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ipmi: ipmb: validate write message length

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: ipmi: ipmb: validate write message length ipmb_write() read message fields before validating the length byte. A zero or short write can read uninitialized stack bytes. A length smaller than the SMBus header underflows the block write length. Require a non-empty buffer and the minimum IPMB request length. Also require the length byte plus payload before parsing the message.

Announced Source revision 1
Original source ↗

CVE-2026-81007

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-2026-81007

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": "51bd6f291583684f495ea498984dfc22049d7fd2",
        "lessThan": "8990c7f6bfc1e7689b7012a7d4d0efb9f07a9c89",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "51bd6f291583684f495ea498984dfc22049d7fd2",
        "lessThan": "94f8d20153e348c79bc14dc25f873470518892da",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "51bd6f291583684f495ea498984dfc22049d7fd2",
        "lessThan": "e527cd4e80066e1ed070fdc7c705bde340cdcc62",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "51bd6f291583684f495ea498984dfc22049d7fd2",
        "lessThan": "7d66d54b974cff0a959e188af844d2d110422767",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "51bd6f291583684f495ea498984dfc22049d7fd2",
        "lessThan": "60939bcda6f3f104ef456fdbf3cc5733c0720fb1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "51bd6f291583684f495ea498984dfc22049d7fd2",
        "lessThan": "5719431ca2b5fa26560bb38f6202f8b97fa3bbb0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "51bd6f291583684f495ea498984dfc22049d7fd2",
        "lessThan": "a84c6e3d188f2c6e674910929eb790634299d6d5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "51bd6f291583684f495ea498984dfc22049d7fd2",
        "lessThan": "53637506884dbd5c91a89b1a3547d99d80f8ed2c",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/char/ipmi/ipmb_dev_int.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.3"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.3",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.109",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.50",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/char/ipmi/ipmb_dev_int.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-81007

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#34963 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement