CVE-2023-53651 (GCVE-0-2023-53651)
Vulnerability from cvelistv5
Published
2025-10-07 15:19
Modified
2026-08-05 09:15
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: Input: exc3000 - properly stop timer on shutdown We need to stop the timer on driver unbind or probe failures, otherwise we get UAF/Oops.
References
Impacted products
Vendor Product Version
Linux Linux Version: 7e577a17f2eefeef32f1106ebf91e7cd143ba654
Version: 7e577a17f2eefeef32f1106ebf91e7cd143ba654
Version: 7e577a17f2eefeef32f1106ebf91e7cd143ba654
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/touchscreen/exc3000.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "526a177ac6353d65057eadb5d6edafc168f64484",
              "status": "affected",
              "version": "7e577a17f2eefeef32f1106ebf91e7cd143ba654",
              "versionType": "git"
            },
            {
              "lessThan": "bee57c20fc0ca5ef9b9a53a0335eab2ac9e9cae1",
              "status": "affected",
              "version": "7e577a17f2eefeef32f1106ebf91e7cd143ba654",
              "versionType": "git"
            },
            {
              "lessThan": "79c81d137d36f9635bbcbc3916c0cccb418a61dd",
              "status": "affected",
              "version": "7e577a17f2eefeef32f1106ebf91e7cd143ba654",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/touchscreen/exc3000.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.15"
            },
            {
              "lessThan": "4.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.20",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.20",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2.3",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: exc3000 - properly stop timer on shutdown\n\nWe need to stop the timer on driver unbind or probe failures, otherwise\nwe get UAF/Oops."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The free is triggered by a local operation \u2014 driver unbind via sysfs, module unload, or a bind-induced probe failure \u2014 and the arming side is a local I2C touch controller; there is no network-reachable path to this driver.\nAC:L - The 100ms timer window can be attacked repeatedly by looping bind/unbind while the controller emits error frames, and the probe-failure variant leaves the timer armed deterministically during the multi-second vendor-query retry loop, so the attacker drives both sides of the race.\nPR:L - An unprivileged local user can reach the vulnerable object through the world-readable fw_version/model/type sysfs attributes that drive I2C vendor requests and touch-frame handling; consistent with kernel CNA precedent, driver unbind/remove UAFs of this class are scored at low privilege rather than root.\nUI:N - No victim action is required \u2014 the attacker performs the unbind/rebind itself, and the probe-failure variant fires autonomously when the controller misbehaves.\nS:U - The use-after-free is contained within the kernel\u0027s own security authority with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The freed slab object is reallocatable, and the timer callback reads `data-\u003einput` and MT slot state out of freed memory, while `expire_timers()` reads the call target from it \u2014 giving a path to disclose arbitrary kernel memory.\nI:H - `fn = timer-\u003efunction` is loaded from the freed object and immediately called, and `detach_timer()` performs hlist pointer writes through it, yielding a controlled indirect call and write primitive suitable for privilege escalation.\nA:H - Even unexploited, the dangling timer dereferences freed memory 100ms after unbind or probe failure, producing the UAF/Oops reported in the commit message and crashing the kernel."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:15:22.206Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/526a177ac6353d65057eadb5d6edafc168f64484"
        },
        {
          "url": "https://git.kernel.org/stable/c/bee57c20fc0ca5ef9b9a53a0335eab2ac9e9cae1"
        },
        {
          "url": "https://git.kernel.org/stable/c/79c81d137d36f9635bbcbc3916c0cccb418a61dd"
        }
      ],
      "title": "Input: exc3000 - properly stop timer on shutdown",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53651",
    "datePublished": "2025-10-07T15:19:47.832Z",
    "dateReserved": "2025-10-07T15:16:59.660Z",
    "dateUpdated": "2026-08-05T09:15:22.206Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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