CVE-2025-68757

{
  "id": "CVE-2025-68757",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4077798484459a2eced2050045099a466ecb618a",
              "lessThan": "37289a18099fc7ce916933bd542926a7334791a3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4077798484459a2eced2050045099a466ecb618a",
              "lessThan": "489b2158aec92a3fc256d70992416869f86e16e0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4077798484459a2eced2050045099a466ecb618a",
              "lessThan": "1026d1b0bd55e1be7ba0f9e9b1c9f6e02448f25a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4077798484459a2eced2050045099a466ecb618a",
              "lessThan": "9dc3c78d21e16f5af1a9c3d11b4bd5276f891fe0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4077798484459a2eced2050045099a466ecb618a",
              "lessThan": "338e388c0d80ffc04963b6b0ec702ffdfd2c4eba",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4077798484459a2eced2050045099a466ecb618a",
              "lessThan": "4f335cb8fad69b2be5accf0ebac3a8b345915f4e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4077798484459a2eced2050045099a466ecb618a",
              "lessThan": "1f0ca9d3e7c38a39f1f12377c24decf0bba46e54",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4077798484459a2eced2050045099a466ecb618a",
              "lessThan": "78b4d6463e9e69e5103f98b367f8984ad12cdc6f",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/vgem/vgem_fence.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.8"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.8",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.248",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.198",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.160",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.120",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.63",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.17.13",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.2",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/vgem/vgem_fence.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-01-05T10:15:56.773",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1026d1b0bd55e1be7ba0f9e9b1c9f6e02448f25a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1f0ca9d3e7c38a39f1f12377c24decf0bba46e54",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/338e388c0d80ffc04963b6b0ec702ffdfd2c4eba",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/37289a18099fc7ce916933bd542926a7334791a3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/489b2158aec92a3fc256d70992416869f86e16e0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4f335cb8fad69b2be5accf0ebac3a8b345915f4e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/78b4d6463e9e69e5103f98b367f8984ad12cdc6f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9dc3c78d21e16f5af1a9c3d11b4bd5276f891fe0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vgem-fence: Fix potential deadlock on release\n\nA timer that expires a vgem fence automatically in 10 seconds is now\nreleased with timer_delete_sync() from fence->ops.release() called on last\ndma_fence_put().  In some scenarios, it can run in IRQ context, which is\nnot safe unless TIMER_IRQSAFE is used.  One potentially risky scenario was\ndemonstrated in Intel DRM CI trybot, BAT run on machine bat-adlp-6, while\nworking on new IGT subtests syncobj_timeline@stress-* as user space\nreplacements of some problematic test cases of a dma-fence-chain selftest\n[1].\n\n[117.004338] ================================\n[117.004340] WARNING: inconsistent lock state\n[117.004342] 6.17.0-rc7-CI_DRM_17270-g7644974e648c+ #1 Tainted: G S   U\n[117.004346] --------------------------------\n[117.004347] inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.\n[117.004349] swapper/0/0 [HC1[1]:SC1[1]:HE0:SE0] takes:\n[117.004352] ffff888138f86aa8 ((&fence->timer)){?.-.}-{0:0}, at: __timer_delete_sync+0x4b/0x190\n[117.004361] {HARDIRQ-ON-W} state was registered at:\n[117.004363]   lock_acquire+0xc4/0x2e0\n[117.004366]   call_timer_fn+0x80/0x2a0\n[117.004368]   __run_timers+0x231/0x310\n[117.004370]   run_timer_softirq+0x76/0xe0\n[117.004372]   handle_softirqs+0xd4/0x4d0\n[117.004375]   __irq_exit_rcu+0x13f/0x160\n[117.004377]   irq_exit_rcu+0xe/0x20\n[117.004379]   sysvec_apic_timer_interrupt+0xa0/0xc0\n[117.004382]   asm_sysvec_apic_timer_interrupt+0x1b/0x20\n[117.004385]   cpuidle_enter_state+0x12b/0x8a0\n[117.004388]   cpuidle_enter+0x2e/0x50\n[117.004393]   call_cpuidle+0x22/0x60\n[117.004395]   do_idle+0x1fd/0x260\n[117.004398]   cpu_startup_entry+0x29/0x30\n[117.004401]   start_secondary+0x12d/0x160\n[117.004404]   common_startup_64+0x13e/0x141\n[117.004407] irq event stamp: 2282669\n[117.004409] hardirqs last  enabled at (2282668): [<ffffffff8289db71>] _raw_spin_unlock_irqrestore+0x51/0x80\n[117.004414] hardirqs last disabled at (2282669): [<ffffffff82882021>] sysvec_irq_work+0x11/0xc0\n[117.004419] softirqs last  enabled at (2254702): [<ffffffff8289fd00>] __do_softirq+0x10/0x18\n[117.004423] softirqs last disabled at (2254725): [<ffffffff813d4ddf>] __irq_exit_rcu+0x13f/0x160\n[117.004426]\nother info that might help us debug this:\n[117.004429]  Possible unsafe locking scenario:\n[117.004432]        CPU0\n[117.004433]        ----\n[117.004434]   lock((&fence->timer));\n[117.004436]   <Interrupt>\n[117.004438]     lock((&fence->timer));\n[117.004440]\n *** DEADLOCK ***\n[117.004443] 1 lock held by swapper/0/0:\n[117.004445]  #0: ffffc90000003d50 ((&fence->timer)){?.-.}-{0:0}, at: call_timer_fn+0x7a/0x2a0\n[117.004450]\nstack backtrace:\n[117.004453] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G S   U              6.17.0-rc7-CI_DRM_17270-g7644974e648c+ #1 PREEMPT(voluntary)\n[117.004455] Tainted: [S]=CPU_OUT_OF_SPEC, [U]=USER\n[117.004455] Hardware name: Intel Corporation Alder Lake Client Platform/AlderLake-P DDR4 RVP, BIOS RPLPFWI1.R00.4035.A00.2301200723 01/20/2023\n[117.004456] Call Trace:\n[117.004456]  <IRQ>\n[117.004457]  dump_stack_lvl+0x91/0xf0\n[117.004460]  dump_stack+0x10/0x20\n[117.004461]  print_usage_bug.part.0+0x260/0x360\n[117.004463]  mark_lock+0x76e/0x9c0\n[117.004465]  ? register_lock_class+0x48/0x4a0\n[117.004467]  __lock_acquire+0xbc3/0x2860\n[117.004469]  lock_acquire+0xc4/0x2e0\n[117.004470]  ? __timer_delete_sync+0x4b/0x190\n[117.004472]  ? __timer_delete_sync+0x4b/0x190\n[117.004473]  __timer_delete_sync+0x68/0x190\n[117.004474]  ? __timer_delete_sync+0x4b/0x190\n[117.004475]  timer_delete_sync+0x10/0x20\n[117.004476]  vgem_fence_release+0x19/0x30 [vgem]\n[117.004478]  dma_fence_release+0xc1/0x3b0\n[117.004480]  ? dma_fence_release+0xa1/0x3b0\n[117.004481]  dma_fence_chain_release+0xe7/0x130\n[117.004483]  dma_fence_release+0xc1/0x3b0\n[117.004484]  ? _raw_spin_unlock_irqrestore+0x27/0x80\n[117.004485]  dma_fence_chain_irq_work+0x59/0x80\n[117.004487]  irq_work_single+0x75/0xa0\n[117.004490]  irq_work_r\n---truncated---"
    }
  ],
  "lastModified": "2026-06-17T09:59:32.223",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}