GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-89457 (GCVE-0-2026-89457)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-09-14 11:59
VLAI
Title
s390/dasd: Guard sysfs discipline callbacks against unallocated private data
Summary
In the Linux kernel, the following vulnerability has been resolved: s390/dasd: Guard sysfs discipline callbacks against unallocated private data Several sysfs show/store handlers call a discipline callback that dereferences device->private, either directly or through the DASD_DEFINE_ATTR() macro. During dasd_generic_set_online() the discipline is assigned before check_device() allocates device->private, so an unprivileged read of one of these world-readable attributes in that window dereferences a NULL pointer and panics. Guard the dereference inside each callback that actually touches device->private.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c729696bcf8b23450043dd9c9972c15e53419ae4 , < 644b666c202cce12ccfcf9ded67089b18f4f7659 (git)
Affected: c729696bcf8b23450043dd9c9972c15e53419ae4 , < 4a042d8e5f34282577ece50515cea8bb1246914d (git)
Affected: c729696bcf8b23450043dd9c9972c15e53419ae4 , < bd8b4572528f9604a13bf3c7c2a167f5cf222f72 (git)
Affected: c729696bcf8b23450043dd9c9972c15e53419ae4 , < 57db27ccc162afe0726cffec0ae62e410ed2d0e9 (git)
Affected: c729696bcf8b23450043dd9c9972c15e53419ae4 , < 536407b272402af679155910d7fdeeb4834eefb9 (git)
Affected: c729696bcf8b23450043dd9c9972c15e53419ae4 , < 6452c13646af7c13d7f6668b6690cfb2427e7f7b (git)
Affected: c729696bcf8b23450043dd9c9972c15e53419ae4 , < 449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5 (git)
Affected: c729696bcf8b23450043dd9c9972c15e53419ae4 , < 2a1780f9fc2493bd34c418a0be6fc58943afcecf (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.3
Unaffected: 0 , < 5.3 (semver)
Unaffected: 5.10.270 , ≤ 5.10.* (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.109 , ≤ 6.12.* (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/s390/block/dasd_eckd.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "644b666c202cce12ccfcf9ded67089b18f4f7659",
              "status": "affected",
              "version": "c729696bcf8b23450043dd9c9972c15e53419ae4",
              "versionType": "git"
            },
            {
              "lessThan": "4a042d8e5f34282577ece50515cea8bb1246914d",
              "status": "affected",
              "version": "c729696bcf8b23450043dd9c9972c15e53419ae4",
              "versionType": "git"
            },
            {
              "lessThan": "bd8b4572528f9604a13bf3c7c2a167f5cf222f72",
              "status": "affected",
              "version": "c729696bcf8b23450043dd9c9972c15e53419ae4",
              "versionType": "git"
            },
            {
              "lessThan": "57db27ccc162afe0726cffec0ae62e410ed2d0e9",
              "status": "affected",
              "version": "c729696bcf8b23450043dd9c9972c15e53419ae4",
              "versionType": "git"
            },
            {
              "lessThan": "536407b272402af679155910d7fdeeb4834eefb9",
              "status": "affected",
              "version": "c729696bcf8b23450043dd9c9972c15e53419ae4",
              "versionType": "git"
            },
            {
              "lessThan": "6452c13646af7c13d7f6668b6690cfb2427e7f7b",
              "status": "affected",
              "version": "c729696bcf8b23450043dd9c9972c15e53419ae4",
              "versionType": "git"
            },
            {
              "lessThan": "449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5",
              "status": "affected",
              "version": "c729696bcf8b23450043dd9c9972c15e53419ae4",
              "versionType": "git"
            },
            {
              "lessThan": "2a1780f9fc2493bd34c418a0be6fc58943afcecf",
              "status": "affected",
              "version": "c729696bcf8b23450043dd9c9972c15e53419ae4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/s390/block/dasd_eckd.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.3"
            },
            {
              "lessThan": "5.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.270",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.109",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/dasd: Guard sysfs discipline callbacks against unallocated private data\n\nSeveral sysfs show/store handlers call a discipline callback that\ndereferences device-\u003eprivate, either directly or through the\nDASD_DEFINE_ATTR() macro. During dasd_generic_set_online() the discipline\nis assigned before check_device() allocates device-\u003eprivate, so an\nunprivileged read of one of these world-readable attributes in that window\ndereferences a NULL pointer and panics.\n\nGuard the dereference inside each callback that actually touches\ndevice-\u003eprivate."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T11:59:57.812Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/644b666c202cce12ccfcf9ded67089b18f4f7659"
        },
        {
          "url": "https://git.kernel.org/stable/c/4a042d8e5f34282577ece50515cea8bb1246914d"
        },
        {
          "url": "https://git.kernel.org/stable/c/bd8b4572528f9604a13bf3c7c2a167f5cf222f72"
        },
        {
          "url": "https://git.kernel.org/stable/c/57db27ccc162afe0726cffec0ae62e410ed2d0e9"
        },
        {
          "url": "https://git.kernel.org/stable/c/536407b272402af679155910d7fdeeb4834eefb9"
        },
        {
          "url": "https://git.kernel.org/stable/c/6452c13646af7c13d7f6668b6690cfb2427e7f7b"
        },
        {
          "url": "https://git.kernel.org/stable/c/449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5"
        },
        {
          "url": "https://git.kernel.org/stable/c/2a1780f9fc2493bd34c418a0be6fc58943afcecf"
        }
      ],
      "title": "s390/dasd: Guard sysfs discipline callbacks against unallocated private data",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89457",
    "datePublished": "2026-09-11T19:43:20.701Z",
    "dateReserved": "2026-09-11T19:38:34.707Z",
    "dateUpdated": "2026-09-14T11:59:57.812Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-89457",
      "date": "2026-09-16",
      "epss": "0.00176",
      "percentile": "0.07428"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-89457\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-11T20:19:26.527\",\"lastModified\":\"2026-09-14T13:19:02.093\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ns390/dasd: Guard sysfs discipline callbacks against unallocated private data\\n\\nSeveral sysfs show/store handlers call a discipline callback that\\ndereferences device-\u003eprivate, either directly or through the\\nDASD_DEFINE_ATTR() macro. During dasd_generic_set_online() the discipline\\nis assigned before check_device() allocates device-\u003eprivate, so an\\nunprivileged read of one of these world-readable attributes in that window\\ndereferences a NULL pointer and panics.\\n\\nGuard the dereference inside each callback that actually touches\\ndevice-\u003eprivate.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/s390/block/dasd_eckd.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"c729696bcf8b23450043dd9c9972c15e53419ae4\",\"lessThan\":\"644b666c202cce12ccfcf9ded67089b18f4f7659\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c729696bcf8b23450043dd9c9972c15e53419ae4\",\"lessThan\":\"4a042d8e5f34282577ece50515cea8bb1246914d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c729696bcf8b23450043dd9c9972c15e53419ae4\",\"lessThan\":\"bd8b4572528f9604a13bf3c7c2a167f5cf222f72\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c729696bcf8b23450043dd9c9972c15e53419ae4\",\"lessThan\":\"57db27ccc162afe0726cffec0ae62e410ed2d0e9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c729696bcf8b23450043dd9c9972c15e53419ae4\",\"lessThan\":\"536407b272402af679155910d7fdeeb4834eefb9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c729696bcf8b23450043dd9c9972c15e53419ae4\",\"lessThan\":\"6452c13646af7c13d7f6668b6690cfb2427e7f7b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c729696bcf8b23450043dd9c9972c15e53419ae4\",\"lessThan\":\"449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c729696bcf8b23450043dd9c9972c15e53419ae4\",\"lessThan\":\"2a1780f9fc2493bd34c418a0be6fc58943afcecf\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/s390/block/dasd_eckd.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.3\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.3\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.270\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.221\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.188\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.157\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.109\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.50\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.4\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2a1780f9fc2493bd34c418a0be6fc58943afcecf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4a042d8e5f34282577ece50515cea8bb1246914d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/536407b272402af679155910d7fdeeb4834eefb9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/57db27ccc162afe0726cffec0ae62e410ed2d0e9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/644b666c202cce12ccfcf9ded67089b18f4f7659\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6452c13646af7c13d7f6668b6690cfb2427e7f7b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bd8b4572528f9604a13bf3c7c2a167f5cf222f72\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-14T18:25:35+00:00",
      "cve": "CVE-2026-89457",
      "id": "CVE-2026-89457",
      "initial_release_date": "2026-09-11T00:00:00+00:00",
      "product_status:known_affected": "185",
      "product_status:known_not_affected": "91",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: s390/dasd: Guard sysfs discipline callbacks against unallocated private data",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89457.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-15T00:59:09Z",
      "cve": "CVE-2026-89457",
      "id": "CVE-2026-89457",
      "initial_release_date": "2026-09-12T16:28:10Z",
      "product_status:known_affected": "260",
      "product_status:known_not_affected": "93",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-89457",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-89457.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.