{"id":"CVE-2026-53374","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: zero-initialize GART table on allocation\n\nGART TLB is flushed after unmapping but not after mapping","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: zero-initialize GART table on allocation\n\nGART TLB is flushed after unmapping but not after mapping. Since\namdgpu_bo_create_kernel() does not zero-initializ…","severity":"high","published":"2026-07-19","updated":"2026-07-19","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53374","references":[{"url":"https://git.kernel.org/stable/c/40df11255d71b02e20e70579f1b12b687e396e26","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/791941be5da125d9a1b228582bfdc300c05d05b3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8ae8b9e74bab94aab1d79f1688129bcc61c8b29a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/91fbb5e635c8fb1b49e15c19da06480089ef719f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b17175d0a375b3ed5e81597dac4983fdb46e478d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e6c2e6c2e1fa066968a16aca1cb66cd1bdde7741","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-07-19T15:31:16.149Z","epss":0.00127,"epssPercentile":0.02391,"vendor":"Linux","product":"Linux","affected":["Linux >= d38ceaf99ed015f2a0b9af3499791bd3a3daae21 < 40df11255d71b02e20e70579f1b12b687e396e26","Linux >= d38ceaf99ed015f2a0b9af3499791bd3a3daae21 < 91fbb5e635c8fb1b49e15c19da06480089ef719f","Linux >= d38ceaf99ed015f2a0b9af3499791bd3a3daae21 < 8ae8b9e74bab94aab1d79f1688129bcc61c8b29a","Linux >= d38ceaf99ed015f2a0b9af3499791bd3a3daae21 < b17175d0a375b3ed5e81597dac4983fdb46e478d","Linux >= d38ceaf99ed015f2a0b9af3499791bd3a3daae21 < 791941be5da125d9a1b228582bfdc300c05d05b3","Linux >= d38ceaf99ed015f2a0b9af3499791bd3a3daae21 < e6c2e6c2e1fa066968a16aca1cb66cd1bdde7741","Linux 4.2"],"cvss":8.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:29:33.338896Z"},"cvssSource":"cna","slug":"CVE-2026-53374","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: zero-initialize GART table on allocation\n\nGART TLB is flushed after unmapping but not after mapping. Since\namdgpu_bo_create_kernel() does not zero-initialize the buffer, when a\nsingle PTE is written the TLB may speculatively load other uninitialized\nentries from the same cacheline. Those garbage entries can appear valid,\nand a subsequent write to another PTE in the same cacheline may cause the\nGPU to use a stale garbage PTE from the TLB.\n\nFix this by calling memset_io() to zero-initialize the GART table with\ngart_pte_flags immediately after allocation.\n\nUsing AMDGPU_GEM_CREATE_VRAM_CLEARED, SDMA-based clear will not work\nsince SDMA needs GART to be initialized to work.\n\n(cherry picked from commit d9af8263b82b6eaa60c5718e0c6631c5037e4b24)\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":223108,"id":"CVE-2026-53374","ts":1792172293477,"field":"cvss","old":null,"new":"8.8"},{"seq":223107,"id":"CVE-2026-53374","ts":1792172293477,"field":"severity","old":"none","new":"high"}]}