FKIE_CVE-2026-98205

Vulnerability from fkie_nvd - Published: 2026-10-06 09:18 - Updated: 2026-10-06 09:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: Input: evdev - zero absinfo before partial copy in EVIOCSABS The EVIOCSABS handler copies at most the user supplied ioctl size into an uninitialized on-stack struct input_absinfo: if (copy_from_user(&abs, p, min_t(size_t, size, sizeof(struct input_absinfo)))) The size comes from _IOC_SIZE() of the ioctl command and is therefore fully controlled by userspace. A short size leaves the trailing part of the structure holding whatever was on the kernel stack, and the whole structure is then stored into the device: dev->absinfo[t] = abs; EVIOCGABS hands that back to userspace, disclosing the stale stack bytes. Only the resolution field is currently cleared, which covers the legacy struct layout but not an arbitrarily short size. Zero the structure before the copy so any part not supplied by the caller reads back as zero. The existing resolution fixup is kept, since it also handles a size that partially overlaps that field.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/30b853a3d71f16bd0aa66b604bc37dd1254a19b3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3dfe48d5307a1ba22c58231d04257737015569ca
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/71e5619db11dd6429101bd967230d0321ec5ea26
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/89b6ffa4bc10c436fa9aecc73be105124cd58a35
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8b852965b8eaf910c314dc346967ed82c8d4f235
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/af5f7130cbf39e6e12336d0b7a5f6e76e4e1526b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c0aebb57b73c7d06ad21731099afe119b113c403
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e834e134a32b6a5c600fa539bb49146f617743ab
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": "c0aebb57b73c7d06ad21731099afe119b113c403",
              "status": "affected",
              "version": "448cd1664a573e69f54bfd32f3bb7220212b6cf5",
              "versionType": "git"
            },
            {
              "lessThan": "89b6ffa4bc10c436fa9aecc73be105124cd58a35",
              "status": "affected",
              "version": "448cd1664a573e69f54bfd32f3bb7220212b6cf5",
              "versionType": "git"
            },
            {
              "lessThan": "e834e134a32b6a5c600fa539bb49146f617743ab",
              "status": "affected",
              "version": "448cd1664a573e69f54bfd32f3bb7220212b6cf5",
              "versionType": "git"
            },
            {
              "lessThan": "af5f7130cbf39e6e12336d0b7a5f6e76e4e1526b",
              "status": "affected",
              "version": "448cd1664a573e69f54bfd32f3bb7220212b6cf5",
              "versionType": "git"
            },
            {
              "lessThan": "30b853a3d71f16bd0aa66b604bc37dd1254a19b3",
              "status": "affected",
              "version": "448cd1664a573e69f54bfd32f3bb7220212b6cf5",
              "versionType": "git"
            },
            {
              "lessThan": "71e5619db11dd6429101bd967230d0321ec5ea26",
              "status": "affected",
              "version": "448cd1664a573e69f54bfd32f3bb7220212b6cf5",
              "versionType": "git"
            },
            {
              "lessThan": "3dfe48d5307a1ba22c58231d04257737015569ca",
              "status": "affected",
              "version": "448cd1664a573e69f54bfd32f3bb7220212b6cf5",
              "versionType": "git"
            },
            {
              "lessThan": "8b852965b8eaf910c314dc346967ed82c8d4f235",
              "status": "affected",
              "version": "448cd1664a573e69f54bfd32f3bb7220212b6cf5",
              "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": "2.6.36"
            },
            {
              "lessThan": "2.6.36",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc4",
              "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 - zero absinfo before partial copy in EVIOCSABS\n\nThe EVIOCSABS handler copies at most the user supplied ioctl size into\nan uninitialized on-stack struct input_absinfo:\n\n\tif (copy_from_user(\u0026abs, p, min_t(size_t,\n\t\t\tsize, sizeof(struct input_absinfo))))\n\nThe size comes from _IOC_SIZE() of the ioctl command and is therefore\nfully controlled by userspace. A short size leaves the trailing part of\nthe structure holding whatever was on the kernel stack, and the whole\nstructure is then stored into the device:\n\n\tdev-\u003eabsinfo[t] = abs;\n\nEVIOCGABS hands that back to userspace, disclosing the stale stack\nbytes. Only the resolution field is currently cleared, which covers the\nlegacy struct layout but not an arbitrarily short size.\n\nZero the structure before the copy so any part not supplied by the\ncaller reads back as zero. The existing resolution fixup is kept, since\nit also handles a size that partially overlaps that field."
    }
  ],
  "id": "CVE-2026-98205",
  "lastModified": "2026-10-06T09:18:06.547",
  "metrics": {},
  "published": "2026-10-06T09:18:06.547",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/30b853a3d71f16bd0aa66b604bc37dd1254a19b3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3dfe48d5307a1ba22c58231d04257737015569ca"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/71e5619db11dd6429101bd967230d0321ec5ea26"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/89b6ffa4bc10c436fa9aecc73be105124cd58a35"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8b852965b8eaf910c314dc346967ed82c8d4f235"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/af5f7130cbf39e6e12336d0b7a5f6e76e4e1526b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c0aebb57b73c7d06ad21731099afe119b113c403"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e834e134a32b6a5c600fa539bb49146f617743ab"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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.



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.