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ALPINE-CVE-2026-23555

Type: advisorySource: OSV1 source record

Any guest issuing a Xenstore command accessing a node using the (illegal) node path "/local/domain/", will crash xenstored due to a clobbered error indicator in xenstored when verifying the node path. Note that the crash is forced via a failing assert() statement in xenstored. In case xenstored is being built with NDEBUG #defined, an unprivileged guest trying to access the node path "/local/domain/" will result in it no longer being serviced by xenstored, other guests (including dom0) will still be serviced, but xenstored will use up all cpu time it can get.

Announced Source revision 1
Original source ↗

ALPINE-CVE-2026-23555

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: osv:ALPINE-CVE-2026-23555

xen

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
4.18.5-r5

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

xen

Source reference: /affected/1/package/name

Affected versions
Not stated in this record
Fixed versions
4.19.4-r2

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

xen

Source reference: /affected/2/package/name

Affected versions
Not stated in this record
Fixed versions
4.20.2-r2

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

xen

Source reference: /affected/3/package/name

Affected versions
Not stated in this record
Fixed versions
4.20.2-r2

Source reference: /affected/3/ranges

Prerequisites
Not stated in this record

xen

Source reference: /affected/4/package/name

Affected versions
Not stated in this record
Fixed versions
4.21.0-r3

Source reference: /affected/4/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "4.18.0"
          },
          {
            "fixed": "4.18.5-r5"
          }
        ]
      }
    ],
    "package": {
      "name": "xen",
      "purl": "pkg:apk/alpine/xen?arch=source",
      "ecosystem": "Alpine:v3.20"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-23555.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "4.18.0"
          },
          {
            "fixed": "4.19.4-r2"
          }
        ]
      }
    ],
    "package": {
      "name": "xen",
      "purl": "pkg:apk/alpine/xen?arch=source",
      "ecosystem": "Alpine:v3.21"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-23555.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "4.18.0"
          },
          {
            "fixed": "4.20.2-r2"
          }
        ]
      }
    ],
    "package": {
      "name": "xen",
      "purl": "pkg:apk/alpine/xen?arch=source",
      "ecosystem": "Alpine:v3.22"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-23555.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "4.18.0"
          },
          {
            "fixed": "4.20.2-r2"
          }
        ]
      }
    ],
    "package": {
      "name": "xen",
      "purl": "pkg:apk/alpine/xen?arch=source",
      "ecosystem": "Alpine:v3.23"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-23555.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "4.18.0"
          },
          {
            "fixed": "4.21.0-r3"
          }
        ]
      }
    ],
    "package": {
      "name": "xen",
      "purl": "pkg:apk/alpine/xen?arch=source",
      "ecosystem": "Alpine:v3.24"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-23555.json"
    },
    "ecosystem_specific": {}
  }
]

Publisher severity

No explicit severity was provided.

Event
#54179 · Revision 1
Added to Heist Feed
Publisher date
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