Vulnerability-Lookup

FKIE_CVE-2026-46178

Vulnerability from fkie_nvd - Published: 2026-05-28 10:16 - Updated: 2026-06-17 10:53

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx4: Fix resource leak on error in mlx4_ib_create_srq() Sashiko points out that mlx4_srq_alloc() was not undone during error unwind, add the missing call to mlx4_srq_free().

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0be6ae614ca7fa53e7389e3c7462ed20abbd4192	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0dbd619716fb07b7de1acd64fec673ee6e1adde7	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/388617f44d81604a760742a0b5de292d411e63e3	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/53fd4c03558672ccb167754fbacbf045c7ab335c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5b3b220d54e6a3d77380cb7caa1ef79cb8f4fc94	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c54c7e4cb679c0aaa1cb489b9c3f2cd98e63a44c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c5dc30da990045105c9762248d23076223e7878a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e01b8c9286c470b71a38acd320106f2c4f2826a1	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.1
linux	linux_kernel	7.1

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/mlx4/srq.c"
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx4: Fix resource leak on error in mlx4_ib_create_srq()\n\nSashiko points out that mlx4_srq_alloc() was not undone during error\nunwind, add the missing call to mlx4_srq_free()."
    }
  ],
  "id": "CVE-2026-46178",
  "lastModified": "2026-06-17T10:53:13.490",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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  "published": "2026-05-28T10:16:33.423",
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          "lang": "en",
          "value": "CWE-401"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-46178 (GCVE-0-2026-46178)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-08-05 12:30

Title

RDMA/mlx4: Fix resource leak on error in mlx4_ib_create_srq()

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/53fd4c03558672ccb…
https://git.kernel.org/stable/c/0be6ae614ca7fa53e…
https://git.kernel.org/stable/c/5b3b220d54e6a3d77…
https://git.kernel.org/stable/c/c5dc30da990045105…
https://git.kernel.org/stable/c/0dbd619716fb07b7d…
https://git.kernel.org/stable/c/e01b8c9286c470b71…
https://git.kernel.org/stable/c/388617f44d81604a7…
https://git.kernel.org/stable/c/c54c7e4cb679c0aaa…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 225c7b1feef1b41170f7037a5b10a65cd8a42c54 , < 53fd4c03558672ccb167754fbacbf045c7ab335c (git) Affected: 225c7b1feef1b41170f7037a5b10a65cd8a42c54 , < 0be6ae614ca7fa53e7389e3c7462ed20abbd4192 (git) Affected: 225c7b1feef1b41170f7037a5b10a65cd8a42c54 , < 5b3b220d54e6a3d77380cb7caa1ef79cb8f4fc94 (git) Affected: 225c7b1feef1b41170f7037a5b10a65cd8a42c54 , < c5dc30da990045105c9762248d23076223e7878a (git) Affected: 225c7b1feef1b41170f7037a5b10a65cd8a42c54 , < 0dbd619716fb07b7de1acd64fec673ee6e1adde7 (git) Affected: 225c7b1feef1b41170f7037a5b10a65cd8a42c54 , < e01b8c9286c470b71a38acd320106f2c4f2826a1 (git) Affected: 225c7b1feef1b41170f7037a5b10a65cd8a42c54 , < 388617f44d81604a760742a0b5de292d411e63e3 (git) Affected: 225c7b1feef1b41170f7037a5b10a65cd8a42c54 , < c54c7e4cb679c0aaa1cb489b9c3f2cd98e63a44c (git)
Linux	Linux	Affected: 2.6.22 Unaffected: 0 , < 2.6.22 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/mlx4/srq.c"
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx4: Fix resource leak on error in mlx4_ib_create_srq()\n\nSashiko points out that mlx4_srq_alloc() was not undone during error\nunwind, add the missing call to mlx4_srq_free()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable path is reached only through the local RDMA uverbs device interface (/dev/infiniband/uverbsN) via a create-SRQ command with driver udata present; it is not reachable from a network peer.\nAC:L - The attacker reliably forces the failing path by supplying a bad/unmapped response buffer (`copy_to_user` \u2192 -EFAULT), which deterministically creates the dangling radix-tree pointer to freed memory; per UAF guidance this is Low.\nPR:L - Triggering requires only an unprivileged local account with access to the RDMA verbs device, which is commonly exposed to non-root users in HPC/cloud/RDMA-enabled environments; no real root is needed.\nUI:N - The attacker performs the create-SRQ call and supplies the faulting buffer entirely on their own; no victim action is required.\nS:U - The freed object and its corruption stay within the kernel\u0027s own security authority; there is no crossing of a VM/IOMMU/sandbox boundary.\nC:H - The dangling pointer is a use-after-free; reclaiming the freed `mlx4_ib_srq` lets an attacker control its contents and read kernel memory through the event-handler dereference chain.\nI:H - The UAF causes `mlx4_srq_event()` to write to freed memory and call function pointers (`srq-\u003eevent`, `event_handler`) read from freed memory, giving a heap-spray-based control-flow-hijack / arbitrary-write primitive.\nA:H - Dereferencing the freed object reliably crashes the kernel, and repeatedly exercising the bug also exhausts the finite hardware SRQ/ICM resource pool, denying RDMA service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:30:16.484Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/53fd4c03558672ccb167754fbacbf045c7ab335c"
        },
        {
          "url": "https://git.kernel.org/stable/c/0be6ae614ca7fa53e7389e3c7462ed20abbd4192"
        },
        {
          "url": "https://git.kernel.org/stable/c/5b3b220d54e6a3d77380cb7caa1ef79cb8f4fc94"
        },
        {
          "url": "https://git.kernel.org/stable/c/c5dc30da990045105c9762248d23076223e7878a"
        },
        {
          "url": "https://git.kernel.org/stable/c/0dbd619716fb07b7de1acd64fec673ee6e1adde7"
        },
        {
          "url": "https://git.kernel.org/stable/c/e01b8c9286c470b71a38acd320106f2c4f2826a1"
        },
        {
          "url": "https://git.kernel.org/stable/c/388617f44d81604a760742a0b5de292d411e63e3"
        },
        {
          "url": "https://git.kernel.org/stable/c/c54c7e4cb679c0aaa1cb489b9c3f2cd98e63a44c"
        }
      ],
      "title": "RDMA/mlx4: Fix resource leak on error in mlx4_ib_create_srq()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46178",
    "datePublished": "2026-05-28T09:36:32.222Z",
    "dateReserved": "2026-05-13T15:03:33.103Z",
    "dateUpdated": "2026-08-05T12:30:16.484Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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FKIE_CVE-2026-46178

CVE-2026-46178 (GCVE-0-2026-46178)

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