{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.113-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.9-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  drm/virtio: fix NULL pointer dereference on fence allocation failure  virtio_gpu_fence_alloc() can fail due to memory pressure and return NULL, but its caller like virtio_gpu_init_submit() never checks it. Later, virtio_gpu_init_submit() passes the NULL fence to virtio_gpu_fence_event_create(), which unconditionally dereferences it.  Found when fuzzing the virtio driver with Syzkaller:  \tOops: general protection fault, probably for non-canonical address 0xdffffc0000000012: 0000 [#1] SMP KASAN NOPTI \tKASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097] \tCPU: 1 UID: 0 PID: 9991 Comm: syz.0.121 Not tainted 7.2.0 #4 PREEMPT(full) \tHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014 \tRIP: 0010:virtio_gpu_fence_event_create drivers/gpu/drm/virtio/virtgpu_submit.c:295 [inline] \tRIP: 0010:virtio_gpu_init_submit drivers/gpu/drm/virtio/virtgpu_submit.c:398 [inline] \tRIP: 0010:virtio_gpu_execbuffer_ioctl+0xc78/0x1aa0 drivers/gpu/drm/virtio/virtgpu_submit.c:505 \tCode: 85 ed 0f 85 21 09 00 00 e8 05 5a c9 fb 48 8b 44 24 10 48 8d b8 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 \u003c80\u003e 3c 02 00 0f 85 9a 0d 00 00 48 8b 44 24 10 4c 89 b0 90 00 00 00 \tRSP: 0018:ffffc900039dfad0 EFLAGS: 00010216 \tRAX: dffffc0000000000 RBX: ffffc900039dfdd8 RCX: ffffffff85f6fd3d \tRDX: 0000000000000012 RSI: ffffffff85f6fd4b RDI: 0000000000000090 \tRBP: 0000000000000000 R0virtio_gpu_virgl_process_cmd: ctrl 0x102, error 0x1203 \tR10: 0000000000000000 R11: 0000000000000000 R12: ffff8880132c4000 \tR13: 0000000000000000 R14: ffff888073b6c700 R15: 000000000000003b \tFS:  00007fab480b96c0(0000) GS:ffff8880eb6e9000(0000) knlGS:0000000000000000 \tCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 \tCR2: 00007effbf5e55a8 CR3: 0000000048d19000 CR4: 0000000000350ef0 \tCall Trace: \t\u003cTASK\u003e \tdrm_ioctl_kernel+0x1f4/0x3e0 drivers/gpu/drm/drm_ioctl.c:817 \tdrm_ioctl+0x5f4/0xc70 drivers/gpu/drm/drm_ioctl.c:914 \tvfs_ioctl fs/ioctl.c:51 [inline] \t__do_sys_ioctl fs/ioctl.c:597 [inline] \t__se_sys_ioctl fs/ioctl.c:583 [inline] \t__x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 \tdo_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] \tdo_syscall_64+0x116/0x800 arch/x86/entry/syscall_64.c:94 \tentry_SYSCALL_64_after_hwframe+0x77/0x7f \tRIP: 0033:0x7fab471a82bd \tCode: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 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 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 \tRSP: 002b:00007fab480b9018 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 \tRAX: ffffffffffffffda RBX: 00007fab47435fa0 RCX: 00007fab471a82bd \tRDX: 00002000000000c0 RSI: 00000000c0406442 RDI: 0000000000000003 \tRBP: 00007fab480b9080 R08: 0000000000000000 R09: 0000000000000000 \tR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 \tR13: 00007fab47436038 R14: 00007fab47435fa0 R15: 00007ffe85ab0740 \t\u003c/TASK\u003e \tModules linked in: \t---[ end trace 0000000000000000 ]--- \tRIP: 0010:virtio_gpu_fence_event_create drivers/gpu/drm/virtio/virtgpu_submit.c:295 [inline] \tRIP: 0010:virtio_gpu_init_submit drivers/gpu/drm/virtio/virtgpu_submit.c:398 [inline] \tRIP: 0010:virtio_gpu_execbuffer_ioctl+0xc78/0x1aa0 drivers/gpu/drm/virtio/virtgpu_submit.c:505 \tCode: 85 ed 0f 85 21 09 00 00 e8 05 5a c9 fb 48 8b 44 24 10 48 8d b8 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 \u003c80\u003e 3c 02 00 0f 85 9a 0d 00 00 48 8b 44 24 10 4c 89 b0 90 00 00 00 \tRSP: 0018:ffffc900039dfad0 EFLAGS: 00010216 \tRAX: dffffc0000000000 RBX: ffffc900039dfdd8 RCX: ffffffff85f6fd3d \tRDX: 0000000000000012 RSI: ffffffff85f6fd4b RDI: 0000000000000090 \tRBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 \tR10: 0000000000000000 R11: 0000000000000000 R12: ffff8880132c4000 \tR13: 0000000000000000 R14: ffff888073b6c700 R15: 000000000000003b \tFS:  00007fab480b96c0(0000) GS:ffff888098ae9000(0000) knlGS:00000000 ---truncated---",
  "id": "DEBIAN-CVE-2026-98508",
  "modified": "2026-10-19T04:47:26.679990015Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-98508"
    }
  ],
  "upstream": [
    "CVE-2026-98508"
  ]
}