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rbd: Reset positive result codes to zero in object map update path

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: rbd: Reset positive result codes to zero in object map update path In a reply message to an RBD request, a positive result code indicates a data payload, which is not allowed for writes. While rbd_osd_req_callback() already resets a positive result code for writes to zero, rbd_object_map_callback() does not. This allows a corrupted reply to an object map update to trigger the rbd_assert(*result < 0) in __rbd_obj_handle_request(). This happens, because rbd_object_map_callback() calls rbd_obj_handle_request() -> __rbd_obj_handle_request() and passes this positive result code. From __rbd_obj_handle_request(), rbd_obj_advance_write() is called, which leaves the positive result code unchanged and returns true. Therefore, the if(done && *result) branch is executed in __rbd_obj_handle_request() and the assertion triggers. This patch fixes the issue by adjusting the logic in the rbd_object_map_callback() path. A positive result code for an object map update is now reset to zero (similar to rbd_osd_req_callback()), and the message is subsequently handled the same way as if the result code was zero from the beginning. Additionally, a WARN_ON_ONCE() is added for this case.

Announced Source revision 1
Original source ↗

CVE-2026-68131

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-2026-68131

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
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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": "22e8bd51bb0469d1a524130a057f894ff632376a",
        "lessThan": "cf1167292f606deaddac35ec384eba48f08a68d2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "22e8bd51bb0469d1a524130a057f894ff632376a",
        "lessThan": "da926959bf791441ba06a80571708c3d0d3cc08f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "22e8bd51bb0469d1a524130a057f894ff632376a",
        "lessThan": "6f33d9d539fb94e5a17589c2dfe271ff9bb64904",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "22e8bd51bb0469d1a524130a057f894ff632376a",
        "lessThan": "14995c4250f04b58bf6fc00e0e973a2e1b3cfb9b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "22e8bd51bb0469d1a524130a057f894ff632376a",
        "lessThan": "2419aa74081007dc4d14ff5640659052dfdfd69a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "22e8bd51bb0469d1a524130a057f894ff632376a",
        "lessThan": "34f2a2f32af570dfcc532ad70c080629ee1c32b0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "22e8bd51bb0469d1a524130a057f894ff632376a",
        "lessThan": "b1a61366933224b3ad80975c4d01ac2cc6931ecf",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "22e8bd51bb0469d1a524130a057f894ff632376a",
        "lessThan": "a6c4250b81bd30beae94e1b7a4b26fa1193ad2e4",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/block/rbd.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.3"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.3",
        "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": [
      "drivers/block/rbd.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-68131

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41127 · Revision 1
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