CVE-2024-43901

{"id": "CVE-2024-43901", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-08-26T11:15:04.673", "references": [{"url": "https://git.kernel.org/stable/c/1e68b7ce6bc6073579fe8713ec6b85aa9cd2e351", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/5af757124792817f8eb1bd0c80ad60fab519586b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix NULL pointer dereference for DTN log in DCN401\n\nWhen users run the command:\n\ncat /sys/kernel/debug/dri/0/amdgpu_dm_dtn_log\n\nThe following NULL pointer dereference happens:\n\n[ +0.000003] BUG: kernel NULL pointer dereference, address: NULL\n[ +0.000005] #PF: supervisor instruction fetch in kernel mode\n[ +0.000002] #PF: error_code(0x0010) - not-present page\n[ +0.000002] PGD 0 P4D 0\n[ +0.000004] Oops: 0010 [#1] PREEMPT SMP NOPTI\n[ +0.000003] RIP: 0010:0x0\n[ +0.000008] Code: Unable to access opcode bytes at 0xffffffffffffffd6.\n[...]\n[ +0.000002] PKRU: 55555554\n[ +0.000002] Call Trace:\n[ +0.000002] <TASK>\n[ +0.000003] ? show_regs+0x65/0x70\n[ +0.000006] ? __die+0x24/0x70\n[ +0.000004] ? page_fault_oops+0x160/0x470\n[ +0.000006] ? do_user_addr_fault+0x2b5/0x690\n[ +0.000003] ? prb_read_valid+0x1c/0x30\n[ +0.000005] ? exc_page_fault+0x8c/0x1a0\n[ +0.000005] ? asm_exc_page_fault+0x27/0x30\n[ +0.000012] dcn10_log_color_state+0xf9/0x510 [amdgpu]\n[ +0.000306] ? srso_alias_return_thunk+0x5/0xfbef5\n[ +0.000003] ? vsnprintf+0x2fb/0x600\n[ +0.000009] dcn10_log_hw_state+0xfd0/0xfe0 [amdgpu]\n[ +0.000218] ? __mod_memcg_lruvec_state+0xe8/0x170\n[ +0.000008] ? srso_alias_return_thunk+0x5/0xfbef5\n[ +0.000002] ? debug_smp_processor_id+0x17/0x20\n[ +0.000003] ? srso_alias_return_thunk+0x5/0xfbef5\n[ +0.000002] ? srso_alias_return_thunk+0x5/0xfbef5\n[ +0.000002] ? set_ptes.isra.0+0x2b/0x90\n[ +0.000004] ? srso_alias_return_thunk+0x5/0xfbef5\n[ +0.000002] ? _raw_spin_unlock+0x19/0x40\n[ +0.000004] ? srso_alias_return_thunk+0x5/0xfbef5\n[ +0.000002] ? do_anonymous_page+0x337/0x700\n[ +0.000004] dtn_log_read+0x82/0x120 [amdgpu]\n[ +0.000207] full_proxy_read+0x66/0x90\n[ +0.000007] vfs_read+0xb0/0x340\n[ +0.000005] ? __count_memcg_events+0x79/0xe0\n[ +0.000002] ? srso_alias_return_thunk+0x5/0xfbef5\n[ +0.000003] ? count_memcg_events.constprop.0+0x1e/0x40\n[ +0.000003] ? handle_mm_fault+0xb2/0x370\n[ +0.000003] ksys_read+0x6b/0xf0\n[ +0.000004] __x64_sys_read+0x19/0x20\n[ +0.000003] do_syscall_64+0x60/0x130\n[ +0.000004] entry_SYSCALL_64_after_hwframe+0x6e/0x76\n[ +0.000003] RIP: 0033:0x7fdf32f147e2\n[...]\n\nThis error happens when the color log tries to read the gamut remap\ninformation from DCN401 which is not initialized in the dcn401_dpp_funcs\nwhich leads to a null pointer dereference. This commit addresses this\nissue by adding a proper guard to access the gamut_remap callback in\ncase the specific ASIC did not implement this function."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amd/display: corrige la desreferencia del puntero NULL para el registro DTN en DCN401 Cuando los usuarios ejecutan el comando: cat /sys/kernel/debug/dri/0/amdgpu_dm_dtn_log El siguiente puntero NULL ocurre la desreferencia: [+0.000003] ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: NULL [+0.000005] #PF: b\u00fasqueda de instrucciones del supervisor en modo kernel [+0.000002] #PF: c\u00f3digo_error(0x0010) - p\u00e1gina no presente [+0.000002] PGD 0 P4D 0 [ +0.000004] Ups: 0010 [#1] PREEMPT SMP NOPTI [ +0.000003] RIP: 0010:0x0 [ +0.000008] C\u00f3digo: No se puede acceder a los bytes del c\u00f3digo de operaci\u00f3n en 0xffffffffffffffd6. [...] [ +0.000002] PKRU: 55555554 [ +0.000002] Seguimiento de llamadas: [ +0.000002] [ +0.000003] ? show_regs+0x65/0x70 [+0.000006]? __die+0x24/0x70 [ +0.000004] ? page_fault_oops+0x160/0x470 [+0.000006]? do_user_addr_fault+0x2b5/0x690 [+0.000003]? prb_read_valid+0x1c/0x30 [+0.000005]? exc_page_fault+0x8c/0x1a0 [+0.000005]? asm_exc_page_fault+0x27/0x30 [ +0.000012] dcn10_log_color_state+0xf9/0x510 [amdgpu] [ +0.000306] ? srso_alias_return_thunk+0x5/0xfbef5 [+0.000003]? vsnprintf+0x2fb/0x600 [ +0.000009] dcn10_log_hw_state+0xfd0/0xfe0 [amdgpu] [ +0.000218] ? __mod_memcg_lruvec_state+0xe8/0x170 [ +0.000008] ? srso_alias_return_thunk+0x5/0xfbef5 [+0.000002]? debug_smp_processor_id+0x17/0x20 [+0.000003]? srso_alias_return_thunk+0x5/0xfbef5 [+0.000002]? srso_alias_return_thunk+0x5/0xfbef5 [+0.000002]? set_ptes.isra.0+0x2b/0x90 [ +0.000004] ? srso_alias_return_thunk+0x5/0xfbef5 [+0.000002]? _raw_spin_unlock+0x19/0x40 [+0.000004]? srso_alias_return_thunk+0x5/0xfbef5 [+0.000002]? do_anonymous_page+0x337/0x700 [ +0.000004] dtn_log_read+0x82/0x120 [amdgpu] [ +0.000207] full_proxy_read+0x66/0x90 [ +0.000007] vfs_read+0xb0/0x340 [ +0.000005] ? __count_memcg_events+0x79/0xe0 [+0.000002]? srso_alias_return_thunk+0x5/0xfbef5 [+0.000003]? count_memcg_events.constprop.0+0x1e/0x40 [+0.000003]? handle_mm_fault+0xb2/0x370 [ +0.000003] ksys_read+0x6b/0xf0 [ +0.000004] __x64_sys_read+0x19/0x20 [ +0.000003] do_syscall_64+0x60/0x130 [ +0.000004] _64_after_hwframe+0x6e/0x76 [+0.000003] RIP: 0033:0x7fdf32f147e2 [...] Este error ocurre cuando el registro de color intenta leer la informaci\u00f3n de reasignaci\u00f3n de gama de DCN401 que no est\u00e1 inicializada en dcn401_dpp_funcs, lo que conduce a una desreferencia del puntero nulo. Esta confirmaci\u00f3n soluciona este problema agregando una protecci\u00f3n adecuada para acceder a la devoluci\u00f3n de llamada gamut_remap en caso de que el ASIC espec\u00edfico no haya implementado esta funci\u00f3n."}], "lastModified": "2024-08-27T14:38:44.187", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E4CB0927-C720-465B-99F2-3E47215515F2", "versionEndExcluding": "6.10.5"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}