Vulnerability-Lookup

GHSA-9PWF-89R7-36H6

Vulnerability from github – Published: 2025-09-17 15:30 – Updated: 2025-12-11 18:30

Details

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

RDMA/cxgb4: Fix potential null-ptr-deref in pass_establish()

If get_ep_from_tid() fails to lookup non-NULL value for ep, ep is dereferenced later regardless of whether it is empty. This patch adds a simple sanity check to fix the issue.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Severity

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2023-53335"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-17T15:15:36Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: Fix potential null-ptr-deref in pass_establish()\n\nIf get_ep_from_tid() fails to lookup non-NULL value for ep, ep is\ndereferenced later regardless of whether it is empty.\nThis patch adds a simple sanity check to fix the issue.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE.",
  "id": "GHSA-9pwf-89r7-36h6",
  "modified": "2025-12-11T18:30:32Z",
  "published": "2025-09-17T15:30:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53335"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/283861a4c52c1ea4df3dd1b6fc75a50796ce3524"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2cfc00e974d75a3aa8155f2660f57d342e1f67ca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9dca64042d855a24b0bd81ce242e5dc7e939f6eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ddc77eefb2a567b705c3c86ab2ddabe43cadf1b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2023-53335 (GCVE-0-2023-53335)

Vulnerability from cvelistv5 – Published: 2025-09-17 14:56 – Updated: 2026-08-05 09:13

Title

RDMA/cxgb4: Fix potential null-ptr-deref in pass_establish()

Summary

In the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: Fix potential null-ptr-deref in pass_establish() If get_ep_from_tid() fails to lookup non-NULL value for ep, ep is dereferenced later regardless of whether it is empty. This patch adds a simple sanity check to fix the issue. Found by Linux Verification Center (linuxtesting.org) with SVACE.

Severity

7.5 (High)


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

5.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-14 18:37 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/9dca64042d855a24b…
https://git.kernel.org/stable/c/2cfc00e974d75a3aa…
https://git.kernel.org/stable/c/9ddc77eefb2a567b7…
https://git.kernel.org/stable/c/283861a4c52c1ea4d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 944661dd97f4f257cd914fffec7eb80832ff9141 , < 9dca64042d855a24b0bd81ce242e5dc7e939f6eb (git) Affected: 944661dd97f4f257cd914fffec7eb80832ff9141 , < 2cfc00e974d75a3aa8155f2660f57d342e1f67ca (git) Affected: 944661dd97f4f257cd914fffec7eb80832ff9141 , < 9ddc77eefb2a567b705c3c86ab2ddabe43cadf1b (git) Affected: 944661dd97f4f257cd914fffec7eb80832ff9141 , < 283861a4c52c1ea4df3dd1b6fc75a50796ce3524 (git)
Linux	Linux	Affected: 4.7 Unaffected: 0 , < 4.7 (semver) Unaffected: 5.15.99 , ≤ 5.15.* (semver) Unaffected: 6.1.16 , ≤ 6.1.* (semver) Unaffected: 6.2.3 , ≤ 6.2.* (semver) Unaffected: 6.3 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2023-53335",
                "options": [
                  {
                    "Exploitation": "none"
                  },
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T18:37:23.151348Z",
                "version": "2.0.3"
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            }
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            "descriptions": [
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                "type": "CWE"
              }
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        "providerMetadata": {
          "dateUpdated": "2026-01-14T18:43:00.832Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/cxgb4/cm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "status": "affected",
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            {
              "lessThan": "2cfc00e974d75a3aa8155f2660f57d342e1f67ca",
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              "versionType": "git"
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            {
              "lessThan": "283861a4c52c1ea4df3dd1b6fc75a50796ce3524",
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              "version": "944661dd97f4f257cd914fffec7eb80832ff9141",
              "versionType": "git"
            }
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        },
        {
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          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.7"
            },
            {
              "lessThan": "4.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.99",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.99",
                  "versionStartIncluding": "4.7",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "4.7",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: Fix potential null-ptr-deref in pass_establish()\n\nIf get_ep_from_tid() fails to lookup non-NULL value for ep, ep is\ndereferenced later regardless of whether it is empty.\nThis patch adds a simple sanity check to fix the issue.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."
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          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - pass_establish() runs on CPL_PASS_ESTABLISH from the Chelsio TOE after a remote TCP peer completes the handshake to an iw_cxgb4 iWARP listener (c4iw_uld_rx_handler \u2192 sched \u2192 workqueue), so a network peer drives the path over TCP/IP with no local access.\nAC:L - The atomic tid-table design expects CPLs after ep removal, and a remote peer that connects then aborts can force peer_abort() to release_ep_resources() while PASS_ESTABLISH is still queued, reliably producing the NULL lookup the other handlers already guard against.\nPR:N - PASS_ESTABLISH is raised at TCP establish time, before MPA/RDMA authentication, so an unauthenticated remote peer only needs to reach an already-listening iWARP port\u2014no local account or credentials.\nUI:N - The attacker opens and aborts connections itself against an already-listening RDMA/iWARP service; no separate victim action is required at exploit time.\nS:U - The resulting kernel oops/panic stays within the host kernel security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:N - This is a pure NULL pointer dereference of a failed get_ep_from_tid() result (address 0), with no out-of-bounds read, UAF of a dangling object, or other disclosure primitive.\nI:N - The fault is a NULL read with no memory write, type confusion, or control-flow hijack path beyond the ensuing oops.\nA:H - Dereferencing the NULL ep (ep-\u003ehwtid / ep-\u003esnd_seq) causes a kernel oops/panic in the iw_cxgb4 workqueue context, which a remote peer can trigger repeatedly for full denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:13:34.431Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.