Skip to content
Heist/ feed
High

mac802154: llsec: reject frames shorter than the authentication tag

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: mac802154: llsec: reject frames shorter than the authentication tag llsec_do_decrypt_auth() computes the associated-data length for the AEAD request as assoclen += datalen - authlen; where datalen is the number of bytes after the MAC header and authlen (4, 8 or 16) is the length of the authentication tag. Nothing verifies that the frame actually carries at least authlen payload bytes. A secured frame whose payload is shorter than the tag makes datalen - authlen negative; assoclen is then passed to aead_request_set_ad() as an unsigned value close to 4 GiB, so crypto_aead_decrypt() walks far off the end of the scatterlist that only spans the real frame. The frame is fully attacker-controlled and reaches this path from any IEEE 802.15.4 peer in radio range. Reject frames whose payload is shorter than the authentication tag before the subtraction. Dynamically reproduced on a KASAN kernel as a general-protection-fault in the AEAD scatterwalk, and the fix confirmed.

Announced Source revision 1
Original source ↗

CVE-2026-68125

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-2026-68125

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": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af",
        "lessThan": "f27ce82eb04960465df71634b196a48a4ecafd50",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af",
        "lessThan": "2d6b42a61373144298070668fddf06efe79cf2ff",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af",
        "lessThan": "ec7e62d77193131227df49d654d118fdf5a59892",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af",
        "lessThan": "5bbf0cd9b6a7076af86c75e87e180099be2e11ae",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af",
        "lessThan": "de80808f37d99c6dc67bb6f97eea00c8f57a8821",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af",
        "lessThan": "f20dedce0429b293d4bad604e0d3f65d8ac96c83",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af",
        "lessThan": "e09e0301d616c1ef38a5e64e8e4326fd39df13cc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4c14a2fb5d143e4ed94143be2b8c1961b47df9af",
        "lessThan": "fd3a3f28ed60c6af4b2a39933b151d6b27842c3b",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/mac802154/llsec.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.16"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.16",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.265",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.216",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.183",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.148",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.101",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.42",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/mac802154/llsec.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-68125

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41124 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement