CVE-2026-23384 (GCVE-0-2026-23384)

Vulnerability from cvelistv5 – Published: 2026-03-25 10:28 – Updated: 2026-03-25 10:28
VLAI?
Title
RDMA/ionic: Fix kernel stack leak in ionic_create_cq()
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/ionic: Fix kernel stack leak in ionic_create_cq() struct ionic_cq_resp resp { __u32 cqid[2]; // offset 0 - PARTIALLY SET (see below) __u8 udma_mask; // offset 8 - SET (resp.udma_mask = vcq->udma_mask) __u8 rsvd[7]; // offset 9 - NEVER SET <- LEAK }; rsvd[7]: 7 bytes of stack memory leaked unconditionally. cqid[2]: The loop at line 1256 iterates over udma_idx but skips indices where !(vcq->udma_mask & BIT(udma_idx)). The array has 2 entries but udma_count could be 1, meaning cqid[1] might never be written via ionic_create_cq_common(). If udma_mask only has bit 0 set, cqid[1] (4 bytes) is also leaked. So potentially 11 bytes leaked.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: e8521822c733c6deab0f339843cd37cd62c12795 , < a6f3e0fa8e862f220c26c2f27e5ddc42eb82ad3e (git)
Affected: e8521822c733c6deab0f339843cd37cd62c12795 , < 547d0b07ad73915b323bc21f85c5d3252bebbbcf (git)
Affected: e8521822c733c6deab0f339843cd37cd62c12795 , < faa72102b178c7ae6c6afea23879e7c84fc59b4e (git)
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    Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.17 , ≤ 6.18.* (semver)
Unaffected: 6.19.7 , ≤ 6.19.* (semver)
Unaffected: 7.0-rc2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/ionic/ionic_controlpath.c"
          ],
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          "vendor": "Linux",
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          "vendor": "Linux",
          "versions": [
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              "version": "6.19.7",
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              "version": "7.0-rc2",
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      "cpeApplicability": [
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                  "vulnerable": true
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                },
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/ionic: Fix kernel stack leak in ionic_create_cq()\n\nstruct ionic_cq_resp resp {\n    __u32 cqid[2];         // offset 0 - PARTIALLY SET (see below)\n    __u8  udma_mask;       // offset 8 - SET (resp.udma_mask = vcq-\u003eudma_mask)\n    __u8  rsvd[7];         // offset 9 - NEVER SET \u003c- LEAK\n};\n\nrsvd[7]: 7 bytes of stack memory leaked unconditionally.\n\ncqid[2]: The loop at line 1256 iterates over udma_idx but skips indices\nwhere !(vcq-\u003eudma_mask \u0026 BIT(udma_idx)). The array has 2 entries but\nudma_count could be 1, meaning cqid[1] might never be written via\nionic_create_cq_common(). If udma_mask only has bit 0 set, cqid[1] (4\nbytes) is also leaked. So potentially 11 bytes leaked."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-25T10:28:02.818Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a6f3e0fa8e862f220c26c2f27e5ddc42eb82ad3e"
        },
        {
          "url": "https://git.kernel.org/stable/c/547d0b07ad73915b323bc21f85c5d3252bebbbcf"
        },
        {
          "url": "https://git.kernel.org/stable/c/faa72102b178c7ae6c6afea23879e7c84fc59b4e"
        }
      ],
      "title": "RDMA/ionic: Fix kernel stack leak in ionic_create_cq()",
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        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23384",
    "datePublished": "2026-03-25T10:28:02.818Z",
    "dateReserved": "2026-01-13T15:37:46.008Z",
    "dateUpdated": "2026-03-25T10:28:02.818Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23384\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-03-25T11:16:38.633\",\"lastModified\":\"2026-03-25T15:41:33.977\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRDMA/ionic: Fix kernel stack leak in ionic_create_cq()\\n\\nstruct ionic_cq_resp resp {\\n    __u32 cqid[2];         // offset 0 - PARTIALLY SET (see below)\\n    __u8  udma_mask;       // offset 8 - SET (resp.udma_mask = vcq-\u003eudma_mask)\\n    __u8  rsvd[7];         // offset 9 - NEVER SET \u003c- LEAK\\n};\\n\\nrsvd[7]: 7 bytes of stack memory leaked unconditionally.\\n\\ncqid[2]: The loop at line 1256 iterates over udma_idx but skips indices\\nwhere !(vcq-\u003eudma_mask \u0026 BIT(udma_idx)). The array has 2 entries but\\nudma_count could be 1, meaning cqid[1] might never be written via\\nionic_create_cq_common(). If udma_mask only has bit 0 set, cqid[1] (4\\nbytes) is also leaked. So potentially 11 bytes leaked.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/547d0b07ad73915b323bc21f85c5d3252bebbbcf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a6f3e0fa8e862f220c26c2f27e5ddc42eb82ad3e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/faa72102b178c7ae6c6afea23879e7c84fc59b4e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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