CVE-2025-68193

{
  "id": "CVE-2025-68193",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-12-16T14:15:52.020",
  "lastModified": "2026-10-21T13:18:21.073",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/guc: Add devm release action to safely tear down CT\n\nWhen a buffer object (BO) is allocated with the XE_BO_FLAG_GGTT_INVALIDATE\nflag, the driver initiates TLB invalidation requests via the CTB mechanism\nwhile releasing the BO. However a premature release of the CTB BO can lead\nto system crashes, as observed in:\n\nOops: Oops: 0000 [#1] SMP NOPTI\nRIP: 0010:h2g_write+0x2f3/0x7c0 [xe]\nCall Trace:\n guc_ct_send_locked+0x8b/0x670 [xe]\n xe_guc_ct_send_locked+0x19/0x60 [xe]\n send_tlb_invalidation+0xb4/0x460 [xe]\n xe_gt_tlb_invalidation_ggtt+0x15e/0x2e0 [xe]\n ggtt_invalidate_gt_tlb.part.0+0x16/0x90 [xe]\n ggtt_node_remove+0x110/0x140 [xe]\n xe_ggtt_node_remove+0x40/0xa0 [xe]\n xe_ggtt_remove_bo+0x87/0x250 [xe]\n\nIntroduce a devm-managed release action during xe_guc_ct_init() and\nxe_guc_ct_init_post_hwconfig() to ensure proper CTB disablement before\nresource deallocation, preventing the use-after-free scenario."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/xe/guc: Añadir acción de liberación devm para desmantelar CT de forma segura\n\nCuando un objeto de búfer (BO) es asignado con la bandera XE_BO_FLAG_GGTT_INVALIDATE, el controlador inicia solicitudes de invalidación de TLB a través del mecanismo CTB mientras libera el BO. Sin embargo, una liberación prematura del BO CTB puede provocar fallos del sistema, como se observó en:\n\nOops: Oops: 0000 [#1] SMP NOPTI\nRIP: 0010:h2g_write+0x2f3/0x7c0 [xe]\nCall Trace:\n guc_ct_send_locked+0x8b/0x670 [xe]\n xe_guc_ct_send_locked+0x19/0x60 [xe]\n send_tlb_invalidation+0xb4/0x460 [xe]\n xe_gt_tlb_invalidation_ggtt+0x15e/0x2e0 [xe]\n ggtt_invalidate_gt_tlb.part.0+0x16/0x90 [xe]\n ggtt_node_remove+0x110/0x140 [xe]\n xe_ggtt_node_remove+0x40/0xa0 [xe]\n xe_ggtt_remove_bo+0x87/0x250 [xe]\n\nIntroducir una acción de liberación gestionada por devm durante xe_guc_ct_init() y xe_guc_ct_init_post_hwconfig() para asegurar la desactivación adecuada de CTB antes de la desasignación de recursos, previniendo el escenario de uso después de liberación."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_guc.c",
            "drivers/gpu/drm/xe/xe_guc_ct.c",
            "drivers/gpu/drm/xe/xe_guc_ct.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "231c4110873a5db4975512c30aa10edcc5be56e2",
              "lessThan": "fd4e41545d5955e6f7b4a0c4b56d21010ce8e812",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "231c4110873a5db4975512c30aa10edcc5be56e2",
              "lessThan": "52faa05fcd9f78af99abebe30a4b7b444744c991",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "231c4110873a5db4975512c30aa10edcc5be56e2",
              "lessThan": "ee4b32220a6b41e71512e8804585325e685456ba",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_guc.c",
            "drivers/gpu/drm/xe/xe_guc_ct.c",
            "drivers/gpu/drm/xe/xe_guc_ct.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.10",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.10",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.114",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.17.8",
              "lessThanOrEqual": "6.17.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/52faa05fcd9f78af99abebe30a4b7b444744c991",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ee4b32220a6b41e71512e8804585325e685456ba",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fd4e41545d5955e6f7b4a0c4b56d21010ce8e812",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}