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firmware: arm_ffa: Fix out-of-bound writes in ffa_setup_and_transmit()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Fix out-of-bound writes in ffa_setup_and_transmit() Sashiko (locally) reports multiple out-of-bound issues in ffa_setup_and_transmit: 1) Writing ep_mem_access->reserved can write out of bounds for FFA versions < 1.2 as ffa_emad_size_get() returns 16 bytes in that case while reserved has an offset of 24. Instead of zeroing fields, memset the struct to zero first based on the FFA version. 2) Make sure there is enough size to write constituents. While at it, convert the only sizeof() in the driver that uses a type instead of variable.

Announced Source revision 1
Original source ↗

CVE-2026-68401

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-2026-68401

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": "111a833dc5cbef3d05b2a796a7e23cb7f6ff2192",
        "lessThan": "d312a71b19bb83803c8d1372bc042bd36db657f7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "111a833dc5cbef3d05b2a796a7e23cb7f6ff2192",
        "lessThan": "00bef9d0f9e787f56ff4699d3b577983ff8b7f24",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "111a833dc5cbef3d05b2a796a7e23cb7f6ff2192",
        "lessThan": "cf5708c9d78c98214c62b1e5d049cd527a543b8e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "111a833dc5cbef3d05b2a796a7e23cb7f6ff2192",
        "lessThan": "27abdaf0c5c89b06694e4c3d8318e8d6a60c1d1b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "111a833dc5cbef3d05b2a796a7e23cb7f6ff2192",
        "lessThan": "3383ffb7ef937317361713ffcc21921a7848511a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "28ebfb74fbf513e0c7cd2674d8c2400ee0220d18",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "22157f74458106c5900dbd938eb44623c22d97a0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b77ec23b6df41c48e88735230e11caec56163630",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5.15.114",
        "lessThan": "5.16",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.1.31",
        "lessThan": "6.2",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.3.5",
        "lessThan": "6.4",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "drivers/firmware/arm_ffa/driver.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.4"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.4",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.114",
        "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": [
      "drivers/firmware/arm_ffa/driver.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-68401

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#46471 · Revision 1
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Publisher date
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