FKIE_CVE-2026-90415

Vulnerability from fkie_nvd - Published: 2026-09-17 17:17 - Updated: 2026-09-17 17:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: free STAG index when TPT entry write fails write_tpt_entry() allocates a new STAG index with c4iw_get_resource() and bumps stats.stag.cur before programming the entry. When write_adapter_mem() fails, it returns the error without releasing the index or reversing the statistic. No MR is inserted into rhp->mrs, so deregistration never reclaims it, leaking the index until device teardown. Record whether this call allocated the index and, on a failed write, return it to tpt_table and decrement stats.stag.cur. Key the rollback on both the write error and that flag, not the error alone: a non-reset update carries a caller-owned STAG that this call did not allocate and must not free.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2f17ca7ab5269ac2504e1039c3921373dccd7712
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5a21e5114cec4cd3f8a2843d4c46bc49634d6e96
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5fe4731bfbd8d83c4a14b4af3a27329969ce8a99
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8f6976d635d190e3d7af7103daaa581cf1ccc12e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9eeafcda1d6c11f0eec532243c4e96ec8c632bd7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a2e37d1ab773be3cd26b1c19593ca2dbcece9c57
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a64e2beb450179a5d43034af8d5476a11eac1486
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fdfb5cea4bf070cdb31d997efd87bb684df041fd
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/cxgb4/mem.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5fe4731bfbd8d83c4a14b4af3a27329969ce8a99",
              "status": "affected",
              "version": "ec3eead217181d7360a11317a888ceb30807867c",
              "versionType": "git"
            },
            {
              "lessThan": "8f6976d635d190e3d7af7103daaa581cf1ccc12e",
              "status": "affected",
              "version": "ec3eead217181d7360a11317a888ceb30807867c",
              "versionType": "git"
            },
            {
              "lessThan": "9eeafcda1d6c11f0eec532243c4e96ec8c632bd7",
              "status": "affected",
              "version": "ec3eead217181d7360a11317a888ceb30807867c",
              "versionType": "git"
            },
            {
              "lessThan": "5a21e5114cec4cd3f8a2843d4c46bc49634d6e96",
              "status": "affected",
              "version": "ec3eead217181d7360a11317a888ceb30807867c",
              "versionType": "git"
            },
            {
              "lessThan": "2f17ca7ab5269ac2504e1039c3921373dccd7712",
              "status": "affected",
              "version": "ec3eead217181d7360a11317a888ceb30807867c",
              "versionType": "git"
            },
            {
              "lessThan": "a2e37d1ab773be3cd26b1c19593ca2dbcece9c57",
              "status": "affected",
              "version": "ec3eead217181d7360a11317a888ceb30807867c",
              "versionType": "git"
            },
            {
              "lessThan": "a64e2beb450179a5d43034af8d5476a11eac1486",
              "status": "affected",
              "version": "ec3eead217181d7360a11317a888ceb30807867c",
              "versionType": "git"
            },
            {
              "lessThan": "fdfb5cea4bf070cdb31d997efd87bb684df041fd",
              "status": "affected",
              "version": "ec3eead217181d7360a11317a888ceb30807867c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/cxgb4/mem.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.5"
            },
            {
              "lessThan": "3.5",
              "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": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "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/cxgb4: free STAG index when TPT entry write fails\n\nwrite_tpt_entry() allocates a new STAG index with c4iw_get_resource() and\nbumps stats.stag.cur before programming the entry.  When\nwrite_adapter_mem() fails, it returns the error without releasing the index\nor reversing the statistic.  No MR is inserted into rhp-\u003emrs, so\nderegistration never reclaims it, leaking the index until device teardown.\n\nRecord whether this call allocated the index and, on a failed write, return\nit to tpt_table and decrement stats.stag.cur.  Key the rollback on both the\nwrite error and that flag, not the error alone: a non-reset update carries\na caller-owned STAG that this call did not allocate and must not free."
    }
  ],
  "id": "CVE-2026-90415",
  "lastModified": "2026-09-17T17:17:45.647",
  "metrics": {},
  "published": "2026-09-17T17:17:45.647",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2f17ca7ab5269ac2504e1039c3921373dccd7712"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5a21e5114cec4cd3f8a2843d4c46bc49634d6e96"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5fe4731bfbd8d83c4a14b4af3a27329969ce8a99"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8f6976d635d190e3d7af7103daaa581cf1ccc12e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9eeafcda1d6c11f0eec532243c4e96ec8c632bd7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a2e37d1ab773be3cd26b1c19593ca2dbcece9c57"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a64e2beb450179a5d43034af8d5476a11eac1486"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fdfb5cea4bf070cdb31d997efd87bb684df041fd"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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