CVE-2026-52948 (GCVE-0-2026-52948)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:26 – Updated: 2026-06-29 04:18
VLAI
Title
i2c: dev: prevent integer overflow in I2C_TIMEOUT ioctl
Summary
In the Linux kernel, the following vulnerability has been resolved: i2c: dev: prevent integer overflow in I2C_TIMEOUT ioctl While fuzzing with Syzkaller, a persistent `schedule_timeout: wrong timeout value` warning was observed, accompanied by SMBus controller state machine corruption. The I2C_TIMEOUT ioctl accepts a user-provided timeout in multiples of 10 ms. The user argument is checked against INT_MAX, but it is subsequently multiplied by 10 before being passed to msecs_to_jiffies(). A malicious user can pass a large value (e.g., 429496729) that passes the `arg > INT_MAX` check but overflows when multiplied by 10. This results in a truncated 32-bit unsigned value that bypasses the internal `(int)m < 0` check in `msecs_to_jiffies()`. The truncated value is then assigned to `client->adapter->timeout` (a signed 32-bit int), which is reinterpreted as a negative number. When passed to wait_for_completion_timeout(), this negative value undergoes sign extension to a 64-bit unsigned long, triggering the `schedule_timeout` warning and causing premature returns. This leaves the SMBus state machine in an unrecoverable state, constituting a local Denial of Service (DoS). Fix this by bounding the user argument to `INT_MAX / 10`. [wsa: move the comment as well]
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d , < e9ffd5f5050fbb199d270a85614cd27ebed6fbac (git)
Affected: cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d , < 0b88ecfbc9dc33b4db8836c37b50cf174e6c0691 (git)
Affected: cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d , < 943e318eedbeaeea08ece3f5dd44c982f4ed2ef5 (git)
Affected: cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d , < aa6ef734016912653a909477fb30aeb66c98b3a2 (git)
Affected: cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d , < ff02add34ffd03449b8115904ebe2ec4fed022d4 (git)
Affected: cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d , < ffbcf31f032eb454ebfd29309f51366fe57f4ac4 (git)
Affected: cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d , < 4576621dc6577f21a032acfd16c3ad61907a5ea7 (git)
Affected: cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d , < 617eb7c0961a8dfcfc811844a6396e406b2923ea (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.29
Unaffected: 0 , < 2.6.29 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.94 , ≤ 6.12.* (semver)
Unaffected: 6.18.36 , ≤ 6.18.* (semver)
Unaffected: 7.0.13 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: dev: prevent integer overflow in I2C_TIMEOUT ioctl\n\nWhile fuzzing with Syzkaller, a persistent `schedule_timeout: wrong\ntimeout value` warning was observed, accompanied by SMBus controller\nstate machine corruption.\n\nThe I2C_TIMEOUT ioctl accepts a user-provided timeout in multiples of\n10 ms. The user argument is checked against INT_MAX, but it is\nsubsequently multiplied by 10 before being passed to msecs_to_jiffies().\n\nA malicious user can pass a large value (e.g., 429496729) that passes\nthe `arg \u003e INT_MAX` check but overflows when multiplied by 10. This\nresults in a truncated 32-bit unsigned value that bypasses the\ninternal `(int)m \u003c 0` check in `msecs_to_jiffies()`.\n\nThe truncated value is then assigned to `client-\u003eadapter-\u003etimeout`\n(a signed 32-bit int), which is reinterpreted as a negative number.\nWhen passed to wait_for_completion_timeout(), this negative value\nundergoes sign extension to a 64-bit unsigned long, triggering the\n`schedule_timeout` warning and causing premature returns. This leaves\nthe SMBus state machine in an unrecoverable state, constituting a\nlocal Denial of Service (DoS).\n\nFix this by bounding the user argument to `INT_MAX / 10`.\n\n[wsa: move the comment as well]"
          }
        ],
        "id": "CVE-2026-52948",
        "lastModified": "2026-07-14T16:58:13.780",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2026-06-24T17:17:04.900",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0b88ecfbc9dc33b4db8836c37b50cf174e6c0691"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/4576621dc6577f21a032acfd16c3ad61907a5ea7"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/617eb7c0961a8dfcfc811844a6396e406b2923ea"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/943e318eedbeaeea08ece3f5dd44c982f4ed2ef5"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/aa6ef734016912653a909477fb30aeb66c98b3a2"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/e9ffd5f5050fbb199d270a85614cd27ebed6fbac"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/ff02add34ffd03449b8115904ebe2ec4fed022d4"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/ffbcf31f032eb454ebfd29309f51366fe57f4ac4"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-190"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-07-14T18:08:02+00:00",
      "cve": "CVE-2026-52948",
      "id": "CVE-2026-52948",
      "initial_release_date": "2026-06-24T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: i2c: dev: prevent integer overflow in I2C_TIMEOUT ioctl",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52948.json",
      "version": "3"
    }
  }
}



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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.

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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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.