CVE-2026-63908 (GCVE-0-2026-63908)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-19 14:55
VLAI
Title
Input: atmel_mxt_ts - fix boundary check in mxt_prepare_cfg_mem
Summary
In the Linux kernel, the following vulnerability has been resolved: Input: atmel_mxt_ts - fix boundary check in mxt_prepare_cfg_mem When a configuration file provides an object size that is larger than the driver's known mxt_obj_size(object), the driver intends to discard the extra bytes. The loop iterates using for (i = 0; i < size; i++). Inside the loop, the condition to skip processing extra bytes is: if (i > mxt_obj_size(object)) continue; Since i is a 0-based index, the valid indices for the object are 0 through mxt_obj_size(object) - 1. When i == mxt_obj_size(object), the condition evaluates to false, and the code processes the byte instead of discarding it. This causes the code to calculate byte_offset = reg + i - cfg->start_ofs and writes the byte there, overwriting exactly one byte of the adjacent instance or object. Update the boundary check to skip extra bytes correctly by using >=.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 50a77c658b80e7e3303e3bcec195b30e2b62d513 , < 862a1a32b5190241fce7a7d20229539a3926f31e (git)
Affected: 50a77c658b80e7e3303e3bcec195b30e2b62d513 , < 5c3681c3abc35cfac6b702251382312c60d96bc2 (git)
Affected: 50a77c658b80e7e3303e3bcec195b30e2b62d513 , < 1017e1c6c6c49cccbcda9bbcfa49e50b0b6dad39 (git)
Affected: 50a77c658b80e7e3303e3bcec195b30e2b62d513 , < e9b62996ba537774f68fecfd7eecb5aec1713952 (git)
Affected: 50a77c658b80e7e3303e3bcec195b30e2b62d513 , < ae92e334544263a02d9f99e18385e718c44392c9 (git)
Affected: 50a77c658b80e7e3303e3bcec195b30e2b62d513 , < 7f95f4792c0dc767fcb8e405391e779ab419d55a (git)
Affected: 50a77c658b80e7e3303e3bcec195b30e2b62d513 , < 6c6b989b4ebf22b086fdfcac2163b5cb55e34d8f (git)
Affected: 50a77c658b80e7e3303e3bcec195b30e2b62d513 , < baa0210fb6a9dc3882509a9411b6d284d88fe30e (git)
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Linux Linux Affected: 3.17
Unaffected: 0 , < 3.17 (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: 6.12.93 , ≤ 6.12.* (semver)
Unaffected: 6.18.35 , ≤ 6.18.* (semver)
Unaffected: 7.0.12 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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        }
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      "providerMetadata": {
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "datePublished": "2026-07-19T14:55:14.349Z",
    "dateReserved": "2026-07-19T07:54:57.020Z",
    "dateUpdated": "2026-07-19T14:55:14.349Z",
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Inside the loop, the\\ncondition to skip processing extra bytes is:\\n\\n    if (i \u003e mxt_obj_size(object))\\n        continue;\\n\\nSince i is a 0-based index, the valid indices for the object are 0 through\\nmxt_obj_size(object) - 1.\\n\\nWhen i == mxt_obj_size(object), the condition evaluates to false, and the\\ncode processes the byte instead of discarding it.\\n\\nThis causes the code to calculate byte_offset = reg + i - cfg-\u003estart_ofs\\nand writes the byte there, overwriting exactly one byte of the adjacent\\ninstance or object.\\n\\nUpdate the boundary check to skip extra bytes correctly by using \u003e=.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/input/touchscreen/atmel_mxt_ts.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"50a77c658b80e7e3303e3bcec195b30e2b62d513\",\"lessThan\":\"862a1a32b5190241fce7a7d20229539a3926f31e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"50a77c658b80e7e3303e3bcec195b30e2b62d513\",\"lessThan\":\"5c3681c3abc35cfac6b702251382312c60d96bc2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"50a77c658b80e7e3303e3bcec195b30e2b62d513\",\"lessThan\":\"1017e1c6c6c49cccbcda9bbcfa49e50b0b6dad39\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"50a77c658b80e7e3303e3bcec195b30e2b62d513\",\"lessThan\":\"e9b62996ba537774f68fecfd7eecb5aec1713952\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"50a77c658b80e7e3303e3bcec195b30e2b62d513\",\"lessThan\":\"ae92e334544263a02d9f99e18385e718c44392c9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"50a77c658b80e7e3303e3bcec195b30e2b62d513\",\"lessThan\":\"7f95f4792c0dc767fcb8e405391e779ab419d55a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"50a77c658b80e7e3303e3bcec195b30e2b62d513\",\"lessThan\":\"6c6b989b4ebf22b086fdfcac2163b5cb55e34d8f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"50a77c658b80e7e3303e3bcec195b30e2b62d513\",\"lessThan\":\"baa0210fb6a9dc3882509a9411b6d284d88fe30e\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/input/touchscreen/atmel_mxt_ts.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.17\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.17\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.259\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.210\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.176\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.143\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.93\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.35\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.12\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1017e1c6c6c49cccbcda9bbcfa49e50b0b6dad39\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5c3681c3abc35cfac6b702251382312c60d96bc2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6c6b989b4ebf22b086fdfcac2163b5cb55e34d8f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7f95f4792c0dc767fcb8e405391e779ab419d55a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/862a1a32b5190241fce7a7d20229539a3926f31e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ae92e334544263a02d9f99e18385e718c44392c9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/baa0210fb6a9dc3882509a9411b6d284d88fe30e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e9b62996ba537774f68fecfd7eecb5aec1713952\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}



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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.

Sightings

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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.