CVE-2026-99214 (GCVE-0-2026-99214)

Vulnerability from cvelistv5 – Published: 2026-10-28 10:36 – Updated: 2026-10-30 12:43
VLAI
Title
drm/vc4: hdmi: Move packet RAM enable to PM runtime
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/vc4: hdmi: Move packet RAM enable to PM runtime Audio can be triggered by the HPD handler and start up before video has been restored, calling vc4_hdmi_write_infoframe() for the audio infoframe. vc4_hdmi_write_infoframe() needs Packet RAM to be on to store the infoframe, however, if the video hasn't been enabled, vc4_hdmi_encoder_post_crtc_enable() hasn't been called and therefore, the Packet RAM can be disabled by the time vc4_hdmi_write_infoframe() executes, causing the following splat: [ 201.570266] ------------[ cut here ]------------ [ 201.570293] Packet RAM has to be on to store the packet. [ 201.570367] WARNING: drivers/gpu/drm/vc4/vc4_hdmi.c:683 at vc4_hdmi_write_infoframe+0x404/0x494 [vc4], CPU#0: wireplumber/1606 [...] [ 201.658650] Hardware name: Raspberry Pi 4 Model B Rev 1.5 (DT) [...] [ 201.758499] Call trace: [ 201.760967] vc4_hdmi_write_infoframe+0x404/0x494 [vc4] (P) [ 201.766607] vc4_hdmi_write_audio_infoframe+0x1c/0x28 [vc4] [ 201.772247] write_infoframe+0xbc/0x140 [drm_display_helper] [ 201.777975] drm_atomic_helper_connector_hdmi_update_audio_infoframe+0x80/0xdc [drm_display_helper] [ 201.787140] vc4_hdmi_audio_prepare+0x4ac/0x570 [vc4] [ 201.792252] drm_connector_hdmi_audio_prepare+0x24/0x30 [drm_display_helper] [ 201.799390] hdmi_codec_prepare+0x100/0x160 [snd_soc_hdmi_codec] [ 201.805471] snd_soc_pcm_dai_prepare+0xd4/0x100 [snd_soc_core] [ 201.811375] __soc_pcm_prepare+0x60/0x12c [snd_soc_core] [ 201.816752] soc_pcm_prepare+0x34/0x58 [snd_soc_core] [ 201.821863] snd_pcm_do_prepare+0x70/0x8c [snd_pcm] [ 201.826798] snd_pcm_action_nonatomic+0xe4/0x174 [snd_pcm] [ 201.832350] snd_pcm_prepare+0xc8/0xd8 [snd_pcm] [ 201.837021] snd_pcm_common_ioctl+0x458/0x614 [snd_pcm] [ 201.842308] snd_pcm_ioctl+0x30/0x48 [snd_pcm] [ 201.846802] __arm64_sys_ioctl+0x88/0xd8 [ 201.850769] invoke_syscall+0x48/0xf4 [ 201.854470] el0_svc_common+0x80/0xd8 [ 201.858171] do_el0_svc+0x1c/0x28 [ 201.861520] el0_svc+0x3c/0xb0 [ 201.864605] el0t_64_sync_handler+0x68/0xdc [ 201.868834] el0t_64_sync+0x198/0x19c [ 201.872536] ---[ end trace 0000000000000000 ]--- Considering that Packet RAM enable is essentially a power management configuration, move its enabling/disabling to the Runtime PM hooks. Note that post_crtc_disable() still stops all infoframes, but keeps Packet RAM enabled, leaving it to be disabled by runtime suspend.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6848 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: b47a72f30768ffe76e105b3e91ad7022003e8504 , < 03cf08ed84fd43cd7d90696736dcde15f5eefca6 (git)
Affected: b47a72f30768ffe76e105b3e91ad7022003e8504 , < 6b03e354526f6bad60ed3a7f08fec8b7d29d2f27 (git)
Affected: b47a72f30768ffe76e105b3e91ad7022003e8504 , < 6a987992c78e2e04f71e685d1c589f8ea2151fa2 (git)
Affected: b47a72f30768ffe76e105b3e91ad7022003e8504 , < 3f57b34485dc01e5a2db60a89a6ae5439a897e53 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.12.115 , ≤ 6.12.* (semver)
Unaffected: 6.18.59 , ≤ 6.18.* (semver)
Unaffected: 7.2.13 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/vc4/vc4_hdmi.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "version": "6.11"
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              "status": "unaffected",
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              "versionType": "semver"
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              "versionType": "semver"
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                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.18.59",
                  "versionStartIncluding": "6.11",
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: hdmi: Move packet RAM enable to PM runtime\n\nAudio can be triggered by the HPD handler and start up before video has\nbeen restored, calling vc4_hdmi_write_infoframe() for the audio infoframe.\nvc4_hdmi_write_infoframe() needs Packet RAM to be on to store the\ninfoframe, however, if the video hasn\u0027t been enabled,\nvc4_hdmi_encoder_post_crtc_enable() hasn\u0027t been called and therefore, the\nPacket RAM can be disabled by the time vc4_hdmi_write_infoframe() executes,\ncausing the following splat:\n\n[  201.570266] ------------[ cut here ]------------\n[  201.570293] Packet RAM has to be on to store the packet.\n[  201.570367] WARNING: drivers/gpu/drm/vc4/vc4_hdmi.c:683 at vc4_hdmi_write_infoframe+0x404/0x494 [vc4], CPU#0: wireplumber/1606\n[...]\n[  201.658650] Hardware name: Raspberry Pi 4 Model B Rev 1.5 (DT)\n[...]\n[  201.758499] Call trace:\n[  201.760967]  vc4_hdmi_write_infoframe+0x404/0x494 [vc4] (P)\n[  201.766607]  vc4_hdmi_write_audio_infoframe+0x1c/0x28 [vc4]\n[  201.772247]  write_infoframe+0xbc/0x140 [drm_display_helper]\n[  201.777975]  drm_atomic_helper_connector_hdmi_update_audio_infoframe+0x80/0xdc [drm_display_helper]\n[  201.787140]  vc4_hdmi_audio_prepare+0x4ac/0x570 [vc4]\n[  201.792252]  drm_connector_hdmi_audio_prepare+0x24/0x30 [drm_display_helper]\n[  201.799390]  hdmi_codec_prepare+0x100/0x160 [snd_soc_hdmi_codec]\n[  201.805471]  snd_soc_pcm_dai_prepare+0xd4/0x100 [snd_soc_core]\n[  201.811375]  __soc_pcm_prepare+0x60/0x12c [snd_soc_core]\n[  201.816752]  soc_pcm_prepare+0x34/0x58 [snd_soc_core]\n[  201.821863]  snd_pcm_do_prepare+0x70/0x8c [snd_pcm]\n[  201.826798]  snd_pcm_action_nonatomic+0xe4/0x174 [snd_pcm]\n[  201.832350]  snd_pcm_prepare+0xc8/0xd8 [snd_pcm]\n[  201.837021]  snd_pcm_common_ioctl+0x458/0x614 [snd_pcm]\n[  201.842308]  snd_pcm_ioctl+0x30/0x48 [snd_pcm]\n[  201.846802]  __arm64_sys_ioctl+0x88/0xd8\n[  201.850769]  invoke_syscall+0x48/0xf4\n[  201.854470]  el0_svc_common+0x80/0xd8\n[  201.858171]  do_el0_svc+0x1c/0x28\n[  201.861520]  el0_svc+0x3c/0xb0\n[  201.864605]  el0t_64_sync_handler+0x68/0xdc\n[  201.868834]  el0t_64_sync+0x198/0x19c\n[  201.872536] ---[ end trace 0000000000000000 ]---\n\nConsidering that Packet RAM enable is essentially a power management\nconfiguration, move its enabling/disabling to the Runtime PM hooks.\n\nNote that post_crtc_disable() still stops all infoframes, but keeps Packet\nRAM enabled, leaving it to be disabled by runtime suspend."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:43:00.909Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/03cf08ed84fd43cd7d90696736dcde15f5eefca6"
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          "url": "https://git.kernel.org/stable/c/6b03e354526f6bad60ed3a7f08fec8b7d29d2f27"
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          "url": "https://git.kernel.org/stable/c/6a987992c78e2e04f71e685d1c589f8ea2151fa2"
        },
        {
          "url": "https://git.kernel.org/stable/c/3f57b34485dc01e5a2db60a89a6ae5439a897e53"
        }
      ],
      "title": "drm/vc4: hdmi: Move packet RAM enable to PM runtime",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-99214",
    "datePublished": "2026-10-28T10:36:07.867Z",
    "dateReserved": "2026-09-25T10:25:14.401Z",
    "dateUpdated": "2026-10-30T12:43:00.909Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
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      "date": "2026-11-03",
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      "percentile": "0.04855"
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                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/gpu/drm/vc4/vc4_hdmi.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
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                    "status": "affected",
                    "version": "b47a72f30768ffe76e105b3e91ad7022003e8504",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "6b03e354526f6bad60ed3a7f08fec8b7d29d2f27",
                    "status": "affected",
                    "version": "b47a72f30768ffe76e105b3e91ad7022003e8504",
                    "versionType": "git"
                  },
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                    "lessThan": "6a987992c78e2e04f71e685d1c589f8ea2151fa2",
                    "status": "affected",
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                    "versionType": "git"
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                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "6.11"
                  },
                  {
                    "lessThan": "6.11",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.115",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.59",
                    "versionType": "semver"
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                  {
                    "lessThanOrEqual": "7.2.*",
                    "status": "unaffected",
                    "version": "7.2.13",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.3",
                    "versionType": "original_commit_for_fix"
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              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: hdmi: Move packet RAM enable to PM runtime\n\nAudio can be triggered by the HPD handler and start up before video has\nbeen restored, calling vc4_hdmi_write_infoframe() for the audio infoframe.\nvc4_hdmi_write_infoframe() needs Packet RAM to be on to store the\ninfoframe, however, if the video hasn\u0027t been enabled,\nvc4_hdmi_encoder_post_crtc_enable() hasn\u0027t been called and therefore, the\nPacket RAM can be disabled by the time vc4_hdmi_write_infoframe() executes,\ncausing the following splat:\n\n[  201.570266] ------------[ cut here ]------------\n[  201.570293] Packet RAM has to be on to store the packet.\n[  201.570367] WARNING: drivers/gpu/drm/vc4/vc4_hdmi.c:683 at vc4_hdmi_write_infoframe+0x404/0x494 [vc4], CPU#0: wireplumber/1606\n[...]\n[  201.658650] Hardware name: Raspberry Pi 4 Model B Rev 1.5 (DT)\n[...]\n[  201.758499] Call trace:\n[  201.760967]  vc4_hdmi_write_infoframe+0x404/0x494 [vc4] (P)\n[  201.766607]  vc4_hdmi_write_audio_infoframe+0x1c/0x28 [vc4]\n[  201.772247]  write_infoframe+0xbc/0x140 [drm_display_helper]\n[  201.777975]  drm_atomic_helper_connector_hdmi_update_audio_infoframe+0x80/0xdc [drm_display_helper]\n[  201.787140]  vc4_hdmi_audio_prepare+0x4ac/0x570 [vc4]\n[  201.792252]  drm_connector_hdmi_audio_prepare+0x24/0x30 [drm_display_helper]\n[  201.799390]  hdmi_codec_prepare+0x100/0x160 [snd_soc_hdmi_codec]\n[  201.805471]  snd_soc_pcm_dai_prepare+0xd4/0x100 [snd_soc_core]\n[  201.811375]  __soc_pcm_prepare+0x60/0x12c [snd_soc_core]\n[  201.816752]  soc_pcm_prepare+0x34/0x58 [snd_soc_core]\n[  201.821863]  snd_pcm_do_prepare+0x70/0x8c [snd_pcm]\n[  201.826798]  snd_pcm_action_nonatomic+0xe4/0x174 [snd_pcm]\n[  201.832350]  snd_pcm_prepare+0xc8/0xd8 [snd_pcm]\n[  201.837021]  snd_pcm_common_ioctl+0x458/0x614 [snd_pcm]\n[  201.842308]  snd_pcm_ioctl+0x30/0x48 [snd_pcm]\n[  201.846802]  __arm64_sys_ioctl+0x88/0xd8\n[  201.850769]  invoke_syscall+0x48/0xf4\n[  201.854470]  el0_svc_common+0x80/0xd8\n[  201.858171]  do_el0_svc+0x1c/0x28\n[  201.861520]  el0_svc+0x3c/0xb0\n[  201.864605]  el0t_64_sync_handler+0x68/0xdc\n[  201.868834]  el0t_64_sync+0x198/0x19c\n[  201.872536] ---[ end trace 0000000000000000 ]---\n\nConsidering that Packet RAM enable is essentially a power management\nconfiguration, move its enabling/disabling to the Runtime PM hooks.\n\nNote that post_crtc_disable() still stops all infoframes, but keeps Packet\nRAM enabled, leaving it to be disabled by runtime suspend."
          }
        ],
        "id": "CVE-2026-99214",
        "lastModified": "2026-10-30T13:21:53.587",
        "metrics": {},
        "published": "2026-10-28T11:17:42.887",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/03cf08ed84fd43cd7d90696736dcde15f5eefca6"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/3f57b34485dc01e5a2db60a89a6ae5439a897e53"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/6a987992c78e2e04f71e685d1c589f8ea2151fa2"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/6b03e354526f6bad60ed3a7f08fec8b7d29d2f27"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-10-29T09:02:25+00:00",
      "cve": "CVE-2026-99214",
      "id": "CVE-2026-99214",
      "initial_release_date": "2026-10-28T00:00:00+00:00",
      "product_status:known_not_affected": "278",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/vc4: hdmi: Move packet RAM enable to PM runtime",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-99214.json",
      "version": "3"
    }
  }
}



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