CVE-2026-80709 (GCVE-0-2026-80709)
Vulnerability from cvelistv5
Published
2026-08-28 06:53
Modified
2026-10-16 19:26
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs There is a wrong upper limit check for the domain value when an EP11 CPRB is processed for sending to a crypto card. This check is only active on custom device nodes but may lead to access heap memory behind perms->adm when an administrative CPRB is sent. Add correct limit (AP_DOMAINS = 256) checking to fix this.
References
Impacted products
Vendor Product Version
Linux Linux Version: cfd68b33094e1a92249850ff3c3c92ae9112a541
Version: cfd68b33094e1a92249850ff3c3c92ae9112a541
Version: cfd68b33094e1a92249850ff3c3c92ae9112a541
Version: cfd68b33094e1a92249850ff3c3c92ae9112a541
Version: cfd68b33094e1a92249850ff3c3c92ae9112a541
Version: cfd68b33094e1a92249850ff3c3c92ae9112a541
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-80709",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-16T19:20:33.288089Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-16T19:26:34.515Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/s390/crypto/zcrypt_api.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4589f742718d0256ea6dd1f5a78be6e689bdb8aa",
              "status": "affected",
              "version": "cfd68b33094e1a92249850ff3c3c92ae9112a541",
              "versionType": "git"
            },
            {
              "lessThan": "b505dcc8307d64468b463dfad45a03bf865c637e",
              "status": "affected",
              "version": "cfd68b33094e1a92249850ff3c3c92ae9112a541",
              "versionType": "git"
            },
            {
              "lessThan": "13e53d6ae1c3b2ff1be75b9ef09be26f4ec3ce15",
              "status": "affected",
              "version": "cfd68b33094e1a92249850ff3c3c92ae9112a541",
              "versionType": "git"
            },
            {
              "lessThan": "672b12940e3f1336dfed5287412a71500adf2a76",
              "status": "affected",
              "version": "cfd68b33094e1a92249850ff3c3c92ae9112a541",
              "versionType": "git"
            },
            {
              "lessThan": "1223477ca88e2396eca440919d0ca8754df79bd5",
              "status": "affected",
              "version": "cfd68b33094e1a92249850ff3c3c92ae9112a541",
              "versionType": "git"
            },
            {
              "lessThan": "983279d7f86ade73db86f886e09172dd567031b5",
              "status": "affected",
              "version": "cfd68b33094e1a92249850ff3c3c92ae9112a541",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/s390/crypto/zcrypt_api.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.151",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.151",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.103",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.44",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.8",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: Fix wrong domain value verification with EP11 CPRBs\n\nThere is a wrong upper limit check for the domain value when an EP11\nCPRB is processed for sending to a crypto card. This check is only\nactive on custom device nodes but may lead to access heap memory\nbehind perms-\u003eadm when an administrative CPRB is sent.\nAdd correct limit (AP_DOMAINS = 256) checking to fix this."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Reached only via ZSENDEP11CPRB ioctl on an s390 zcrypt custom zcdn character device (zcrypt_unlocked_ioctl -\u003e zsendep11cprb_ioctl -\u003e _zcrypt_send_ep11_cprb); no network, radio, or physical-bus entry path exists.\nAC:L - A local attacker with a permitted zcdn fd fully controls ep11_urb/CPRB target_id and the admin flag; domain values 256-65534 reliably trigger the flawed test_bit_inv() past perms-\u003eadm without races or conditions outside attacker control.\nPR:L - Exploitation requires local access to a custom zcdn node with ZSENDEP11CPRB enabled in ioctlmask; IBM Z/LinuxONE deployments routinely delegate such restricted crypto device access to non-root service accounts, not init-namespace root alone.\nUI:N - The attacker triggers the flaw by issuing ZSENDEP11CPRB with a crafted administrative EP11 CPRB from their own process; no separate victim action such as mounting a filesystem or opening a file is required.\nS:U - Impact is kernel heap out-of-bounds read and bypass of per-device admin-domain filtering within the host kernel address space; it does not cross a VM, IOMMU, or other changed security-authority boundary.\nC:H - Using domain 256-65534 with an admin CPRB makes test_bit_inv() index beyond the 256-bit perms-\u003eadm bitmap, reading adjacent kmalloc heap memory behind the zcdn_device allocation.\nI:H - If the out-of-bounds read observes a set bit, the admask admin-domain check passes and unauthorized EP11 administrative CPRBs can reach crypto control domains outside the device\u0027s intended permissions.\nA:H - Large crafted domain values make test_bit_inv() read far beyond the zcdn_device kmalloc object, which can access unmapped memory and provoke a kernel oops or panic during the ioctl path."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-29T06:22:25.717Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4589f742718d0256ea6dd1f5a78be6e689bdb8aa"
        },
        {
          "url": "https://git.kernel.org/stable/c/b505dcc8307d64468b463dfad45a03bf865c637e"
        },
        {
          "url": "https://git.kernel.org/stable/c/13e53d6ae1c3b2ff1be75b9ef09be26f4ec3ce15"
        },
        {
          "url": "https://git.kernel.org/stable/c/672b12940e3f1336dfed5287412a71500adf2a76"
        },
        {
          "url": "https://git.kernel.org/stable/c/1223477ca88e2396eca440919d0ca8754df79bd5"
        },
        {
          "url": "https://git.kernel.org/stable/c/983279d7f86ade73db86f886e09172dd567031b5"
        }
      ],
      "title": "s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80709",
    "datePublished": "2026-08-28T06:53:09.439Z",
    "dateReserved": "2026-08-26T14:34:25.787Z",
    "dateUpdated": "2026-10-16T19:26:34.515Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-80709\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-16T19:20:33.288089Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-10-16T19:20:34.292Z\"}}], \"cna\": {\"title\": \"s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:L - Reached only via ZSENDEP11CPRB ioctl on an s390 zcrypt custom zcdn character device (zcrypt_unlocked_ioctl -\u003e zsendep11cprb_ioctl -\u003e _zcrypt_send_ep11_cprb); no network, radio, or physical-bus entry path exists.\\nAC:L - A local attacker with a permitted zcdn fd fully controls ep11_urb/CPRB target_id and the admin flag; domain values 256-65534 reliably trigger the flawed test_bit_inv() past perms-\u003eadm without races or conditions outside attacker control.\\nPR:L - Exploitation requires local access to a custom zcdn node with ZSENDEP11CPRB enabled in ioctlmask; IBM Z/LinuxONE deployments routinely delegate such restricted crypto device access to non-root service accounts, not init-namespace root alone.\\nUI:N - The attacker triggers the flaw by issuing ZSENDEP11CPRB with a crafted administrative EP11 CPRB from their own process; no separate victim action such as mounting a filesystem or opening a file is required.\\nS:U - Impact is kernel heap out-of-bounds read and bypass of per-device admin-domain filtering within the host kernel address space; it does not cross a VM, IOMMU, or other changed security-authority boundary.\\nC:H - Using domain 256-65534 with an admin CPRB makes test_bit_inv() index beyond the 256-bit perms-\u003eadm bitmap, reading adjacent kmalloc heap memory behind the zcdn_device allocation.\\nI:H - If the out-of-bounds read observes a set bit, the admask admin-domain check passes and unauthorized EP11 administrative CPRBs can reach crypto control domains outside the device\u0027s intended permissions.\\nA:H - Large crafted domain values make test_bit_inv() read far beyond the zcdn_device kmalloc object, which can access unmapped memory and provoke a kernel oops or panic during the ioctl path.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"cfd68b33094e1a92249850ff3c3c92ae9112a541\", \"lessThan\": \"4589f742718d0256ea6dd1f5a78be6e689bdb8aa\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"cfd68b33094e1a92249850ff3c3c92ae9112a541\", \"lessThan\": \"b505dcc8307d64468b463dfad45a03bf865c637e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"cfd68b33094e1a92249850ff3c3c92ae9112a541\", \"lessThan\": \"13e53d6ae1c3b2ff1be75b9ef09be26f4ec3ce15\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"cfd68b33094e1a92249850ff3c3c92ae9112a541\", \"lessThan\": \"672b12940e3f1336dfed5287412a71500adf2a76\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"cfd68b33094e1a92249850ff3c3c92ae9112a541\", \"lessThan\": \"1223477ca88e2396eca440919d0ca8754df79bd5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"cfd68b33094e1a92249850ff3c3c92ae9112a541\", \"lessThan\": \"983279d7f86ade73db86f886e09172dd567031b5\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/s390/crypto/zcrypt_api.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.18\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.18\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.183\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.151\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.103\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.44\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"7.1.8\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.1.*\"}, {\"status\": \"unaffected\", \"version\": \"7.2\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/s390/crypto/zcrypt_api.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/4589f742718d0256ea6dd1f5a78be6e689bdb8aa\"}, {\"url\": \"https://git.kernel.org/stable/c/b505dcc8307d64468b463dfad45a03bf865c637e\"}, {\"url\": \"https://git.kernel.org/stable/c/13e53d6ae1c3b2ff1be75b9ef09be26f4ec3ce15\"}, {\"url\": \"https://git.kernel.org/stable/c/672b12940e3f1336dfed5287412a71500adf2a76\"}, {\"url\": \"https://git.kernel.org/stable/c/1223477ca88e2396eca440919d0ca8754df79bd5\"}, {\"url\": \"https://git.kernel.org/stable/c/983279d7f86ade73db86f886e09172dd567031b5\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ns390/zcrypt: Fix wrong domain value verification with EP11 CPRBs\\n\\nThere is a wrong upper limit check for the domain value when an EP11\\nCPRB is processed for sending to a crypto card. This check is only\\nactive on custom device nodes but may lead to access heap memory\\nbehind perms-\u003eadm when an administrative CPRB is sent.\\nAdd correct limit (AP_DOMAINS = 256) checking to fix this.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.183\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.151\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.103\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.44\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.1.8\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.2\", \"versionStartIncluding\": \"5.18\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-29T06:22:25.717Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-80709\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-16T19:26:34.515Z\", \"dateReserved\": \"2026-08-26T14:34:25.787Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-08-28T06:53:09.439Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.