Vulnerability-Lookup

CVE-2026-98347 (GCVE-0-2026-98347)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:46 – Updated: 2026-10-06 08:46

Title

IB/IPoIB: Avoid restoring OPER_UP after multicast flush

Summary

In the Linux kernel, the following vulnerability has been resolved: IB/IPoIB: Avoid restoring OPER_UP after multicast flush ipoib_ib_dev_flush_light() temporarily clears IPOIB_FLAG_OPER_UP to prevent multicast joins while ipoib_mcast_dev_flush() is running, and restores the flag afterwards if it was previously set. This restore races with ipoib_ib_dev_down(). If the interface is brought down while the flush is in progress, ipoib_ib_dev_down() clears IPOIB_FLAG_OPER_UP, but the flush path may set it again after the device has already gone down. Since commit 894021a75291 ("IB/ipoib: Make the carrier_on_task race aware"), ipoib_mcast_carrier_on_task() relies on IPOIB_FLAG_OPER_UP being cleared to terminate its rtnl_trylock() retry loop. If the flag is left set after shutdown, the workqueue retries forever, causing teardown to deadlock when ipoib_ndo_uninit() waits in destroy_workqueue() while holding RTNL. Instead of overloading IPOIB_FLAG_OPER_UP to block multicast joins during a light flush, introduce a dedicated IPOIB_FLAG_MCAST_FLUSH flag. Use it together with IPOIB_FLAG_OPER_UP to determine whether multicast joins are allowed, avoiding the race with device shutdown.

Severity

No CVSS data available.

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/f973769fb7cb33ba0…
https://git.kernel.org/stable/c/b72f38929f4b5aa83…
https://git.kernel.org/stable/c/1b11e4b55b41d9e69…
https://git.kernel.org/stable/c/326f7d34bd7e64de5…
https://git.kernel.org/stable/c/5ad925d45f28464a5…
https://git.kernel.org/stable/c/188b334a6db36a8e0…
https://git.kernel.org/stable/c/1ff3add37c329704e…
https://git.kernel.org/stable/c/9a141d3dc869d18b2…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 344bacca8cd811809fc33a249f2738ab757d327f , < f973769fb7cb33ba0d4a64b7dcfee0cabaead938 (git) Affected: 344bacca8cd811809fc33a249f2738ab757d327f , < b72f38929f4b5aa83161fd3b22a7327207e51ec5 (git) Affected: 344bacca8cd811809fc33a249f2738ab757d327f , < 1b11e4b55b41d9e69a8e8d07622614202e2eaca9 (git) Affected: 344bacca8cd811809fc33a249f2738ab757d327f , < 326f7d34bd7e64de535566b65c0533b640df5a81 (git) Affected: 344bacca8cd811809fc33a249f2738ab757d327f , < 5ad925d45f28464a5e043c9620880bb6a030da89 (git) Affected: 344bacca8cd811809fc33a249f2738ab757d327f , < 188b334a6db36a8e0bfaaf59bc4020639a0f3aad (git) Affected: 344bacca8cd811809fc33a249f2738ab757d327f , < 1ff3add37c329704ec46181b4ae4f00f9f16ce6f (git) Affected: 344bacca8cd811809fc33a249f2738ab757d327f , < 9a141d3dc869d18b2eab35e999f4790a9b84e40f (git) Affected: a289c65ca49d2680a3d797e633e57a45573d1df2 (git) Affected: b81459c78935e4579a577b2366c5f8878d3c7fee (git) Affected: 8a9d8dc9ce83a90bfbbe69181acc4cf1beff46f5 (git) Affected: dfe809702a11bd7fb91c882fb55620e39ce22109 (git) Affected: 87160fb51bc343793cc8f5f031a87f1a35aecb82 (git) Affected: 749fd55dd210f9676f0d445a6efaaa3bec65174a (git) Affected: 3.2.84 , < 3.3 (semver) Affected: 3.10.105 , < 3.11 (semver) Affected: 3.12.65 , < 3.13 (semver) Affected: 3.16.39 , < 3.17 (semver) Affected: 4.4.24 , < 4.5 (semver) Affected: 4.7.7 , < 4.8 (semver)	guessed
Linux	Linux	Affected: 4.8 Unaffected: 0 , < 4.8 (semver) Unaffected: 5.10.271 , ≤ 5.10.* (semver) Unaffected: 5.15.222 , ≤ 5.15.* (semver) Unaffected: 6.1.189 , ≤ 6.1.* (semver) Unaffected: 6.6.158 , ≤ 6.6.* (semver) Unaffected: 6.12.112 , ≤ 6.12.* (semver) Unaffected: 6.18.54 , ≤ 6.18.* (semver) Unaffected: 7.2.8 , ≤ 7.2.* (semver) Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

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{
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              "version": "dfe809702a11bd7fb91c882fb55620e39ce22109",
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            "drivers/infiniband/ulp/ipoib/ipoib_ib.c",
            "drivers/infiniband/ulp/ipoib/ipoib_multicast.c"
          ],
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            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
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              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
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              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
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            },
            {
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              "status": "unaffected",
              "version": "7.3-rc4",
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            }
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nIB/IPoIB: Avoid restoring OPER_UP after multicast flush\n\nipoib_ib_dev_flush_light() temporarily clears IPOIB_FLAG_OPER_UP to\nprevent multicast joins while ipoib_mcast_dev_flush() is running, and\nrestores the flag afterwards if it was previously set.\n\nThis restore races with ipoib_ib_dev_down(). If the interface is brought\ndown while the flush is in progress, ipoib_ib_dev_down() clears\nIPOIB_FLAG_OPER_UP, but the flush path may set it again after the device\nhas already gone down.\n\nSince commit 894021a75291 (\"IB/ipoib: Make the carrier_on_task race\naware\"), ipoib_mcast_carrier_on_task() relies on IPOIB_FLAG_OPER_UP\nbeing cleared to terminate its rtnl_trylock() retry loop. If the flag is\nleft set after shutdown, the workqueue retries forever, causing teardown\nto deadlock when ipoib_ndo_uninit() waits in destroy_workqueue() while\nholding RTNL.\n\nInstead of overloading IPOIB_FLAG_OPER_UP to block multicast joins\nduring a light flush, introduce a dedicated IPOIB_FLAG_MCAST_FLUSH flag.\nUse it together with IPOIB_FLAG_OPER_UP to determine whether multicast\njoins are allowed, avoiding the race with device shutdown."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-06T08:46:36.136Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f973769fb7cb33ba0d4a64b7dcfee0cabaead938"
        },
        {
          "url": "https://git.kernel.org/stable/c/b72f38929f4b5aa83161fd3b22a7327207e51ec5"
        },
        {
          "url": "https://git.kernel.org/stable/c/1b11e4b55b41d9e69a8e8d07622614202e2eaca9"
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          "url": "https://git.kernel.org/stable/c/326f7d34bd7e64de535566b65c0533b640df5a81"
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        {
          "url": "https://git.kernel.org/stable/c/1ff3add37c329704ec46181b4ae4f00f9f16ce6f"
        },
        {
          "url": "https://git.kernel.org/stable/c/9a141d3dc869d18b2eab35e999f4790a9b84e40f"
        }
      ],
      "title": "IB/IPoIB: Avoid restoring OPER_UP after multicast flush",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98347",
    "datePublished": "2026-10-06T08:46:36.136Z",
    "dateReserved": "2026-09-25T10:25:14.343Z",
    "dateUpdated": "2026-10-06T08:46:36.136Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
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      "cve": "CVE-2026-98347",
      "date": "2026-10-06",
      "epss": "0.00184",
      "percentile": "0.07296"
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    "nvd": {
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                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.189",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.158",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.112",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.54",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.2.*",
                    "status": "unaffected",
                    "version": "7.2.8",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.3-rc4",
                    "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\nIB/IPoIB: Avoid restoring OPER_UP after multicast flush\n\nipoib_ib_dev_flush_light() temporarily clears IPOIB_FLAG_OPER_UP to\nprevent multicast joins while ipoib_mcast_dev_flush() is running, and\nrestores the flag afterwards if it was previously set.\n\nThis restore races with ipoib_ib_dev_down(). If the interface is brought\ndown while the flush is in progress, ipoib_ib_dev_down() clears\nIPOIB_FLAG_OPER_UP, but the flush path may set it again after the device\nhas already gone down.\n\nSince commit 894021a75291 (\"IB/ipoib: Make the carrier_on_task race\naware\"), ipoib_mcast_carrier_on_task() relies on IPOIB_FLAG_OPER_UP\nbeing cleared to terminate its rtnl_trylock() retry loop. If the flag is\nleft set after shutdown, the workqueue retries forever, causing teardown\nto deadlock when ipoib_ndo_uninit() waits in destroy_workqueue() while\nholding RTNL.\n\nInstead of overloading IPOIB_FLAG_OPER_UP to block multicast joins\nduring a light flush, introduce a dedicated IPOIB_FLAG_MCAST_FLUSH flag.\nUse it together with IPOIB_FLAG_OPER_UP to determine whether multicast\njoins are allowed, avoiding the race with device shutdown."
          }
        ],
        "id": "CVE-2026-98347",
        "lastModified": "2026-10-06T09:18:27.773",
        "metrics": {},
        "published": "2026-10-06T09:18:27.773",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/188b334a6db36a8e0bfaaf59bc4020639a0f3aad"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/1b11e4b55b41d9e69a8e8d07622614202e2eaca9"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/1ff3add37c329704ec46181b4ae4f00f9f16ce6f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/326f7d34bd7e64de535566b65c0533b640df5a81"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/5ad925d45f28464a5e043c9620880bb6a030da89"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/9a141d3dc869d18b2eab35e999f4790a9b84e40f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/b72f38929f4b5aa83161fd3b22a7327207e51ec5"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/f973769fb7cb33ba0d4a64b7dcfee0cabaead938"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}

FKIE_CVE-2026-98347

Vulnerability from fkie_nvd - Published: 2026-10-06 09:18 - Updated: 2026-10-06 09:18

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/188b334a6db36a8e0bfaaf59bc4020639a0f3aad
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1b11e4b55b41d9e69a8e8d07622614202e2eaca9
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1ff3add37c329704ec46181b4ae4f00f9f16ce6f
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/326f7d34bd7e64de535566b65c0533b640df5a81
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5ad925d45f28464a5e043c9620880bb6a030da89
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9a141d3dc869d18b2eab35e999f4790a9b84e40f
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b72f38929f4b5aa83161fd3b22a7327207e51ec5
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f973769fb7cb33ba0d4a64b7dcfee0cabaead938

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/ulp/ipoib/ipoib.h",
            "drivers/infiniband/ulp/ipoib/ipoib_ib.c",
            "drivers/infiniband/ulp/ipoib/ipoib_multicast.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f973769fb7cb33ba0d4a64b7dcfee0cabaead938",
              "status": "affected",
              "version": "344bacca8cd811809fc33a249f2738ab757d327f",
              "versionType": "git"
            },
            {
              "lessThan": "b72f38929f4b5aa83161fd3b22a7327207e51ec5",
              "status": "affected",
              "version": "344bacca8cd811809fc33a249f2738ab757d327f",
              "versionType": "git"
            },
            {
              "lessThan": "1b11e4b55b41d9e69a8e8d07622614202e2eaca9",
              "status": "affected",
              "version": "344bacca8cd811809fc33a249f2738ab757d327f",
              "versionType": "git"
            },
            {
              "lessThan": "326f7d34bd7e64de535566b65c0533b640df5a81",
              "status": "affected",
              "version": "344bacca8cd811809fc33a249f2738ab757d327f",
              "versionType": "git"
            },
            {
              "lessThan": "5ad925d45f28464a5e043c9620880bb6a030da89",
              "status": "affected",
              "version": "344bacca8cd811809fc33a249f2738ab757d327f",
              "versionType": "git"
            },
            {
              "lessThan": "188b334a6db36a8e0bfaaf59bc4020639a0f3aad",
              "status": "affected",
              "version": "344bacca8cd811809fc33a249f2738ab757d327f",
              "versionType": "git"
            },
            {
              "lessThan": "1ff3add37c329704ec46181b4ae4f00f9f16ce6f",
              "status": "affected",
              "version": "344bacca8cd811809fc33a249f2738ab757d327f",
              "versionType": "git"
            },
            {
              "lessThan": "9a141d3dc869d18b2eab35e999f4790a9b84e40f",
              "status": "affected",
              "version": "344bacca8cd811809fc33a249f2738ab757d327f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a289c65ca49d2680a3d797e633e57a45573d1df2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b81459c78935e4579a577b2366c5f8878d3c7fee",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8a9d8dc9ce83a90bfbbe69181acc4cf1beff46f5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "dfe809702a11bd7fb91c882fb55620e39ce22109",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "87160fb51bc343793cc8f5f031a87f1a35aecb82",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "749fd55dd210f9676f0d445a6efaaa3bec65174a",
              "versionType": "git"
            },
            {
              "lessThan": "3.3",
              "status": "affected",
              "version": "3.2.84",
              "versionType": "semver"
            },
            {
              "lessThan": "3.11",
              "status": "affected",
              "version": "3.10.105",
              "versionType": "semver"
            },
            {
              "lessThan": "3.13",
              "status": "affected",
              "version": "3.12.65",
              "versionType": "semver"
            },
            {
              "lessThan": "3.17",
              "status": "affected",
              "version": "3.16.39",
              "versionType": "semver"
            },
            {
              "lessThan": "4.5",
              "status": "affected",
              "version": "4.4.24",
              "versionType": "semver"
            },
            {
              "lessThan": "4.8",
              "status": "affected",
              "version": "4.7.7",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/ulp/ipoib/ipoib.h",
            "drivers/infiniband/ulp/ipoib/ipoib_ib.c",
            "drivers/infiniband/ulp/ipoib/ipoib_multicast.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.8"
            },
            {
              "lessThan": "4.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc4",
              "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\nIB/IPoIB: Avoid restoring OPER_UP after multicast flush\n\nipoib_ib_dev_flush_light() temporarily clears IPOIB_FLAG_OPER_UP to\nprevent multicast joins while ipoib_mcast_dev_flush() is running, and\nrestores the flag afterwards if it was previously set.\n\nThis restore races with ipoib_ib_dev_down(). If the interface is brought\ndown while the flush is in progress, ipoib_ib_dev_down() clears\nIPOIB_FLAG_OPER_UP, but the flush path may set it again after the device\nhas already gone down.\n\nSince commit 894021a75291 (\"IB/ipoib: Make the carrier_on_task race\naware\"), ipoib_mcast_carrier_on_task() relies on IPOIB_FLAG_OPER_UP\nbeing cleared to terminate its rtnl_trylock() retry loop. If the flag is\nleft set after shutdown, the workqueue retries forever, causing teardown\nto deadlock when ipoib_ndo_uninit() waits in destroy_workqueue() while\nholding RTNL.\n\nInstead of overloading IPOIB_FLAG_OPER_UP to block multicast joins\nduring a light flush, introduce a dedicated IPOIB_FLAG_MCAST_FLUSH flag.\nUse it together with IPOIB_FLAG_OPER_UP to determine whether multicast\njoins are allowed, avoiding the race with device shutdown."
    }
  ],
  "id": "CVE-2026-98347",
  "lastModified": "2026-10-06T09:18:27.773",
  "metrics": {},
  "published": "2026-10-06T09:18:27.773",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/188b334a6db36a8e0bfaaf59bc4020639a0f3aad"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1b11e4b55b41d9e69a8e8d07622614202e2eaca9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1ff3add37c329704ec46181b4ae4f00f9f16ce6f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/326f7d34bd7e64de535566b65c0533b640df5a81"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5ad925d45f28464a5e043c9620880bb6a030da89"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9a141d3dc869d18b2eab35e999f4790a9b84e40f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b72f38929f4b5aa83161fd3b22a7327207e51ec5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f973769fb7cb33ba0d4a64b7dcfee0cabaead938"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-8J4R-887V-CJJX

Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31

Details

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

IB/IPoIB: Avoid restoring OPER_UP after multicast flush

ipoib_ib_dev_flush_light() temporarily clears IPOIB_FLAG_OPER_UP to prevent multicast joins while ipoib_mcast_dev_flush() is running, and restores the flag afterwards if it was previously set.

This restore races with ipoib_ib_dev_down(). If the interface is brought down while the flush is in progress, ipoib_ib_dev_down() clears IPOIB_FLAG_OPER_UP, but the flush path may set it again after the device has already gone down.

Since commit 894021a75291 ("IB/ipoib: Make the carrier_on_task race aware"), ipoib_mcast_carrier_on_task() relies on IPOIB_FLAG_OPER_UP being cleared to terminate its rtnl_trylock() retry loop. If the flag is left set after shutdown, the workqueue retries forever, causing teardown to deadlock when ipoib_ndo_uninit() waits in destroy_workqueue() while holding RTNL.

Instead of overloading IPOIB_FLAG_OPER_UP to block multicast joins during a light flush, introduce a dedicated IPOIB_FLAG_MCAST_FLUSH flag. Use it together with IPOIB_FLAG_OPER_UP to determine whether multicast joins are allowed, avoiding the race with device shutdown.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-98347"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-06T09:18:27Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nIB/IPoIB: Avoid restoring OPER_UP after multicast flush\n\nipoib_ib_dev_flush_light() temporarily clears IPOIB_FLAG_OPER_UP to\nprevent multicast joins while ipoib_mcast_dev_flush() is running, and\nrestores the flag afterwards if it was previously set.\n\nThis restore races with ipoib_ib_dev_down(). If the interface is brought\ndown while the flush is in progress, ipoib_ib_dev_down() clears\nIPOIB_FLAG_OPER_UP, but the flush path may set it again after the device\nhas already gone down.\n\nSince commit 894021a75291 (\"IB/ipoib: Make the carrier_on_task race\naware\"), ipoib_mcast_carrier_on_task() relies on IPOIB_FLAG_OPER_UP\nbeing cleared to terminate its rtnl_trylock() retry loop. If the flag is\nleft set after shutdown, the workqueue retries forever, causing teardown\nto deadlock when ipoib_ndo_uninit() waits in destroy_workqueue() while\nholding RTNL.\n\nInstead of overloading IPOIB_FLAG_OPER_UP to block multicast joins\nduring a light flush, introduce a dedicated IPOIB_FLAG_MCAST_FLUSH flag.\nUse it together with IPOIB_FLAG_OPER_UP to determine whether multicast\njoins are allowed, avoiding the race with device shutdown.",
  "id": "GHSA-8j4r-887v-cjjx",
  "modified": "2026-10-06T09:31:36Z",
  "published": "2026-10-06T09:31:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98347"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/188b334a6db36a8e0bfaaf59bc4020639a0f3aad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1b11e4b55b41d9e69a8e8d07622614202e2eaca9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1ff3add37c329704ec46181b4ae4f00f9f16ce6f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/326f7d34bd7e64de535566b65c0533b640df5a81"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ad925d45f28464a5e043c9620880bb6a030da89"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9a141d3dc869d18b2eab35e999f4790a9b84e40f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b72f38929f4b5aa83161fd3b22a7327207e51ec5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f973769fb7cb33ba0d4a64b7dcfee0cabaead938"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.

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.

Action not permitted

CVE-2026-98347 (GCVE-0-2026-98347)

FKIE_CVE-2026-98347

GHSA-8J4R-887V-CJJX

Tags

Sightings

Nomenclature

Related by attack behaviour