fd0a47be" }, { "url": "https://git.kernel.org/stable/c/b19ca8425a4b86e8f0d7c33c4e87ef7b0ebdaa29" }, { "url": "https://git.kernel.org/stable/c/5bd410c21037107b83ffbb51dd2d6460f9de9ed1" }, { "url": "https://git.kernel.org/stable/c/08ac5fdb9c6dc34d0ed4bc64ce3c5c3d411b3b53" }, { "url": "https://git.kernel.org/stable/c/f01ddd589e162979421e6914b1c74018633f01e0" }, { "url": "https://git.kernel.org/stable/c/63de35a8fcfca59ae8750d469a7eb220c7557baf" } ], "title": "drm/amd/display: Fix out-of-bounds access in 'dcn21_link_encoder_create'", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:50:55.342Z" } } ] } }