CVE-2025-21688

Estado: ModificadaMedia (4.7)—

In the Linux kernel, the following vulnerability has been resolved:

drm/v3d: Assign job pointer to NULL before signaling the fence

In commit e4b5ccd392b9 ("drm/v3d: Ensure job pointer is set to NULL after job completion"), we introduced a change to assign the job pointer to NULL after completing a job, indicating job completion.

However, this approach created a race condition between the DRM scheduler workqueue and the IRQ execution thread. As soon as the fence is signaled in the IRQ execution thread, a new job starts to be executed. This results in a race condition where the IRQ execution thread sets the job pointer to NULL simultaneously as the `run_job()` function assigns a new job to the pointer.

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This race condition can lead to a NULL pointer dereference if the IRQ execution thread sets the job pointer to NULL after `run_job()` assigns it to the new job. When the new job completes and the GPU emits an interrupt, `v3d_irq()` is triggered, potentially causing a crash.

Detalles técnicos trazas, registros y código del informe original

[  466.310099] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000c0
[  466.318928] Mem abort info:
[  466.321723]   ESR = 0x0000000096000005
[  466.325479]   EC = 0x25: DABT (current EL), IL = 32 bits
[  466.330807]   SET = 0, FnV = 0
[  466.333864]   EA = 0, S1PTW = 0
[  466.337010]   FSC = 0x05: level 1 translation fault
[  466.341900] Data abort info:
[  466.344783]   ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
[  466.350285]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
[  466.355350]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[  466.360677] user pgtable: 4k pages, 39-bit VAs, pgdp=0000000089772000
[  466.367140] [00000000000000c0] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000
[  466.375875] Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
[  466.382163] Modules linked in: rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device algif_hash algif_skcipher af_alg bnep binfmt_misc vc4 snd_soc_hdmi_codec drm_display_helper cec brcmfmac_wcc spidev rpivid_hevc(C) drm_client_lib brcmfmac hci_uart drm_dma_helper pisp_be btbcm brcmutil snd_soc_core aes_ce_blk v4l2_mem2mem bluetooth aes_ce_cipher snd_compress videobuf2_dma_contig ghash_ce cfg80211 gf128mul snd_pcm_dmaengine videobuf2_memops ecdh_generic sha2_ce ecc videobuf2_v4l2 snd_pcm v3d sha256_arm64 rfkill videodev snd_timer sha1_ce libaes gpu_sched snd videobuf2_common sha1_generic drm_shmem_helper mc rp1_pio drm_kms_helper raspberrypi_hwmon spi_bcm2835 gpio_keys i2c_brcmstb rp1 raspberrypi_gpiomem rp1_mailbox rp1_adc nvmem_rmem uio_pdrv_genirq uio i2c_dev drm ledtrig_pattern drm_panel_orientation_quirks backlight fuse dm_mod ip_tables x_tables ipv6
[  466.458429] CPU: 0 UID: 1000 PID: 2008 Comm: chromium Tainted: G         C         6.13.0-v8+ #18
[  466.467336] Tainted: [C]=CRAP
[  466.470306] Hardware name: Raspberry Pi 5 Model B Rev 1.0 (DT)
[  466.476157] pstate: 404000c9 (nZcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[  466.483143] pc : v3d_irq+0x118/0x2e0 [v3d]
[  466.487258] lr : __handle_irq_event_percpu+0x60/0x228
[  466.492327] sp : ffffffc080003ea0
[  466.495646] x29: ffffffc080003ea0 x28: ffffff80c0c94200 x27: 0000000000000000
[  466.502807] x26: ffffffd08dd81d7b x25: ffffff80c0c94200 x24: ffffff8003bdc200
[  466.509969] x23: 0000000000000001 x22: 00000000000000a7 x21: 0000000000000000
[  466.517130] x20: ffffff8041bb0000 x19: 0000000000000001 x18: 0000000000000000
[  466.524291] x17: ffffffafadfb0000 x16: ffffffc080000000 x15: 0000000000000000
[  466.531452] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000
[  466.538613] x11: 0000000000000000 x10: 0000000000000000 x9 : ffffffd08c527eb0
[  466.545777] x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
[  466.552941] x5 : ffffffd08c4100d0 x4 : ffffffafadfb0000 x3 : ffffffc080003f70
[  466.560102] x2 : ffffffc0829e8058 x1 : 0000000000000001 x0 : 0000000000000000
[  466.567263] Call trace:
[  466.569711]  v3d_irq+0x118/0x2e0 [v3d] (P)
[  466.
---truncated---

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 4.7

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.18%
Percentil entre todas las CVEs puntuadas: 7
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-362
CWE-362

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-21688",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "id": "CVE-2025-21688",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
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            {
              "automatable": "no"
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2025-10-01T19:51:34.280030Z"
        }
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          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
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        "impactScore": 3.6,
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        "cvssData": {
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          "integrityImpact": "NONE",
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          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "vendor": "Linux",
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            {
              "status": "affected",
              "version": "1bd6303d08c85072ce40ac01a767ab67195105bd",
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              "versionType": "git"
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            {
              "status": "affected",
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              "versionType": "git"
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            {
              "status": "affected",
              "version": "14e0a874488e79086340ba8e2d238cb9596b68a8",
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              "versionType": "git"
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            {
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              "lessThan": "01a7e3a43ee2e6607169a75889412344c10b37fd",
              "versionType": "git"
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            {
              "status": "affected",
              "version": "e4b5ccd392b92300a2b341705cc4805681094e49",
              "lessThan": "3059e7aaa280daea57bb069fbc65225e1bb95014",
              "versionType": "git"
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            {
              "status": "affected",
              "version": "e4b5ccd392b92300a2b341705cc4805681094e49",
              "lessThan": "6e64d6b3a3c39655de56682ec83e894978d23412",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5.15.177",
              "lessThan": "5.15.178",
              "versionType": "semver"
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            {
              "status": "affected",
              "version": "6.1.127",
              "lessThan": "6.1.128",
              "versionType": "semver"
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            {
              "status": "affected",
              "version": "6.6.74",
              "lessThan": "6.6.75",
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            {
              "status": "affected",
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              "lessThan": "6.12.12",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/v3d/v3d_irq.c"
          ],
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        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
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            {
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              "lessThan": "6.13",
              "versionType": "semver"
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              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
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            {
              "status": "unaffected",
              "version": "6.1.128",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
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            {
              "status": "unaffected",
              "version": "6.6.75",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.12",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.13.1",
              "versionType": "semver",
              "lessThanOrEqual": "6.13.*"
            },
            {
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/v3d/v3d_irq.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-02-10T16:15:38.323",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/01a7e3a43ee2e6607169a75889412344c10b37fd",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1f66a3a1a516e4d545906916b3f3c8d1c5e909e6",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3059e7aaa280daea57bb069fbc65225e1bb95014",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/431fb709db434565b5e7cee82a11bd681a794fd3",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6cfafcad46e95351c477da0ae7e3acb8f7550ada",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6e64d6b3a3c39655de56682ec83e894978d23412",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9793206fbf5293534c3a79d78f196e2cbb48c22d",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
      "url": "https://git.kernel.org/stable/c/a9401cd5d1bb5a0b8d2bef09623ca43551cd6e8a",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/v3d: Assign job pointer to NULL before signaling the fence\n\nIn commit e4b5ccd392b9 (\"drm/v3d: Ensure job pointer is set to NULL\nafter job completion\"), we introduced a change to assign the job pointer\nto NULL after completing a job, indicating job completion.\n\nHowever, this approach created a race condition between the DRM\nscheduler workqueue and the IRQ execution thread. As soon as the fence is\nsignaled in the IRQ execution thread, a new job starts to be executed.\nThis results in a race condition where the IRQ execution thread sets the\njob pointer to NULL simultaneously as the `run_job()` function assigns\na new job to the pointer.\n\nThis race condition can lead to a NULL pointer dereference if the IRQ\nexecution thread sets the job pointer to NULL after `run_job()` assigns\nit to the new job. When the new job completes and the GPU emits an\ninterrupt, `v3d_irq()` is triggered, potentially causing a crash.\n\n[  466.310099] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000c0\n[  466.318928] Mem abort info:\n[  466.321723]   ESR = 0x0000000096000005\n[  466.325479]   EC = 0x25: DABT (current EL), IL = 32 bits\n[  466.330807]   SET = 0, FnV = 0\n[  466.333864]   EA = 0, S1PTW = 0\n[  466.337010]   FSC = 0x05: level 1 translation fault\n[  466.341900] Data abort info:\n[  466.344783]   ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000\n[  466.350285]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0\n[  466.355350]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n[  466.360677] user pgtable: 4k pages, 39-bit VAs, pgdp=0000000089772000\n[  466.367140] [00000000000000c0] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000\n[  466.375875] Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP\n[  466.382163] Modules linked in: rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device algif_hash algif_skcipher af_alg bnep binfmt_misc vc4 snd_soc_hdmi_codec drm_display_helper cec brcmfmac_wcc spidev rpivid_hevc(C) drm_client_lib brcmfmac hci_uart drm_dma_helper pisp_be btbcm brcmutil snd_soc_core aes_ce_blk v4l2_mem2mem bluetooth aes_ce_cipher snd_compress videobuf2_dma_contig ghash_ce cfg80211 gf128mul snd_pcm_dmaengine videobuf2_memops ecdh_generic sha2_ce ecc videobuf2_v4l2 snd_pcm v3d sha256_arm64 rfkill videodev snd_timer sha1_ce libaes gpu_sched snd videobuf2_common sha1_generic drm_shmem_helper mc rp1_pio drm_kms_helper raspberrypi_hwmon spi_bcm2835 gpio_keys i2c_brcmstb rp1 raspberrypi_gpiomem rp1_mailbox rp1_adc nvmem_rmem uio_pdrv_genirq uio i2c_dev drm ledtrig_pattern drm_panel_orientation_quirks backlight fuse dm_mod ip_tables x_tables ipv6\n[  466.458429] CPU: 0 UID: 1000 PID: 2008 Comm: chromium Tainted: G         C         6.13.0-v8+ #18\n[  466.467336] Tainted: [C]=CRAP\n[  466.470306] Hardware name: Raspberry Pi 5 Model B Rev 1.0 (DT)\n[  466.476157] pstate: 404000c9 (nZcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[  466.483143] pc : v3d_irq+0x118/0x2e0 [v3d]\n[  466.487258] lr : __handle_irq_event_percpu+0x60/0x228\n[  466.492327] sp : ffffffc080003ea0\n[  466.495646] x29: ffffffc080003ea0 x28: ffffff80c0c94200 x27: 0000000000000000\n[  466.502807] x26: ffffffd08dd81d7b x25: ffffff80c0c94200 x24: ffffff8003bdc200\n[  466.509969] x23: 0000000000000001 x22: 00000000000000a7 x21: 0000000000000000\n[  466.517130] x20: ffffff8041bb0000 x19: 0000000000000001 x18: 0000000000000000\n[  466.524291] x17: ffffffafadfb0000 x16: ffffffc080000000 x15: 0000000000000000\n[  466.531452] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000\n[  466.538613] x11: 0000000000000000 x10: 0000000000000000 x9 : ffffffd08c527eb0\n[  466.545777] x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000\n[  466.552941] x5 : ffffffd08c4100d0 x4 : ffffffafadfb0000 x3 : ffffffc080003f70\n[  466.560102] x2 : ffffffc0829e8058 x1 : 0000000000000001 x0 : 0000000000000000\n[  466.567263] Call trace:\n[  466.569711]  v3d_irq+0x118/0x2e0 [v3d] (P)\n[  466.\n---truncated---"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/v3d: Asignar puntero de trabajo a NULL antes de señalar la valla En el commit e4b5ccd392b9 (\"drm/v3d: Asegurarse de que el puntero de trabajo esté establecido en NULL después de la finalización del trabajo\"), introdujimos un cambio para asignar el puntero de trabajo a NULL después de completar un trabajo, lo que indica la finalización del trabajo. Sin embargo, este enfoque creó una condición de ejecución entre la cola de trabajo del programador DRM y el hilo de ejecución de IRQ. Tan pronto como se señala la valla en el hilo de ejecución de IRQ, comienza a ejecutarse un nuevo trabajo. Esto da como resultado una condición de ejecución donde el hilo de ejecución de IRQ establece el puntero de trabajo en NULL simultáneamente mientras la función `run_job()` asigna un nuevo trabajo al puntero. Esta condición de ejecución puede conducir a una desreferencia de puntero NULL si el hilo de ejecución de IRQ establece el puntero de trabajo en NULL después de que `run_job()` lo asigne al nuevo trabajo. Cuando se completa el nuevo trabajo y la GPU emite una interrupción, se activa `v3d_irq()`, lo que puede provocar un bloqueo. [ 466.310099] No se puede gestionar la desreferencia del puntero NULL del núcleo en la dirección virtual 00000000000000c0 [ 466.318928] Mem abort info: [ 466.321723] ESR = 0x0000000096000005 [ 466.325479] EC = 0x25: DABT (current EL), IL = 32 bits [ 466.330807] SET = 0, FnV = 0 [ 466.333864] EA = 0, S1PTW = 0 [ 466.337010] FSC = 0x05: level 1 translation fault [ 466.341900] Data abort info: [ 466.344783] ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 [ 466.350285] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 [ 466.355350] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [ 466.360677] user pgtable: 4k pages, 39-bit VAs, pgdp=0000000089772000 [ 466.367140] [00000000000000c0] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000 [ 466.375875] Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP [ 466.382163] Modules linked in: rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device algif_hash algif_skcipher af_alg bnep binfmt_misc vc4 snd_soc_hdmi_codec drm_display_helper cec brcmfmac_wcc spidev rpivid_hevc(C) drm_client_lib brcmfmac hci_uart drm_dma_helper pisp_be btbcm brcmutil snd_soc_core aes_ce_blk v4l2_mem2mem bluetooth aes_ce_cipher snd_compress videobuf2_dma_contig ghash_ce cfg80211 gf128mul snd_pcm_dmaengine videobuf2_memops ecdh_generic sha2_ce ecc videobuf2_v4l2 snd_pcm v3d sha256_arm64 rfkill videodev snd_timer sha1_ce libaes gpu_sched snd videobuf2_common sha1_generic drm_shmem_helper mc rp1_pio drm_kms_helper raspberrypi_hwmon spi_bcm2835 gpio_keys i2c_brcmstb rp1 raspberrypi_gpiomem rp1_mailbox rp1_adc nvmem_rmem uio_pdrv_genirq uio i2c_dev drm ledtrig_pattern drm_panel_orientation_quirks backlight fuse dm_mod ip_tables x_tables ipv6 [ 466.458429] CPU: 0 UID: 1000 PID: 2008 Comm: chromium Tainted: G C 6.13.0-v8+ #18 [ 466.467336] Tainted: [C]=CRAP [ 466.470306] Hardware name: Raspberry Pi 5 Model B Rev 1.0 (DT) [ 466.476157] pstate: 404000c9 (nZcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 466.483143] pc : v3d_irq+0x118/0x2e0 [v3d] [ 466.487258] lr : __handle_irq_event_percpu+0x60/0x228 [ 466.492327] sp : ffffffc080003ea0 [ 466.495646] x29: ffffffc080003ea0 x28: ffffff80c0c94200 x27: 0000000000000000 [ 466.502807] x26: ffffffd08dd81d7b x25: ffffff80c0c94200 x24: ffffff8003bdc200 [ 466.509969] x23: 0000000000000001 x22: 00000000000000a7 x21: 0000000000000000 [ 466.517130] x20: ffffff8041bb0000 x19: 0000000000000001 x18: 0000000000000000 [ 466.524291] x17: ffffffafadfb0000 x16: ffffffc080000000 x15: 0000000000000000 [ 466.531452] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 [ 466.538613] x11: 0000000000000000 x10: 0000000000000000 x9 : ffffffd08c527eb0 [ 466.545777] x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 [ 466.552941] x5 : ffffffd08c4100d0 x4 : ffffffafadfb0000 x3 : ffffffc080003f70  ---truncated--- "
    }
  ],
  "lastModified": "2026-06-17T08:44:01.470",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.15.177:*:*:*:*:*:*:*",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}