Vulnerability-Lookup

CVE-2026-64504 (GCVE-0-2026-64504)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-07-25 08:51

Title

iio: accel: bmc150: clamp the device-reported FIFO frame count

Summary

In the Linux kernel, the following vulnerability has been resolved: iio: accel: bmc150: clamp the device-reported FIFO frame count __bmc150_accel_fifo_flush() copies the number of samples the device reports in its hardware FIFO into an on-stack buffer u16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3]; which is sized for at most BMC150_ACCEL_FIFO_LENGTH (32) samples. The frame count is read from the FIFO_STATUS register and only masked to its 7 valid bits: count = val & 0x7F; so it can be 0..127. The only other limit applied to it is the optional caller-supplied sample budget: if (samples && count > samples) count = samples; which does not constrain count on the flush-all path (samples == 0), and leaves it well above 32 whenever samples is larger. count samples are then transferred into buffer[]: bmc150_accel_fifo_transfer(data, (u8 *)buffer, count); bmc150_accel_fifo_transfer() reads count * 6 bytes through regmap, so a malfunctioning, malicious or counterfeit accelerometer (or an attacker tampering with the I2C/SPI bus) that reports up to 127 frames writes up to 762 bytes into the 192-byte buffer: a stack out-of-bounds write of up to 570 bytes that clobbers the stack canary, saved registers and the return address. Clamp count to BMC150_ACCEL_FIFO_LENGTH, the number of samples buffer[] is sized for, before the transfer, mirroring the watermark clamp already done in bmc150_accel_set_watermark(). A well-formed flush reports at most BMC150_ACCEL_FIFO_LENGTH frames, so legitimate devices are unaffected.

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/b5a9f521e0a49a026…
https://git.kernel.org/stable/c/2fe0531dd73eff1de…
https://git.kernel.org/stable/c/d0e6d924a5484e005…
https://git.kernel.org/stable/c/bfffc98f3de92e0f7…
https://git.kernel.org/stable/c/89f4a4ca0ac3a933c…
https://git.kernel.org/stable/c/3e766526827acd542…
https://git.kernel.org/stable/c/35a3cd8fd65e15029…
https://git.kernel.org/stable/c/ce0e1cae26096fe95…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 3bbec9773389112330954a6a64422eaa78d546c1 , < b5a9f521e0a49a0266200fd535b32a9668ecb33b (git) Affected: 3bbec9773389112330954a6a64422eaa78d546c1 , < 2fe0531dd73eff1de0f2584cb77716d645e548d5 (git) Affected: 3bbec9773389112330954a6a64422eaa78d546c1 , < d0e6d924a5484e005cae5aff6a0aa07a22f3c9ff (git) Affected: 3bbec9773389112330954a6a64422eaa78d546c1 , < bfffc98f3de92e0f76be7c7b72e63ac1776a6dbc (git) Affected: 3bbec9773389112330954a6a64422eaa78d546c1 , < 89f4a4ca0ac3a933c750569a771c079a290b0721 (git) Affected: 3bbec9773389112330954a6a64422eaa78d546c1 , < 3e766526827acd542bcd36c20c4d5f397e0f6521 (git) Affected: 3bbec9773389112330954a6a64422eaa78d546c1 , < 35a3cd8fd65e15029eb90f1e510045b1bb071175 (git) Affected: 3bbec9773389112330954a6a64422eaa78d546c1 , < ce0e1cae26096fe959a0da5563a6d6d5a801d5fb (git)
Linux	Linux	Affected: 4.1 Unaffected: 0 , < 4.1 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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              "versionType": "semver"
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              "status": "unaffected",
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              "version": "6.6.145",
              "versionType": "semver"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: accel: bmc150: clamp the device-reported FIFO frame count\n\n__bmc150_accel_fifo_flush() copies the number of samples the device\nreports in its hardware FIFO into an on-stack buffer\n\n\tu16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3];\n\nwhich is sized for at most BMC150_ACCEL_FIFO_LENGTH (32) samples. The\nframe count is read from the FIFO_STATUS register and only masked to its\n7 valid bits:\n\n\tcount = val \u0026 0x7F;\n\nso it can be 0..127. The only other limit applied to it is the optional\ncaller-supplied sample budget:\n\n\tif (samples \u0026\u0026 count \u003e samples)\n\t\tcount = samples;\n\nwhich does not constrain count on the flush-all path (samples == 0), and\nleaves it well above 32 whenever samples is larger. count samples are\nthen transferred into buffer[]:\n\n\tbmc150_accel_fifo_transfer(data, (u8 *)buffer, count);\n\nbmc150_accel_fifo_transfer() reads count * 6 bytes through regmap, so a\nmalfunctioning, malicious or counterfeit accelerometer (or an attacker\ntampering with the I2C/SPI bus) that reports up to 127 frames writes up\nto 762 bytes into the 192-byte buffer: a stack out-of-bounds write of up\nto 570 bytes that clobbers the stack canary, saved registers and the\nreturn address.\n\nClamp count to BMC150_ACCEL_FIFO_LENGTH, the number of samples buffer[]\nis sized for, before the transfer, mirroring the watermark clamp already\ndone in bmc150_accel_set_watermark(). A well-formed flush reports at most\nBMC150_ACCEL_FIFO_LENGTH frames, so legitimate devices are unaffected."
        }
      ],
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "datePublished": "2026-07-25T08:51:58.887Z",
    "dateReserved": "2026-07-19T15:36:31.793Z",
    "dateUpdated": "2026-07-25T08:51:58.887Z",
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The only other limit applied to it is the optional\\ncaller-supplied sample budget:\\n\\n\\tif (samples \u0026\u0026 count \u003e samples)\\n\\t\\tcount = samples;\\n\\nwhich does not constrain count on the flush-all path (samples == 0), and\\nleaves it well above 32 whenever samples is larger. count samples are\\nthen transferred into buffer[]:\\n\\n\\tbmc150_accel_fifo_transfer(data, (u8 *)buffer, count);\\n\\nbmc150_accel_fifo_transfer() reads count * 6 bytes through regmap, so a\\nmalfunctioning, malicious or counterfeit accelerometer (or an attacker\\ntampering with the I2C/SPI bus) that reports up to 127 frames writes up\\nto 762 bytes into the 192-byte buffer: a stack out-of-bounds write of up\\nto 570 bytes that clobbers the stack canary, saved registers and the\\nreturn address.\\n\\nClamp count to BMC150_ACCEL_FIFO_LENGTH, the number of samples buffer[]\\nis sized for, before the transfer, mirroring the watermark clamp already\\ndone in bmc150_accel_set_watermark(). A well-formed flush reports at most\\nBMC150_ACCEL_FIFO_LENGTH frames, so legitimate devices are unaffected.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/iio/accel/bmc150-accel-core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3bbec9773389112330954a6a64422eaa78d546c1\",\"lessThan\":\"b5a9f521e0a49a0266200fd535b32a9668ecb33b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3bbec9773389112330954a6a64422eaa78d546c1\",\"lessThan\":\"2fe0531dd73eff1de0f2584cb77716d645e548d5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3bbec9773389112330954a6a64422eaa78d546c1\",\"lessThan\":\"d0e6d924a5484e005cae5aff6a0aa07a22f3c9ff\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3bbec9773389112330954a6a64422eaa78d546c1\",\"lessThan\":\"bfffc98f3de92e0f76be7c7b72e63ac1776a6dbc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3bbec9773389112330954a6a64422eaa78d546c1\",\"lessThan\":\"89f4a4ca0ac3a933c750569a771c079a290b0721\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3bbec9773389112330954a6a64422eaa78d546c1\",\"lessThan\":\"3e766526827acd542bcd36c20c4d5f397e0f6521\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3bbec9773389112330954a6a64422eaa78d546c1\",\"lessThan\":\"35a3cd8fd65e15029eb90f1e510045b1bb071175\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3bbec9773389112330954a6a64422eaa78d546c1\",\"lessThan\":\"ce0e1cae26096fe959a0da5563a6d6d5a801d5fb\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/iio/accel/bmc150-accel-core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.1\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.1\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.96\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.39\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc3\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2fe0531dd73eff1de0f2584cb77716d645e548d5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/35a3cd8fd65e15029eb90f1e510045b1bb071175\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3e766526827acd542bcd36c20c4d5f397e0f6521\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/89f4a4ca0ac3a933c750569a771c079a290b0721\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b5a9f521e0a49a0266200fd535b32a9668ecb33b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bfffc98f3de92e0f76be7c7b72e63ac1776a6dbc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ce0e1cae26096fe959a0da5563a6d6d5a801d5fb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d0e6d924a5484e005cae5aff6a0aa07a22f3c9ff\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

GHSA-4J8X-6QX9-P4GC

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-25 12:31

Details

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

iio: accel: bmc150: clamp the device-reported FIFO frame count

__bmc150_accel_fifo_flush() copies the number of samples the device reports in its hardware FIFO into an on-stack buffer

u16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3];

which is sized for at most BMC150_ACCEL_FIFO_LENGTH (32) samples. The frame count is read from the FIFO_STATUS register and only masked to its 7 valid bits:

count = val & 0x7F;

so it can be 0..127. The only other limit applied to it is the optional caller-supplied sample budget:

if (samples && count > samples)
    count = samples;

which does not constrain count on the flush-all path (samples == 0), and leaves it well above 32 whenever samples is larger. count samples are then transferred into buffer[]:

bmc150_accel_fifo_transfer(data, (u8 *)buffer, count);

bmc150_accel_fifo_transfer() reads count * 6 bytes through regmap, so a malfunctioning, malicious or counterfeit accelerometer (or an attacker tampering with the I2C/SPI bus) that reports up to 127 frames writes up to 762 bytes into the 192-byte buffer: a stack out-of-bounds write of up to 570 bytes that clobbers the stack canary, saved registers and the return address.

Clamp count to BMC150_ACCEL_FIFO_LENGTH, the number of samples buffer[] is sized for, before the transfer, mirroring the watermark clamp already done in bmc150_accel_set_watermark(). A well-formed flush reports at most BMC150_ACCEL_FIFO_LENGTH frames, so legitimate devices are unaffected.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64504"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:36Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: accel: bmc150: clamp the device-reported FIFO frame count\n\n__bmc150_accel_fifo_flush() copies the number of samples the device\nreports in its hardware FIFO into an on-stack buffer\n\n\tu16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3];\n\nwhich is sized for at most BMC150_ACCEL_FIFO_LENGTH (32) samples. The\nframe count is read from the FIFO_STATUS register and only masked to its\n7 valid bits:\n\n\tcount = val \u0026 0x7F;\n\nso it can be 0..127. The only other limit applied to it is the optional\ncaller-supplied sample budget:\n\n\tif (samples \u0026\u0026 count \u003e samples)\n\t\tcount = samples;\n\nwhich does not constrain count on the flush-all path (samples == 0), and\nleaves it well above 32 whenever samples is larger. count samples are\nthen transferred into buffer[]:\n\n\tbmc150_accel_fifo_transfer(data, (u8 *)buffer, count);\n\nbmc150_accel_fifo_transfer() reads count * 6 bytes through regmap, so a\nmalfunctioning, malicious or counterfeit accelerometer (or an attacker\ntampering with the I2C/SPI bus) that reports up to 127 frames writes up\nto 762 bytes into the 192-byte buffer: a stack out-of-bounds write of up\nto 570 bytes that clobbers the stack canary, saved registers and the\nreturn address.\n\nClamp count to BMC150_ACCEL_FIFO_LENGTH, the number of samples buffer[]\nis sized for, before the transfer, mirroring the watermark clamp already\ndone in bmc150_accel_set_watermark(). A well-formed flush reports at most\nBMC150_ACCEL_FIFO_LENGTH frames, so legitimate devices are unaffected.",
  "id": "GHSA-4j8x-6qx9-p4gc",
  "modified": "2026-07-25T12:31:38Z",
  "published": "2026-07-25T12:31:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64504"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2fe0531dd73eff1de0f2584cb77716d645e548d5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/35a3cd8fd65e15029eb90f1e510045b1bb071175"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3e766526827acd542bcd36c20c4d5f397e0f6521"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/89f4a4ca0ac3a933c750569a771c079a290b0721"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b5a9f521e0a49a0266200fd535b32a9668ecb33b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bfffc98f3de92e0f76be7c7b72e63ac1776a6dbc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ce0e1cae26096fe959a0da5563a6d6d5a801d5fb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d0e6d924a5484e005cae5aff6a0aa07a22f3c9ff"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-64504 (GCVE-0-2026-64504)

GHSA-4J8X-6QX9-P4GC

Tags

Sightings

Nomenclature