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CVE-2026-23384

Estado: AnalizadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

RDMA/ionic: Fix kernel stack leak in ionic_create_cq()

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.

Detalles técnicos trazas, registros y código del informe original
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
};

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-23384",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
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          "product": "Linux",
          "versions": [
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              "versionType": "git"
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          ],
          "programFiles": [
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          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "version": "6.18.17",
              "versionType": "semver",
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              "status": "unaffected",
              "version": "6.19.7",
              "versionType": "semver",
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            },
            {
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/infiniband/hw/ionic/ionic_controlpath.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-03-25T11:16:38.633",
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      "url": "https://git.kernel.org/stable/c/547d0b07ad73915b323bc21f85c5d3252bebbbcf",
      "tags": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "url": "https://git.kernel.org/stable/c/faa72102b178c7ae6c6afea23879e7c84fc59b4e",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ]
    }
  ],
  "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->udma_mask)\n    __u8  rsvd[7];         // offset 9 - NEVER SET <- 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->udma_mask & 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."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nRDMA/ionic: Corrección de fuga de pila del kernel en ionic_create_cq()\n\nstruct ionic_cq_resp resp {\n    __u32 cqid[2];         // offset 0 - PARCIALMENTE ESTABLECIDO (ver abajo)\n    __u8  udma_mask;       // offset 8 - ESTABLECIDO (resp.udma_mask = vcq-&gt;udma_mask)\n    __u8  rsvd[7];         // offset 9 - NUNCA ESTABLECIDO &lt;- FUGA\n};\n\nrsvd[7]: 7 bytes de memoria de pila fugados incondicionalmente.\n\ncqid[2]: El bucle en la línea 1256 itera sobre udma_idx pero omite los índices donde !(vcq-&gt;udma_mask &amp; BIT(udma_idx)). El array tiene 2 entradas pero udma_count podría ser 1, lo que significa que cqid[1] podría nunca ser escrito a través de ionic_create_cq_common(). Si udma_mask solo tiene el bit 0 establecido, cqid[1] (4 bytes) también se fuga. Así que potencialmente 11 bytes fugados."
    }
  ],
  "lastModified": "2026-06-17T10:21:28.540",
  "configurations": [
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}