CVE-2026-92509 (GCVE-0-2026-92509)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:10 – Updated: 2026-09-17 16:10
VLAI
Title
RDMA/core: Fix potential use after free in counter_release()
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Fix potential use after free in counter_release() When accessing a counter via the netlink path the only synchronization mechanism for the said counter is rdma_restrack_get(). Currently, rdma_restrack_del() is invoked at the end of counter_release(), which is too late, since by that point vendor-specific resources associated with the counter might already be freed. This can leave a short window where the counter remains accessible through restrack, leading to a potential use-after-free. Fix this by moving the rdma_restrack_del() call to be before the freeing of the vendor-specific resources, ensuring that the counter is removed from restrack before its internal resources are released. This guarantees that no new users hold references to a counter that is in the process of destruction.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 99fa331dc8629be55ac7a0cca0dc56492070ddac , < 5eb0c57a8b568eb08f464861d84d518a2af939ac (git)
Affected: 99fa331dc8629be55ac7a0cca0dc56492070ddac , < d5cc211e8c39e46f357d30a092d683e84d560de9 (git)
Affected: 99fa331dc8629be55ac7a0cca0dc56492070ddac , < 2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5b (git)
Affected: 99fa331dc8629be55ac7a0cca0dc56492070ddac , < 8c013e3a8d8273da4d47bf1c27f016a3551996f5 (git)
Affected: 99fa331dc8629be55ac7a0cca0dc56492070ddac , < 64c72390d8407ea86de712a477c796b07d37abc4 (git)
Affected: 99fa331dc8629be55ac7a0cca0dc56492070ddac , < 235ef2d0e750885c29340b0fc40620a7a4f52e12 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.3
Unaffected: 0 , < 5.3 (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/core/counters.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5eb0c57a8b568eb08f464861d84d518a2af939ac",
              "status": "affected",
              "version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
              "versionType": "git"
            },
            {
              "lessThan": "d5cc211e8c39e46f357d30a092d683e84d560de9",
              "status": "affected",
              "version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
              "versionType": "git"
            },
            {
              "lessThan": "2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5b",
              "status": "affected",
              "version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
              "versionType": "git"
            },
            {
              "lessThan": "8c013e3a8d8273da4d47bf1c27f016a3551996f5",
              "status": "affected",
              "version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
              "versionType": "git"
            },
            {
              "lessThan": "64c72390d8407ea86de712a477c796b07d37abc4",
              "status": "affected",
              "version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
              "versionType": "git"
            },
            {
              "lessThan": "235ef2d0e750885c29340b0fc40620a7a4f52e12",
              "status": "affected",
              "version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/core/counters.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.3"
            },
            {
              "lessThan": "5.3",
              "status": "unaffected",
              "version": "0",
              "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix potential use after free in counter_release()\n\nWhen accessing a counter via the netlink path the only synchronization\nmechanism for the said counter is rdma_restrack_get().\nCurrently, rdma_restrack_del() is invoked at the end of\ncounter_release(), which is too late, since by that point\nvendor-specific resources associated with the counter might already be\nfreed. This can leave a short window where the counter remains\naccessible through restrack, leading to a potential use-after-free.\n\nFix this by moving the rdma_restrack_del() call to be before the\nfreeing of the vendor-specific resources, ensuring that the counter is\nremoved from restrack before its internal resources are released.\nThis guarantees that no new users hold references to a counter that is\nin the process of destruction."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:10:20.100Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5eb0c57a8b568eb08f464861d84d518a2af939ac"
        },
        {
          "url": "https://git.kernel.org/stable/c/d5cc211e8c39e46f357d30a092d683e84d560de9"
        },
        {
          "url": "https://git.kernel.org/stable/c/2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5b"
        },
        {
          "url": "https://git.kernel.org/stable/c/8c013e3a8d8273da4d47bf1c27f016a3551996f5"
        },
        {
          "url": "https://git.kernel.org/stable/c/64c72390d8407ea86de712a477c796b07d37abc4"
        },
        {
          "url": "https://git.kernel.org/stable/c/235ef2d0e750885c29340b0fc40620a7a4f52e12"
        }
      ],
      "title": "RDMA/core: Fix potential use after free in counter_release()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-92509",
    "datePublished": "2026-09-17T16:10:20.100Z",
    "dateReserved": "2026-09-16T12:21:13.872Z",
    "dateUpdated": "2026-09-17T16:10:20.100Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-92509",
      "date": "2026-09-29",
      "epss": "0.00173",
      "percentile": "0.05947"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-23T02:57:51.000Z",
      "cve": "CVE-2026-92509",
      "id": "msrc_CVE-2026-92509",
      "initial_release_date": "2026-09-19T01:04:46.000Z",
      "product_status:known_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "RDMA/core: Fix potential use after free in counter_release()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-92509.json",
      "version": "2"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/infiniband/core/counters.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "5eb0c57a8b568eb08f464861d84d518a2af939ac",
                    "status": "affected",
                    "version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "d5cc211e8c39e46f357d30a092d683e84d560de9",
                    "status": "affected",
                    "version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5b",
                    "status": "affected",
                    "version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "8c013e3a8d8273da4d47bf1c27f016a3551996f5",
                    "status": "affected",
                    "version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "64c72390d8407ea86de712a477c796b07d37abc4",
                    "status": "affected",
                    "version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "235ef2d0e750885c29340b0fc40620a7a4f52e12",
                    "status": "affected",
                    "version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/infiniband/core/counters.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "5.3"
                  },
                  {
                    "lessThan": "5.3",
                    "status": "unaffected",
                    "version": "0",
                    "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/core: Fix potential use after free in counter_release()\n\nWhen accessing a counter via the netlink path the only synchronization\nmechanism for the said counter is rdma_restrack_get().\nCurrently, rdma_restrack_del() is invoked at the end of\ncounter_release(), which is too late, since by that point\nvendor-specific resources associated with the counter might already be\nfreed. This can leave a short window where the counter remains\naccessible through restrack, leading to a potential use-after-free.\n\nFix this by moving the rdma_restrack_del() call to be before the\nfreeing of the vendor-specific resources, ensuring that the counter is\nremoved from restrack before its internal resources are released.\nThis guarantees that no new users hold references to a counter that is\nin the process of destruction."
          }
        ],
        "id": "CVE-2026-92509",
        "lastModified": "2026-09-17T17:17:53.590",
        "metrics": {},
        "published": "2026-09-17T17:17:53.590",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/235ef2d0e750885c29340b0fc40620a7a4f52e12"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5b"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/5eb0c57a8b568eb08f464861d84d518a2af939ac"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/64c72390d8407ea86de712a477c796b07d37abc4"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/8c013e3a8d8273da4d47bf1c27f016a3551996f5"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/d5cc211e8c39e46f357d30a092d683e84d560de9"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-22T16:26:32Z",
      "cve": "CVE-2026-92509",
      "id": "CVE-2026-92509",
      "initial_release_date": "2026-09-18T00:13:25Z",
      "product_status:known_affected": "193",
      "product_status:known_not_affected": "154",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-92509",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-92509.json",
      "version": "4"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



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.