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Input: rmi_smbus - fix out-of-bounds read in rmi_smb_write_block()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: Input: rmi_smbus - fix out-of-bounds read in rmi_smb_write_block() When chunking writes into SMBus blocks in rmi_smb_write_block(), the loop calculates block_len using the original total length (len) instead of the remaining length (cur_len). If len is greater than 32 bytes (SMB_MAX_COUNT), block_len remains 32 for every iteration, even on the final partial chunk where fewer than 32 bytes remain. This causes smb_block_write() to read 32 bytes from the advanced data buffer pointer, reading past the end of the input buffer. Fix this by calculating block_len using cur_len and advancing the buffer and address pointers by block_len.

Announced Source revision 1
Original source ↗

CVE-2026-98204

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98204

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "82264d0cf7aef2247563c031ff2ab96579d5d0cc",
        "lessThan": "d01337c0892d1509500c727edf81380777c2dd0f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82264d0cf7aef2247563c031ff2ab96579d5d0cc",
        "lessThan": "7c800af1c6030a5f27d46ce7d6d5d75f9c1efaf8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82264d0cf7aef2247563c031ff2ab96579d5d0cc",
        "lessThan": "29fbcf5834f0a7f74bfd017c07da2411b35a4e2a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82264d0cf7aef2247563c031ff2ab96579d5d0cc",
        "lessThan": "50dd585bee7669eb165e5defcc35d17f3822cfbb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82264d0cf7aef2247563c031ff2ab96579d5d0cc",
        "lessThan": "e022538e13dd1c82af5ec25ac28f12ca0ab26160",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82264d0cf7aef2247563c031ff2ab96579d5d0cc",
        "lessThan": "dc05ec97b8299e48e31367a9bc412c7e9c0e2b42",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82264d0cf7aef2247563c031ff2ab96579d5d0cc",
        "lessThan": "9f0ce5e162eed8b68345abe839c59768bc60f99a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82264d0cf7aef2247563c031ff2ab96579d5d0cc",
        "lessThan": "51cfe54f815ae175c7d1126b983d4d7c89715004",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/input/rmi4/rmi_smbus.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.10"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.10",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.271",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.112",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.54",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.8",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/input/rmi4/rmi_smbus.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98204

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#38283 · Revision 1
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Publisher date
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