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CVE-2026-74356 vhost: fix vhost_get_avail_idx for a non empty ring

🗓️ 15 Aug 2026 05:58:41Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 4 Views

vhost_get_avail_idx in Linux kernel vhost returns wrong value, causing host livelock via premature notification disable.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-74356
15 Aug 202605:58
attackerkb
cve
CVE
CVE-2026-74356
15 Aug 202600:00
cve
debiancve
Debian CVE
CVE-2026-74356
15 Aug 202600:00
debiancve
euvd
EUVD
EUVD-2026-59503
15 Aug 202605:58
euvd
nvd
NVD
CVE-2026-74356
15 Aug 202606:22
nvd
ptsecurity
Positive Technologies
PT-2026-72792
15 Aug 202600:00
ptsecurity
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/vhost/vhost.c"
    ],
    "versions": [
      {
        "version": "d3bb267bbdcba199568f1325743d9d501dea0560",
        "lessThan": "e115471008111f894c6528d9ab2ce7d0ce306f35",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d3bb267bbdcba199568f1325743d9d501dea0560",
        "lessThan": "7f229d27bf27c7e589eca690d8612763a7a4801f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d3bb267bbdcba199568f1325743d9d501dea0560",
        "lessThan": "a9326b652bc7acd748d7a1143573845c7924d847",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d3bb267bbdcba199568f1325743d9d501dea0560",
        "lessThan": "09861858a68342f851f71c669ac0f69865c32151",
        "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/vhost/vhost.c"
    ],
    "versions": [
      {
        "version": "5.18",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.18",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.97",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.40",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.5",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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