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libceph: bound get_version reply decode to front len

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: libceph: bound get_version reply decode to front len handle_get_version_reply() uses msg->front_alloc_len as the decode boundary for MON_GET_VERSION_REPLY. That is the size of the reused reply buffer, not the number of bytes actually received. A truncated reply can therefore pass ceph_decode_need() and decode the second u64 from stale tail bytes left in the buffer by an earlier message, causing an uninitialized memory read. Use msg->front.iov_len as the receive-side decode boundary, matching other libceph reply handlers and limiting decoding to the bytes that were actually read from the wire.

Announced Source revision 1
Original source ↗

CVE-2026-68433

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-2026-68433

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": "513a8243d67f8e8d27f2883bd2f18bc87c7ca376",
        "lessThan": "1307028f082756bf453e1889aee9983d30643a4b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "513a8243d67f8e8d27f2883bd2f18bc87c7ca376",
        "lessThan": "f6cbf6878f3a1503c872ba8f1e69a58ee68d8b2e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "513a8243d67f8e8d27f2883bd2f18bc87c7ca376",
        "lessThan": "72a35070fcefa229b1b031aa7482ad3788e18f07",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "513a8243d67f8e8d27f2883bd2f18bc87c7ca376",
        "lessThan": "340e0386aa39da181015bee38f309018c335ce16",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "513a8243d67f8e8d27f2883bd2f18bc87c7ca376",
        "lessThan": "d60de8253c85a02d0e6194b0735e7a562981a04c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "513a8243d67f8e8d27f2883bd2f18bc87c7ca376",
        "lessThan": "4e7ebfaa0d14cf50e44041bfde38070d6dbc019f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "513a8243d67f8e8d27f2883bd2f18bc87c7ca376",
        "lessThan": "0d934c934ec746d53fc7e4f53239792647bbae63",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "513a8243d67f8e8d27f2883bd2f18bc87c7ca376",
        "lessThan": "d3c32939fa0e3ee9b883b9a0fd1972c5c444e3d0",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/ceph/mon_client.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/ceph/mon_client.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-68433

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41725 · Revision 1
Added to Heist Feed
Publisher date
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