{
  "cveId": "CVE-2026-68239",
  "url": "https://patchblox.com/security/cve/CVE-2026-68239",
  "summary": "CVE-2026-68239 is fixed in 20 products on 1 platform, first by DEBIAN-CVE-2026-68239, released August 11, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  drm/ttm: Account for NULL and handle pages in tt...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  drm/ttm: Account for NULL and handle pages in ttm_pool_backup  Pages in ttm_pool_backup can be NULL or backup handles (ttm_backup_page_ptr_is_handle()), neither of which can be passed to set_pages_array_wb() or freed. Add a dedicated WB pass before the dma/purge loop that walks allocations using the same i \u002B= num_pages stride, skipping NULL and handle entries, and calls set_pages_array_wb() once per contiguous run of real pages. Apply the same NULL/handle guard to the dma/purge loop.  Fixes the following oops:  Oops: general protection fault, kernel NULL pointer dereference 0x0: 0000 [#1] SMP NOPTI RIP: 0010:__cpa_process_fault\u002B0xf8/0x770 RSP: 0018:ffffc90000a87718 EFLAGS: 00010287 RAX: 0000000000000000 RBX: ffffc90000a87868 RCX: 0000000000000000 RDX: 0000000000001000 RSI: 0005088000000000 RDI: ffffffff827c5f34 RBP: 0005088000000000 R08: ffffc90000a877cb R09: ffffc90000a877d0 R10: 0000000000000000 R11: 000000000000001b R12: 000ffffffffff000 R13: ffffc90000a87868 R14: ffffc90000a87868 R15: ffff88815b882ae0 FS:  0000000000000000(0000) GS:ffff8884ec840000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f930b844000 CR3: 000000000262e003 CR4: 0000000008f70ef0 PKRU: 55555554 Call Trace:  \u003CTASK\u003E  __change_page_attr_set_clr\u002B0x989/0xe90  ? __purge_vmap_area_lazy\u002B0x6c/0x3a0  ? _vm_unmap_aliases\u002B0x250/0x2a0  set_pages_array_wb\u002B0x7f/0x120  ttm_pool_backup\u002B0x4c9/0x5b0 [ttm]  ? dma_resv_wait_timeout\u002B0x3b/0xf0  ttm_tt_backup\u002B0x32/0x60 [ttm]  ttm_bo_shrink\u002B0x66/0x110 [ttm]  xe_bo_shrink_purge\u002B0x12b/0x1b0 [xe]  xe_bo_shrink\u002B0xbb/0x270 [xe]  __xe_shrinker_walk\u002B0xf7/0x160 [xe]  xe_shrinker_walk\u002B0x9d/0xc0 [xe]  xe_shrinker_scan\u002B0x11f/0x210 [xe]  do_shrink_slab\u002B0x13b/0x270  shrink_slab\u002B0xf1/0x400  shrink_node\u002B0x352/0x8a0  balance_pgdat\u002B0x32c/0x700  kswapd\u002B0x205/0x2f0  ? __pfx_autoremove_wake_function\u002B0x10/0x10  ? __pfx_kswapd\u002B0x10/0x10  kthread\u002B0xd1/0x110  ? __pfx_kthread\u002B0x10/0x10  ret_from_fork\u002B0x1b1/0x200  ? __pfx_kthread\u002B0x10/0x10  ret_from_fork_asm\u002B0x1a/0x30  \u003C/TASK\u003E",
  "published": "2026-08-10T13:20:12Z",
  "severity": "important",
  "epss": 0.00166,
  "epssPercentile": 0.05891,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.18.44-99.149",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra-common",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.6-1",
      "fix": "DEBIAN-CVE-2026-68239",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-68239",
      "released": "2026-08-11T16:03:09Z"
    },
    {
      "platform": "linux",
      "product": "microvm-kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}