GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-74422 (GCVE-0-2026-74422)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:59 – Updated: 2026-08-17 05:19
VLAI
Title
drm/rockchip: inno-hdmi: Switch to drmm_kzalloc()
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/rockchip: inno-hdmi: Switch to drmm_kzalloc() Driver makes use of drmm_encoder_init() to initialize the encoder and automatically handle the cleanup by registering drm_encoder_cleanup() with drmm_add_action(). However, the internal structure containing the encoder part gets allocated with devm_kzalloc(), which happens while component_bind_all() is being called from Rockchip DRM driver. The component framework further ensures it is deallocated as part of releasing all the resources claimed during bind, which is triggered from component_unbind_all(). When the reference to the DRM device gets eventually dropped via drm_dev_put() in rockchip_drm_unbind(), drmm_encoder_alloc_release() attempts to access the now released encoder structure, leading to use-after-free. Ensure driver's internal structure is still reachable on encoder cleanup by switching from a device-managed allocation to a drm-managed one.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 969325a2597ebc4cb001a92992f06f698ab2b467 , < 195ab348af4b2bdf5988f9397059317bb68fd797 (git)
Affected: 969325a2597ebc4cb001a92992f06f698ab2b467 , < 3cc50e7f73fcf79f28660b9d91566b13cb62e520 (git)
guessed Create a notification for this product.
Linux Linux Affected: 7.0
Unaffected: 0 , < 7.0 (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/rockchip/inno_hdmi-rockchip.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "195ab348af4b2bdf5988f9397059317bb68fd797",
              "status": "affected",
              "version": "969325a2597ebc4cb001a92992f06f698ab2b467",
              "versionType": "git"
            },
            {
              "lessThan": "3cc50e7f73fcf79f28660b9d91566b13cb62e520",
              "status": "affected",
              "version": "969325a2597ebc4cb001a92992f06f698ab2b467",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/rockchip/inno_hdmi-rockchip.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.0"
            },
            {
              "lessThan": "7.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/rockchip: inno-hdmi: Switch to drmm_kzalloc()\n\nDriver makes use of drmm_encoder_init() to initialize the encoder and\nautomatically handle the cleanup by registering drm_encoder_cleanup()\nwith drmm_add_action().\n\nHowever, the internal structure containing the encoder part gets\nallocated with devm_kzalloc(), which happens while component_bind_all()\nis being called from Rockchip DRM driver.  The component framework\nfurther ensures it is deallocated as part of releasing all the resources\nclaimed during bind, which is triggered from component_unbind_all().\n\nWhen the reference to the DRM device gets eventually dropped via\ndrm_dev_put() in rockchip_drm_unbind(), drmm_encoder_alloc_release()\nattempts to access the now released encoder structure, leading to\nuse-after-free.\n\nEnsure driver\u0027s internal structure is still reachable on encoder cleanup\nby switching from a device-managed allocation to a drm-managed one."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:19:07.404Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/195ab348af4b2bdf5988f9397059317bb68fd797"
        },
        {
          "url": "https://git.kernel.org/stable/c/3cc50e7f73fcf79f28660b9d91566b13cb62e520"
        }
      ],
      "title": "drm/rockchip: inno-hdmi: Switch to drmm_kzalloc()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74422",
    "datePublished": "2026-08-15T05:59:25.955Z",
    "dateReserved": "2026-08-15T05:44:03.894Z",
    "dateUpdated": "2026-08-17T05:19:07.404Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-74422",
      "date": "2026-09-05",
      "epss": "0.00145",
      "percentile": "0.04105"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-74422\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-15T06:22:44.293\",\"lastModified\":\"2026-08-17T06:19:37.633\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/rockchip: inno-hdmi: Switch to drmm_kzalloc()\\n\\nDriver makes use of drmm_encoder_init() to initialize the encoder and\\nautomatically handle the cleanup by registering drm_encoder_cleanup()\\nwith drmm_add_action().\\n\\nHowever, the internal structure containing the encoder part gets\\nallocated with devm_kzalloc(), which happens while component_bind_all()\\nis being called from Rockchip DRM driver.  The component framework\\nfurther ensures it is deallocated as part of releasing all the resources\\nclaimed during bind, which is triggered from component_unbind_all().\\n\\nWhen the reference to the DRM device gets eventually dropped via\\ndrm_dev_put() in rockchip_drm_unbind(), drmm_encoder_alloc_release()\\nattempts to access the now released encoder structure, leading to\\nuse-after-free.\\n\\nEnsure driver\u0027s internal structure is still reachable on encoder cleanup\\nby switching from a device-managed allocation to a drm-managed one.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/gpu/drm/rockchip/inno_hdmi-rockchip.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"969325a2597ebc4cb001a92992f06f698ab2b467\",\"lessThan\":\"195ab348af4b2bdf5988f9397059317bb68fd797\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"969325a2597ebc4cb001a92992f06f698ab2b467\",\"lessThan\":\"3cc50e7f73fcf79f28660b9d91566b13cb62e520\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/gpu/drm/rockchip/inno_hdmi-rockchip.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"7.0\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"7.0\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/195ab348af4b2bdf5988f9397059317bb68fd797\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3cc50e7f73fcf79f28660b9d91566b13cb62e520\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-20T22:19:03+00:00",
      "cve": "CVE-2026-74422",
      "id": "CVE-2026-74422",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/rockchip: inno-hdmi: Switch to drmm_kzalloc()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74422.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.