FKIE_CVE-2026-98354

Vulnerability from fkie_nvd - Published: 2026-10-06 09:18 - Updated: 2026-10-06 09:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/mad: Fix receive buffer leak when PKey enforcement fails ib_mad_complete_recv() initializes mad_recv_wc->rmpp_list and then runs ib_mad_enforce_security() before linking recv_buf onto that list. On failure it calls ib_free_recv_mad(), which only walks rmpp_list and frees the ib_mad_private of every buffer found there. As the list is still empty at that point, nothing is freed at all. The caller cannot clean up either: ib_mad_recv_done() sets recv to NULL right after ib_mad_complete_recv() returns, assuming the MAD layer took ownership of the buffer. Every MAD that fails the PKey check therefore leaks one ib_mad_private (about 300 bytes per IB port MAD, ~2K for OPA), and a remote node can trigger this repeatedly by sending MADs with a wrong PKey. Link recv_buf onto rmpp_list right after the list is initialized, so the error path has something to free.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3476c28c9addfa253f505e6bd87f1f5598b961d0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/39c4ea72a40503e102ae07e6776005f96ca078a6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4617c9a856188674dddb0ca66979746d07688579
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5091e25ec503f7fc02723ca435226467b68caac7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/752b30e9d339008e5ce7eed412e9446078916129
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8e2036fb47a5b152d53eadbd35abf311bd34cc7f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bad289e42f512646a988f278f536d21547df73f1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c0d8df85db146d6275e226cb950023be69dd6c77
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/core/mad.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4617c9a856188674dddb0ca66979746d07688579",
              "status": "affected",
              "version": "47a2b338fe63200d716d2e24131cdb49f17c77da",
              "versionType": "git"
            },
            {
              "lessThan": "8e2036fb47a5b152d53eadbd35abf311bd34cc7f",
              "status": "affected",
              "version": "47a2b338fe63200d716d2e24131cdb49f17c77da",
              "versionType": "git"
            },
            {
              "lessThan": "bad289e42f512646a988f278f536d21547df73f1",
              "status": "affected",
              "version": "47a2b338fe63200d716d2e24131cdb49f17c77da",
              "versionType": "git"
            },
            {
              "lessThan": "752b30e9d339008e5ce7eed412e9446078916129",
              "status": "affected",
              "version": "47a2b338fe63200d716d2e24131cdb49f17c77da",
              "versionType": "git"
            },
            {
              "lessThan": "39c4ea72a40503e102ae07e6776005f96ca078a6",
              "status": "affected",
              "version": "47a2b338fe63200d716d2e24131cdb49f17c77da",
              "versionType": "git"
            },
            {
              "lessThan": "5091e25ec503f7fc02723ca435226467b68caac7",
              "status": "affected",
              "version": "47a2b338fe63200d716d2e24131cdb49f17c77da",
              "versionType": "git"
            },
            {
              "lessThan": "c0d8df85db146d6275e226cb950023be69dd6c77",
              "status": "affected",
              "version": "47a2b338fe63200d716d2e24131cdb49f17c77da",
              "versionType": "git"
            },
            {
              "lessThan": "3476c28c9addfa253f505e6bd87f1f5598b961d0",
              "status": "affected",
              "version": "47a2b338fe63200d716d2e24131cdb49f17c77da",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/core/mad.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": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc4",
              "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\nRDMA/mad: Fix receive buffer leak when PKey enforcement fails\n\nib_mad_complete_recv() initializes mad_recv_wc-\u003ermpp_list and then runs\nib_mad_enforce_security() before linking recv_buf onto that list.  On\nfailure it calls ib_free_recv_mad(), which only walks rmpp_list and frees\nthe ib_mad_private of every buffer found there.  As the list is still\nempty at that point, nothing is freed at all.\n\nThe caller cannot clean up either: ib_mad_recv_done() sets recv to NULL\nright after ib_mad_complete_recv() returns, assuming the MAD layer took\nownership of the buffer.  Every MAD that fails the PKey check therefore\nleaks one ib_mad_private (about 300 bytes per IB port MAD, ~2K for OPA),\nand a remote node can trigger this repeatedly by sending MADs with a\nwrong PKey.\n\nLink recv_buf onto rmpp_list right after the list is initialized, so the\nerror path has something to free."
    }
  ],
  "id": "CVE-2026-98354",
  "lastModified": "2026-10-06T09:18:28.883",
  "metrics": {},
  "published": "2026-10-06T09:18:28.883",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3476c28c9addfa253f505e6bd87f1f5598b961d0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/39c4ea72a40503e102ae07e6776005f96ca078a6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4617c9a856188674dddb0ca66979746d07688579"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5091e25ec503f7fc02723ca435226467b68caac7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/752b30e9d339008e5ce7eed412e9446078916129"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8e2036fb47a5b152d53eadbd35abf311bd34cc7f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bad289e42f512646a988f278f536d21547df73f1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c0d8df85db146d6275e226cb950023be69dd6c77"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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