FKIE_CVE-2026-89528

Vulnerability from fkie_nvd - Published: 2026-09-11 20:19 - Updated: 2026-10-30 13:20
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: svcrdma: Reject Read lists that exceed the page budget Individual Read segment lengths are validated at decode time, but nothing prevents a requester from sending multiple segments whose cumulative length exceeds the rq_pages array budget. When one segment fills the page array exactly, the runtime guard in svc_rdma_build_read_segment() is bypassed because len reaches zero. A subsequent segment then accesses the NULL sentinel slot at rq_pages[rq_maxpages], resulting in a NULL pointer dereference during DMA mapping. Accumulate pages across all Read segments and reject the message at decode time when the total would overflow the page budget.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/08aa4162df91880a79be744aaa9570b04d4875c4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0ca487abb3bdf581851664b5db21f364caf57682
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1a3af2262cb384112ef38632de4690682be528b4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/465f511f59a0fa7a80d5d1073c4b24f28ea38f58
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/beb4e9801f6362436102acc4cc5304b7324f9365
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e70fdb121171c3eb0ac34eb545721828cd737717
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sunrpc/xprtrdma/svc_rdma_recvfrom.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "08aa4162df91880a79be744aaa9570b04d4875c4",
              "status": "affected",
              "version": "026d958b38c628a1b4ced534808945365e2747a5",
              "versionType": "git"
            },
            {
              "lessThan": "beb4e9801f6362436102acc4cc5304b7324f9365",
              "status": "affected",
              "version": "026d958b38c628a1b4ced534808945365e2747a5",
              "versionType": "git"
            },
            {
              "lessThan": "e70fdb121171c3eb0ac34eb545721828cd737717",
              "status": "affected",
              "version": "026d958b38c628a1b4ced534808945365e2747a5",
              "versionType": "git"
            },
            {
              "lessThan": "1a3af2262cb384112ef38632de4690682be528b4",
              "status": "affected",
              "version": "026d958b38c628a1b4ced534808945365e2747a5",
              "versionType": "git"
            },
            {
              "lessThan": "465f511f59a0fa7a80d5d1073c4b24f28ea38f58",
              "status": "affected",
              "version": "026d958b38c628a1b4ced534808945365e2747a5",
              "versionType": "git"
            },
            {
              "lessThan": "0ca487abb3bdf581851664b5db21f364caf57682",
              "status": "affected",
              "version": "026d958b38c628a1b4ced534808945365e2747a5",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sunrpc/xprtrdma/svc_rdma_recvfrom.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.13"
            },
            {
              "lessThan": "4.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.114",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsvcrdma: Reject Read lists that exceed the page budget\n\nIndividual Read segment lengths are validated at decode time, but\nnothing prevents a requester from sending multiple segments whose\ncumulative length exceeds the rq_pages array budget. When one\nsegment fills the page array exactly, the runtime guard in\nsvc_rdma_build_read_segment() is bypassed because len reaches zero.\nA subsequent segment then accesses the NULL sentinel slot at\nrq_pages[rq_maxpages], resulting in a NULL pointer dereference during\nDMA mapping.\n\nAccumulate pages across all Read segments and reject the message at\ndecode time when the total would overflow the page budget."
    }
  ],
  "id": "CVE-2026-89528",
  "lastModified": "2026-10-30T13:20:18.690",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-89528",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-16T19:23:02.453234Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-11T20:19:35.613",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/08aa4162df91880a79be744aaa9570b04d4875c4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0ca487abb3bdf581851664b5db21f364caf57682"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1a3af2262cb384112ef38632de4690682be528b4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/465f511f59a0fa7a80d5d1073c4b24f28ea38f58"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/beb4e9801f6362436102acc4cc5304b7324f9365"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e70fdb121171c3eb0ac34eb545721828cd737717"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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