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              "value": "AV:L - The vulnerable path is reached through local `/dev/kfd` ioctls, specifically allocating a KFD GPU memory object and passing its handle as `event_page_offset` to `AMDKFD_IOC_CREATE_EVENT`. There is no network, adjacent, or physical packet/device-input path.\nAC:L - The attacker controls the supplied event-page handle and can allocate a buffer smaller than `KFD_SIGNAL_EVENT_LIMIT * 8`, making the fixed-size `memset` out-of-bounds deterministic. No race or external condition is required.\nPR:L - The path is available to unprivileged userspace with access to KFD/AMDGPU device nodes, and the relevant ioctls have no capability flag or `capable()` gate. This is low privilege, not real administrator privilege.\nUI:N - Once a local attacker can execute code and open the device, exploitation only requires issuing ioctls. No victim user action is needed.\nS:U - The corruption occurs inside the kernel driver and impacts the same kernel security authority. This is standard local kernel compromise/DoS, not a cross-scope escape such as guest-to-host or IOMMU boundary bypass.\nC:H - The bug is an out-of-bounds kernel write into memory adjacent to a kernel-mapped GPU buffer, and kernel memory corruption can reasonably be leveraged to disclose sensitive kernel memory. Following the higher-severity rule for memory corruption, confidentiality impact is High.\nI:H - The vulnerable `memset` writes attacker-triggered data beyond the allocated object, giving a kernel memory corruption primitive. Out-of-bounds writes are scored as High integrity impact because they can plausibly be developed into privilege escalation or control-flow/data corruption.\nA:H - The out-of-bounds kernel write can corrupt adjacent kernel memory and readily crash or destabilize the kernel even without full exploitation. Kernel oops, panic, or persistent GPU/kernel failure is a High availability impact."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: Refactor amdgpu_gem_va_ioctl for Handling Last Fence Update and Timeline Management v4\n\nThis commit simplifies the amdgpu_gem_va_ioctl function, key updates\ninclude:\n - Moved the logic for managing the last update fence directly into\n   amdgpu_gem_va_update_vm.\n - Introduced checks for the timeline point to enable conditional\n   replacement or addition of fences.\n\nv2: Addressed review comments from Christian.\nv3: Updated comments (Christian).\nv4: The previous version selected the fence too early and did not manage its\n    reference correctly, which could lead to stale or freed fences being used.\n    This resulted in refcount underflows and could crash when updating GPU\n    timelines.\n    The fence is now chosen only after the VA mapping work is completed, and its\n    reference is taken safely. After exporting it to the VM timeline syncobj, the\n    driver always drops its local fence reference, ensuring balanced refcounting\n    and avoiding use-after-free on dma_fence.\n\n\tCrash signature:\n\t[  205.828135] refcount_t: underflow; use-after-free.\n\t[  205.832963] WARNING: CPU: 30 PID: 7274 at lib/refcount.c:28 refcount_warn_saturate+0xbe/0x110\n\t...\n\t[  206.074014] Call Trace:\n\t[  206.076488]  \u003cTASK\u003e\n\t[  206.078608]  amdgpu_gem_va_ioctl+0x6ea/0x740 [amdgpu]\n\t[  206.084040]  ? __pfx_amdgpu_gem_va_ioctl+0x10/0x10 [amdgpu]\n\t[  206.089994]  drm_ioctl_kernel+0x86/0xe0 [drm]\n\t[  206.094415]  drm_ioctl+0x26e/0x520 [drm]\n\t[  206.098424]  ? __pfx_amdgpu_gem_va_ioctl+0x10/0x10 [amdgpu]\n\t[  206.104402]  amdgpu_drm_ioctl+0x4b/0x80 [amdgpu]\n\t[  206.109387]  __x64_sys_ioctl+0x96/0xe0\n\t[  206.113156]  do_syscall_64+0x66/0x2d0\n\t...\n\t[  206.553351] BUG: unable to handle page fault for address: ffffffffc0dfde90\n\t...\n\t[  206.553378] RIP: 0010:dma_fence_signal_timestamp_locked+0x39/0xe0\n\t...\n\t[  206.553405] Call Trace:\n\t[  206.553409]  \u003cIRQ\u003e\n\t[  206.553415]  ? __pfx_drm_sched_fence_free_rcu+0x10/0x10 [gpu_sched]\n\t[  206.553424]  dma_fence_signal+0x30/0x60\n\t[  206.553427]  drm_sched_job_done.isra.0+0x123/0x150 [gpu_sched]\n\t[  206.553434]  dma_fence_signal_timestamp_locked+0x6e/0xe0\n\t[  206.553437]  dma_fence_signal+0x30/0x60\n\t[  206.553441]  amdgpu_fence_process+0xd8/0x150 [amdgpu]\n\t[  206.553854]  sdma_v4_0_process_trap_irq+0x97/0xb0 [amdgpu]\n\t[  206.554353]  edac_mce_amd(E) ee1004(E)\n\t[  206.554270]  amdgpu_irq_dispatch+0x150/0x230 [amdgpu]\n\t[  206.554702]  amdgpu_ih_process+0x6a/0x180 [amdgpu]\n\t[  206.555101]  amdgpu_irq_handler+0x23/0x60 [amdgpu]\n\t[  206.555500]  __handle_irq_event_percpu+0x4a/0x1c0\n\t[  206.555506]  handle_irq_event+0x38/0x80\n\t[  206.555509]  handle_edge_irq+0x92/0x1e0\n\t[  206.555513]  __common_interrupt+0x3e/0xb0\n\t[  206.555519]  common_interrupt+0x80/0xa0\n\t[  206.555525]  \u003c/IRQ\u003e\n\t[  206.555527]  \u003cTASK\u003e\n\t...\n\t[  206.555650] RIP: 0010:dma_fence_signal_timestamp_locked+0x39/0xe0\n\t...\n\t[  206.555667] Kernel panic - not syncing: Fatal exception in interrupt"
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              "versionType": "git"
            },
            {
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/basics/vector.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.15"
            },
            {
              "lessThan": "4.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.260",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.94",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.260",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.210",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.176",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.143",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.94",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.36",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.13",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Use krealloc_array() in dal_vector_reserve()\n\n[Why \u0026 How]\ndal_vector_reserve() computes the allocation size as\n\"capacity * vector-\u003estruct_size\" using uint32_t arithmetic, which can\nsilently wrap to a small value on overflow. This would cause krealloc to\nreturn a smaller buffer than expected, leading to heap overflows on\nsubsequent vector appends.\n\nReplace krealloc() with krealloc_array() which performs an internal\noverflow check and returns NULL on wrap, preventing the issue.\n\n(cherry picked from commit 37668568641ccc4cc1dbca4923d0a16609dd5707)"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The reachable kernel path is AMDGPU DRM display handling via local DRM connector probing or modeset operations; it is not network or namespace reachable. Physical hotplug can also reach related detection paths, but local DRM access is the higher-severity reasonable vector.\nAC:H - The overflow is deterministic once vector capacity crosses the uint32 multiplication limit, but the reachable DDC callers I found pass fixed tiny payload lengths and an attacker would need an unusual path causing enormous vector growth. That prerequisite is outside normal attacker control.\nPR:L - Triggering the relevant DRM display paths requires local access to the KMS device or DRM master-style display control, not real root in the init namespace. No user-namespace route or network-facing unauthenticated path reaches this code.\nUI:N - A local attacker who has the needed DRM access can trigger connector probing or modeset paths directly. No separate victim action is required.\nS:U - The corruption occurs inside the host kernel display driver and affects the same kernel security authority. There is no VM escape, IOMMU boundary bypass, or cross-scope component involved.\nC:H - The vulnerable allocation can leave the vector with a logical capacity larger than its actual heap buffer, and subsequent appends can corrupt adjacent kernel heap memory. Kernel heap corruption is reasonably leverageable for information disclosure.\nI:H - Subsequent vector appends perform out-of-bounds writes of controlled `struct i2c_payload` contents into adjacent kernel heap memory. That is kernel memory corruption and can plausibly support control-flow or data-integrity compromise.\nA:H - Even without full exploitation, the undersized allocation followed by appends can corrupt heap metadata or neighboring objects. That can cause kernel oops, panic, or display-driver crashes."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:35:01.324Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9540b0a4d13e4ede64ae1197d66a176d2149daa9"
        },
        {
          "url": "https://git.kernel.org/stable/c/31180638a33acad12c863132704a76536fb66211"
        },
        {
          "url": "https://git.kernel.org/stable/c/b15825deac1acff72638bbc8f05b89ceef8dfb13"
        },
        {
          "url": "https://git.kernel.org/stable/c/201151e120f0062bcda21cad5d007b82725ad23b"
        },
        {
          "url": "https://git.kernel.org/stable/c/a914aa802669e073f014dae2e5708633b5cecd34"
        },
        {
          "url": "https://git.kernel.org/stable/c/e09689286385a66311ac6922af95339d7a3cef8d"
        },
        {
          "url": "https://git.kernel.org/stable/c/de988c7a31f0774f07894cfe4802996f318e2870"
        },
        {
          "url": "https://git.kernel.org/stable/c/da48bc4461b8a5ebfb9264c9b191a701d8e99009"
        }
      ],
      "title": "drm/amd/display: Use krealloc_array() in dal_vector_reserve()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53329",
    "datePublished": "2026-07-01T13:32:14.598Z",
    "dateReserved": "2026-06-09T07:44:35.398Z",
    "dateUpdated": "2026-10-19T20:07:43.379Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}