Vulnerability-Lookup

GHSA-Q8Q5-8HV7-M52R

Vulnerability from github – Published: 2026-01-13 18:31 – Updated: 2026-01-19 15:30

Details

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

RDMA/cm: Fix leaking the multicast GID table reference

If the CM ID is destroyed while the CM event for multicast creating is still queued the cancel_work_sync() will prevent the work from running which also prevents destroying the ah_attr. This leaks a refcount and triggers a WARN:

GID entry ref leak for dev syz1 index 2 ref=573 WARNING: CPU: 1 PID: 655 at drivers/infiniband/core/cache.c:809 release_gid_table drivers/infiniband/core/cache.c:806 [inline] WARNING: CPU: 1 PID: 655 at drivers/infiniband/core/cache.c:809 gid_table_release_one+0x284/0x3cc drivers/infiniband/core/cache.c:886

Destroy the ah_attr after canceling the work, it is safe to call this twice.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-71084"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-13T16:16:08Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cm: Fix leaking the multicast GID table reference\n\nIf the CM ID is destroyed while the CM event for multicast creating is\nstill queued the cancel_work_sync() will prevent the work from running\nwhich also prevents destroying the ah_attr. This leaks a refcount and\ntriggers a WARN:\n\n   GID entry ref leak for dev syz1 index 2 ref=573\n   WARNING: CPU: 1 PID: 655 at drivers/infiniband/core/cache.c:809 release_gid_table drivers/infiniband/core/cache.c:806 [inline]\n   WARNING: CPU: 1 PID: 655 at drivers/infiniband/core/cache.c:809 gid_table_release_one+0x284/0x3cc drivers/infiniband/core/cache.c:886\n\nDestroy the ah_attr after canceling the work, it is safe to call this\ntwice.",
  "id": "GHSA-q8q5-8hv7-m52r",
  "modified": "2026-01-19T15:30:36Z",
  "published": "2026-01-13T18:31:06Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71084"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ba6d01c4b3c584264dc733c6a2ecc5bbc8e0bb5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/57f3cb6c84159d12ba343574df2115fb18dd83ca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5cb34bb5fd726491b809efbeb5cfd63ae5bf9cf3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab668a58c4a2ccb6d54add7a76f2f955d15d0196"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/abf38398724ecc888f62c678d288da40d11878af"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c0acdee513239e1d6e1b490f56be0e6837dfd162"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d5ce588a9552878859a4d44b70b724216c188a5f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-71084 (GCVE-0-2025-71084)

Vulnerability from cvelistv5 – Published: 2026-01-13 15:34 – Updated: 2026-01-19 12:19

Title

RDMA/cm: Fix leaking the multicast GID table reference

Summary

In the Linux kernel, the following vulnerability has been resolved: RDMA/cm: Fix leaking the multicast GID table reference If the CM ID is destroyed while the CM event for multicast creating is still queued the cancel_work_sync() will prevent the work from running which also prevents destroying the ah_attr. This leaks a refcount and triggers a WARN: GID entry ref leak for dev syz1 index 2 ref=573 WARNING: CPU: 1 PID: 655 at drivers/infiniband/core/cache.c:809 release_gid_table drivers/infiniband/core/cache.c:806 [inline] WARNING: CPU: 1 PID: 655 at drivers/infiniband/core/cache.c:809 gid_table_release_one+0x284/0x3cc drivers/infiniband/core/cache.c:886 Destroy the ah_attr after canceling the work, it is safe to call this twice.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/d5ce588a955287885…
	https://git.kernel.org/stable/c/abf38398724ecc888…
	https://git.kernel.org/stable/c/ab668a58c4a2ccb6d…
	https://git.kernel.org/stable/c/c0acdee513239e1d6…
	https://git.kernel.org/stable/c/5cb34bb5fd726491b…
	https://git.kernel.org/stable/c/3ba6d01c4b3c58426…
	https://git.kernel.org/stable/c/57f3cb6c84159d12b…

Impacted products

Vendor

Product

Version

Linux

Affected: 60d613b39e8d0c9f3b526e9c96445422b4562d76 , < d5ce588a9552878859a4d44b70b724216c188a5f (git)
Affected: fe454dc31e84f8c14cb8942fcb61666c9f40745b , < abf38398724ecc888f62c678d288da40d11878af (git)
Affected: fe454dc31e84f8c14cb8942fcb61666c9f40745b , < ab668a58c4a2ccb6d54add7a76f2f955d15d0196 (git)
Affected: fe454dc31e84f8c14cb8942fcb61666c9f40745b , < c0acdee513239e1d6e1b490f56be0e6837dfd162 (git)
Affected: fe454dc31e84f8c14cb8942fcb61666c9f40745b , < 5cb34bb5fd726491b809efbeb5cfd63ae5bf9cf3 (git)
Affected: fe454dc31e84f8c14cb8942fcb61666c9f40745b , < 3ba6d01c4b3c584264dc733c6a2ecc5bbc8e0bb5 (git)
Affected: fe454dc31e84f8c14cb8942fcb61666c9f40745b , < 57f3cb6c84159d12ba343574df2115fb18dd83ca (git)
Affected: a3262b3884dd67b4c5632ce7cdf9cff9d1a575d4 (git)

Linux

Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.10.248 , ≤ 5.10.* (semver)
Unaffected: 5.15.198 , ≤ 5.15.* (semver)
Unaffected: 6.1.160 , ≤ 6.1.* (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.18.4 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc4 , ≤ * (original_commit_for_fix)

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{
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          "programFiles": [
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.15.198",
              "versionType": "semver"
            },
            {
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              "versionType": "semver"
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              "status": "unaffected",
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              "versionType": "semver"
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.64",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.18.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc4",
              "versionType": "original_commit_for_fix"
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      "title": "RDMA/cm: Fix leaking the multicast GID table reference",
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    "cveId": "CVE-2025-71084",
    "datePublished": "2026-01-13T15:34:47.665Z",
    "dateReserved": "2026-01-13T15:30:19.649Z",
    "dateUpdated": "2026-01-19T12:19:47.115Z",
    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-Q8Q5-8HV7-M52R

CVE-2025-71084 (GCVE-0-2025-71084)

Tags

Sightings

Nomenclature