Vulnerability-Lookup

GHSA-82CQ-J2Q5-4P5V

Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-14 15:32

Details

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

RDMA/cxgb4: Cancel reg_work before freeing device on remove

c4iw_uld_state_change() queues reg_work to register the RDMA device. c4iw_remove() can free ctx->dev while this work is pending or running, leaving c4iw_register_device() accessing the freed device.

Cancel reg_work before removing the device. The registration work can tear down ctx->dev when registration fails, so do not unregister or deallocate it again in that case.

This issue was found by an in-house static analysis tool.

Severity

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-89510"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-11T20:19:33Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: Cancel reg_work before freeing device on remove\n\nc4iw_uld_state_change() queues reg_work to register the RDMA device.\nc4iw_remove() can free ctx-\u003edev while this work is pending or running,\nleaving c4iw_register_device() accessing the freed device.\n\nCancel reg_work before removing the device.  The registration work can\ntear down ctx-\u003edev when registration fails, so do not unregister or\ndeallocate it again in that case.\n\nThis issue was found by an in-house static analysis tool.",
  "id": "GHSA-82cq-j2q5-4p5v",
  "modified": "2026-09-14T15:32:27Z",
  "published": "2026-09-11T21:31:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89510"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/320e5258a53af0abc5abd9eb01519a48bab2dee8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3265d558dfafab8f12f5fba06ebbf15cae9f3225"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4681e731db07769846901cfabdd3e53f765eb9d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/672ee1981db10569ec96030bddb322f18382ec04"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/85f438382a865a4dc4c50e6b884310bb2b60fc4d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a7100601aa1a39f799a566acce10db20eaf4b7f2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e6e79e7be87c5ea92728060a3d7fb56890a91e45"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe9c591026c576d8b1f72aab5e4cd67350530763"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-89510 (GCVE-0-2026-89510)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-09-14 12:00

Title

RDMA/cxgb4: Cancel reg_work before freeing device on remove

Summary

In the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: Cancel reg_work before freeing device on remove c4iw_uld_state_change() queues reg_work to register the RDMA device. c4iw_remove() can free ctx->dev while this work is pending or running, leaving c4iw_register_device() accessing the freed device. Cancel reg_work before removing the device. The registration work can tear down ctx->dev when registration fails, so do not unregister or deallocate it again in that case. This issue was found by an in-house static analysis tool.

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

References

8 references

URL	Tags
https://git.kernel.org/stable/c/e6e79e7be87c5ea92…
https://git.kernel.org/stable/c/672ee1981db10569e…
https://git.kernel.org/stable/c/4681e731db0776984…
https://git.kernel.org/stable/c/3265d558dfafab8f1…
https://git.kernel.org/stable/c/fe9c591026c576d8b…
https://git.kernel.org/stable/c/85f438382a865a4dc…
https://git.kernel.org/stable/c/320e5258a53af0abc…
https://git.kernel.org/stable/c/a7100601aa1a39f79…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 , < e6e79e7be87c5ea92728060a3d7fb56890a91e45 (git) Affected: 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 , < 672ee1981db10569ec96030bddb322f18382ec04 (git) Affected: 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 , < 4681e731db07769846901cfabdd3e53f765eb9d3 (git) Affected: 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 , < 3265d558dfafab8f12f5fba06ebbf15cae9f3225 (git) Affected: 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 , < fe9c591026c576d8b1f72aab5e4cd67350530763 (git) Affected: 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 , < 85f438382a865a4dc4c50e6b884310bb2b60fc4d (git) Affected: 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 , < 320e5258a53af0abc5abd9eb01519a48bab2dee8 (git) Affected: 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 , < a7100601aa1a39f799a566acce10db20eaf4b7f2 (git)
Linux	Linux	Affected: 4.15 Unaffected: 0 , < 4.15 (semver) Unaffected: 5.10.270 , ≤ 5.10.* (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.109 , ≤ 6.12.* (semver) Unaffected: 6.18.50 , ≤ 6.18.* (semver) Unaffected: 7.2.4 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/cxgb4/device.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e6e79e7be87c5ea92728060a3d7fb56890a91e45",
              "status": "affected",
              "version": "1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5",
              "versionType": "git"
            },
            {
              "lessThan": "672ee1981db10569ec96030bddb322f18382ec04",
              "status": "affected",
              "version": "1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5",
              "versionType": "git"
            },
            {
              "lessThan": "4681e731db07769846901cfabdd3e53f765eb9d3",
              "status": "affected",
              "version": "1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5",
              "versionType": "git"
            },
            {
              "lessThan": "3265d558dfafab8f12f5fba06ebbf15cae9f3225",
              "status": "affected",
              "version": "1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5",
              "versionType": "git"
            },
            {
              "lessThan": "fe9c591026c576d8b1f72aab5e4cd67350530763",
              "status": "affected",
              "version": "1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5",
              "versionType": "git"
            },
            {
              "lessThan": "85f438382a865a4dc4c50e6b884310bb2b60fc4d",
              "status": "affected",
              "version": "1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5",
              "versionType": "git"
            },
            {
              "lessThan": "320e5258a53af0abc5abd9eb01519a48bab2dee8",
              "status": "affected",
              "version": "1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5",
              "versionType": "git"
            },
            {
              "lessThan": "a7100601aa1a39f799a566acce10db20eaf4b7f2",
              "status": "affected",
              "version": "1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5",
              "versionType": "git"
            }
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        },
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/cxgb4/device.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.15"
            },
            {
              "lessThan": "4.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "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": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "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": "5.10.270",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.109",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: Cancel reg_work before freeing device on remove\n\nc4iw_uld_state_change() queues reg_work to register the RDMA device.\nc4iw_remove() can free ctx-\u003edev while this work is pending or running,\nleaving c4iw_register_device() accessing the freed device.\n\nCancel reg_work before removing the device.  The registration work can\ntear down ctx-\u003edev when registration fails, so do not unregister or\ndeallocate it again in that case.\n\nThis issue was found by an in-house static analysis tool."
        }
      ],
      "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 UAF is reached from c4iw_remove() on local Chelsio T4/T5/T6 RDMA teardown (iw_cxgb4 rmmod, PCI sysfs unbind/hot-remove, EEH reset, or ULD STATE_DOWN/DETACH/FATAL). reg_work is queued from local STATE_UP (cxgb_open/uld_attach), not from c4iw_uld_rx_handler packet processing.\nAC:L - An attacker queues c4iw_register_device via STATE_UP (first cxgb_open or iw_cxgb4 load) then immediately runs c4iw_remove via unbind/rmmod/EEH, controlling both sides of the missing cancel_work_sync race and retrying bind/unbind until the worker uses freed ctx-\u003edev; such UAFs score AC:L.\nPR:L - Per CNA driver-removal UAF precedent, an unprivileged local user on Chelsio iWARP/HPC hosts can spray the freed c4iw_dev/ib_device while privileged or automated teardown proceeds; init-namespace root is not required for the UAF itself.\nUI:N - No victim action such as mounting a filesystem or opening a file is required; the attacker queues reg_work and coordinates driver removal themselves, or piggybacks on routine PCI/module teardown.\nS:U - The use-after-free corrupts the host kernel c4iw_dev/ib_device heap object within the same security authority; it is not a VM escape, IOMMU/DMA isolation bypass, or sandbox breakout.\nC:H - After c4iw_dealloc()/ib_dealloc_device(), c4iw_register_device() still reads ctx-\u003edev (node_guid, ports, ibdev ops) from the freed ib_device; this kernel heap UAF enables arbitrary disclosure via slab reuse.\nI:H - The dangling worker writes ibdev fields, may call ib_register_device() on freed memory, and can double-free via c4iw_dealloc(); heap spraying the ib_device ops table yields write and control-flow hijack primitives.\nA:H - Use-after-free of c4iw_dev from workqueue context during remove causes a kernel oops or panic even when not fully exploited, so availability impact is High."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T12:00:36.409Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e6e79e7be87c5ea92728060a3d7fb56890a91e45"
        },
        {
          "url": "https://git.kernel.org/stable/c/672ee1981db10569ec96030bddb322f18382ec04"
        },
        {
          "url": "https://git.kernel.org/stable/c/4681e731db07769846901cfabdd3e53f765eb9d3"
        },
        {
          "url": "https://git.kernel.org/stable/c/3265d558dfafab8f12f5fba06ebbf15cae9f3225"
        },
        {
          "url": "https://git.kernel.org/stable/c/fe9c591026c576d8b1f72aab5e4cd67350530763"
        },
        {
          "url": "https://git.kernel.org/stable/c/85f438382a865a4dc4c50e6b884310bb2b60fc4d"
        },
        {
          "url": "https://git.kernel.org/stable/c/320e5258a53af0abc5abd9eb01519a48bab2dee8"
        },
        {
          "url": "https://git.kernel.org/stable/c/a7100601aa1a39f799a566acce10db20eaf4b7f2"
        }
      ],
      "title": "RDMA/cxgb4: Cancel reg_work before freeing device on remove",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89510",
    "datePublished": "2026-09-11T19:43:55.989Z",
    "dateReserved": "2026-09-11T19:38:34.716Z",
    "dateUpdated": "2026-09-14T12:00:36.409Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.
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