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CVE-2026-31442 dmaengine: idxd: Fix possible invalid memory access after FLR

🗓️ 22 Apr 2026 13:53:39Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 42 Views

Fixes invalid memory access in dma engine after function level reset by nulling deallocated scratch area when allocation fails.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/dma/idxd/init.c"
    ],
    "versions": [
      {
        "version": "98d187a989036096feaa2fef1ec3b2240ecdeacf",
        "lessThan": "504c0e6751001ac46917c73e703f2b1b92cfc026",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "98d187a989036096feaa2fef1ec3b2240ecdeacf",
        "lessThan": "867d0c801f21370d561420fa32f2ea1a7dc3a22d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "98d187a989036096feaa2fef1ec3b2240ecdeacf",
        "lessThan": "d6077df7b75d26e4edf98983836c05d00ebabd8d",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/dma/idxd/init.c"
    ],
    "versions": [
      {
        "version": "6.14",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.14",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.21",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.19.11",
        "lessThanOrEqual": "6.19.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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05 Aug 2026 12:22Current
CVSS 3.17.8
EPSS0.00127
42