FKIE_CVE-2026-74673

Vulnerability from fkie_nvd - Published: 2026-08-22 16:16 - Updated: 2026-10-14 13:10
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: Input: evdev - fix information leak in evdev_pass_values() In evdev_pass_values(), the input_event structure is allocated on the kernel stack and populated field-by-field. However, it is never fully initialized. On architectures where struct input_event contains explicit or implicit padding (such as the 32-bit __pad field on SPARC64), these padding bytes are left uninitialized. When this event structure is subsequently passed to the client buffer and later copied to userspace, the uninitialized padding bytes leak kernel stack memory, potentially exposing sensitive information. Similar issues exist in __evdev_queue_syn_dropped and __pass_event. Fix this by explicitly zeroing the entire event structure with memset() before populating its fields. This ensures all padding bytes are cleared before the data crosses the security boundary.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/06a286b320236508d02ab2ccc9496352748652a8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7d17e9454a9af3ec7aebb88b41a9deedd5b19a6b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7e55ca1080f09d9f7112c7f20ac31f682c1f2374
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/90f305f2c7a30257c683e13f4bf7c798eea992a0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bd3c4108a56de34380edab670065e86283cb3029
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c6d5fa46c1ee25d068fc730fd377f0f54188d290
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d2e3839419ac4047835762c4d7712bda1101b57e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e748811d9b80a3e101110ff4b3c612e5fca54d98
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/evdev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d2e3839419ac4047835762c4d7712bda1101b57e",
              "status": "affected",
              "version": "6addb1d6de1968b84852f54561cc9a999909b5a9",
              "versionType": "git"
            },
            {
              "lessThan": "c6d5fa46c1ee25d068fc730fd377f0f54188d290",
              "status": "affected",
              "version": "6addb1d6de1968b84852f54561cc9a999909b5a9",
              "versionType": "git"
            },
            {
              "lessThan": "e748811d9b80a3e101110ff4b3c612e5fca54d98",
              "status": "affected",
              "version": "6addb1d6de1968b84852f54561cc9a999909b5a9",
              "versionType": "git"
            },
            {
              "lessThan": "06a286b320236508d02ab2ccc9496352748652a8",
              "status": "affected",
              "version": "6addb1d6de1968b84852f54561cc9a999909b5a9",
              "versionType": "git"
            },
            {
              "lessThan": "7d17e9454a9af3ec7aebb88b41a9deedd5b19a6b",
              "status": "affected",
              "version": "6addb1d6de1968b84852f54561cc9a999909b5a9",
              "versionType": "git"
            },
            {
              "lessThan": "bd3c4108a56de34380edab670065e86283cb3029",
              "status": "affected",
              "version": "6addb1d6de1968b84852f54561cc9a999909b5a9",
              "versionType": "git"
            },
            {
              "lessThan": "7e55ca1080f09d9f7112c7f20ac31f682c1f2374",
              "status": "affected",
              "version": "6addb1d6de1968b84852f54561cc9a999909b5a9",
              "versionType": "git"
            },
            {
              "lessThan": "90f305f2c7a30257c683e13f4bf7c798eea992a0",
              "status": "affected",
              "version": "6addb1d6de1968b84852f54561cc9a999909b5a9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/evdev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.24"
            },
            {
              "lessThan": "2.6.24",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: evdev - fix information leak in evdev_pass_values()\n\nIn evdev_pass_values(), the input_event structure is allocated on the\nkernel stack and populated field-by-field. However, it is never fully\ninitialized. On architectures where struct input_event contains explicit\nor implicit padding (such as the 32-bit __pad field on SPARC64), these\npadding bytes are left uninitialized.\n\nWhen this event structure is subsequently passed to the client buffer\nand later copied to userspace, the uninitialized padding bytes leak\nkernel stack memory, potentially exposing sensitive information.\n\nSimilar issues exist in __evdev_queue_syn_dropped and __pass_event.\n\nFix this by explicitly zeroing the entire event structure with memset()\nbefore populating its fields. This ensures all padding bytes are cleared\nbefore the data crosses the security boundary."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nInput: evdev - corrige fuga de informaci\u00f3n en evdev_pass_values()\n\nEn evdev_pass_values(), la estructura input_event se asigna en la pila del kernel y se rellena campo por campo. Sin embargo, nunca se inicializa completamente. En arquitecturas donde la estructura input_event contiene relleno expl\u00edcito o impl\u00edcito (como el campo __pad de 32 bits en SPARC64), estos bytes de relleno se dejan sin inicializar.\n\nCuando esta estructura de evento se pasa posteriormente al b\u00fafer del cliente y luego se copia al espacio de usuario, los bytes de relleno sin inicializar fugan memoria de la pila del kernel, exponiendo potencialmente informaci\u00f3n sensible.\n\nProblemas similares existen en __evdev_queue_syn_dropped y __pass_event.\n\nSolucione esto poniendo a cero expl\u00edcitamente toda la estructura de evento con memset() antes de rellenar sus campos. Esto asegura que todos los bytes de relleno se borren antes de que los datos crucen el l\u00edmite de seguridad."
    }
  ],
  "id": "CVE-2026-74673",
  "lastModified": "2026-10-14T13:10:00.187",
  "metrics": {},
  "published": "2026-08-22T16:16:41.347",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/06a286b320236508d02ab2ccc9496352748652a8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7d17e9454a9af3ec7aebb88b41a9deedd5b19a6b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7e55ca1080f09d9f7112c7f20ac31f682c1f2374"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/90f305f2c7a30257c683e13f4bf7c798eea992a0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bd3c4108a56de34380edab670065e86283cb3029"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c6d5fa46c1ee25d068fc730fd377f0f54188d290"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d2e3839419ac4047835762c4d7712bda1101b57e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e748811d9b80a3e101110ff4b3c612e5fca54d98"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.