github - ghsa-q3xh-v3rf-7vqm

GHSA-Q3XH-V3RF-7VQM

Vulnerability from github – Published: 2025-12-16 15:30 – Updated: 2025-12-16 15:30

Details

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

mtdchar: fix integer overflow in read/write ioctls

The "req.start" and "req.len" variables are u64 values that come from the user at the start of the function. We mask away the high 32 bits of "req.len" so that's capped at U32_MAX but the "req.start" variable can go up to U64_MAX which means that the addition can still integer overflow.

Use check_add_overflow() to fix this bug.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-68237"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-16T14:15:58Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtdchar: fix integer overflow in read/write ioctls\n\nThe \"req.start\" and \"req.len\" variables are u64 values that come from the\nuser at the start of the function.  We mask away the high 32 bits of\n\"req.len\" so that\u0027s capped at U32_MAX but the \"req.start\" variable can go\nup to U64_MAX which means that the addition can still integer overflow.\n\nUse check_add_overflow() to fix this bug.",
  "id": "GHSA-q3xh-v3rf-7vqm",
  "modified": "2025-12-16T15:30:46Z",
  "published": "2025-12-16T15:30:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68237"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/37944f4f8199cd153fef74e95ca268020162f212"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/457376c6fbf0c69326a9bf1f72416225f681192b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e4185bed738da755b191aa3f2e16e8b48450e1b8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb9361484814fb12f3b7544b33835ea67d7a6a97"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f37efdd97fd1ec3e0d0f1eec279c8279e28f981e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-68237 (GCVE-0-2025-68237)

Vulnerability from cvelistv5 – Published: 2025-12-16 14:08 – Updated: 2025-12-16 14:08

Title

mtdchar: fix integer overflow in read/write ioctls

Summary

In the Linux kernel, the following vulnerability has been resolved: mtdchar: fix integer overflow in read/write ioctls The "req.start" and "req.len" variables are u64 values that come from the user at the start of the function. We mask away the high 32 bits of "req.len" so that's capped at U32_MAX but the "req.start" variable can go up to U64_MAX which means that the addition can still integer overflow. Use check_add_overflow() to fix this bug.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/f37efdd97fd1ec3e0…
	https://git.kernel.org/stable/c/457376c6fbf0c6932…
	https://git.kernel.org/stable/c/eb9361484814fb12f…
	https://git.kernel.org/stable/c/37944f4f8199cd153…
	https://git.kernel.org/stable/c/e4185bed738da755b…

Impacted products

Vendor

Product

Version

Linux

Affected: 6420ac0af95dbcb2fd8452e2d551ab50e1bbad83 , < f37efdd97fd1ec3e0d0f1eec279c8279e28f981e (git)
Affected: 6420ac0af95dbcb2fd8452e2d551ab50e1bbad83 , < 457376c6fbf0c69326a9bf1f72416225f681192b (git)
Affected: 6420ac0af95dbcb2fd8452e2d551ab50e1bbad83 , < eb9361484814fb12f3b7544b33835ea67d7a6a97 (git)
Affected: 6420ac0af95dbcb2fd8452e2d551ab50e1bbad83 , < 37944f4f8199cd153fef74e95ca268020162f212 (git)
Affected: 6420ac0af95dbcb2fd8452e2d551ab50e1bbad83 , < e4185bed738da755b191aa3f2e16e8b48450e1b8 (git)

Linux

Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.118 , ≤ 6.6.* (semver)
Unaffected: 6.12.60 , ≤ 6.12.* (semver)
Unaffected: 6.17.10 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/mtd/mtdchar.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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            },
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              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.118",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.60",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
                {
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    "datePublished": "2025-12-16T14:08:30.940Z",
    "dateReserved": "2025-12-16T13:41:40.258Z",
    "dateUpdated": "2025-12-16T14:08:30.940Z",
    "state": "PUBLISHED"
  },
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}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-Q3XH-V3RF-7VQM

CVE-2025-68237 (GCVE-0-2025-68237)

Tags

Sightings

Nomenclature