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EUVD-2026-375783

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 08:39

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T08:39:58.621019+00:00",
  "id": "EUVD-2026-375783"
}

CVE-2026-98072 (GCVE-0-2026-98072)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:24 – Updated: 2026-10-03 11:02

Title

net/rds: use wq_has_sleeper() in release_in_xmit()

Summary

In the Linux kernel, the following vulnerability has been resolved: net/rds: use wq_has_sleeper() in release_in_xmit() release_in_xmit() clears RDS_IN_XMIT with clear_bit_unlock() and then checks waitqueue_active() to decide whether anyone needs waking. clear_bit_unlock() is only a release operation: it orders the critical section before the bit clear, but does not order the subsequent plain load of the wait queue head after it. The waiter side does the mirror image - it adds itself to the wait queue and then tests the bit. That is the classic store-buffering pattern: the releasing CPU can read the wait queue as empty while the waiting CPU still reads the bit as set, so the sleeper is never woken. The waiters are rds_conn_shutdown() and rds_tcp_reset_callbacks(), both in uninterruptible wait_event() with no timeout. A lost wake-up strands the shutdown worker on its single-threaded workqueue until some other sender releases the bit again - and on a connection that is being torn down precisely because it failed, there may never be another sender. The barrier used to be there: release_in_xmit() did clear_bit() followed by smp_mb__after_atomic() until commit 1422f28826d2 ("rds: introduce acquire/release ordering in acquire/release_in_xmit()") folded both into clear_bit_unlock(), which strengthened the lock hand-off but silently dropped the full barrier the wake-up check depends on. The refill counterpart, release_refill() in net/rds/ib_recv.c, still carries its smp_mb__after_atomic() for exactly this reason. Use wq_has_sleeper(), which is waitqueue_active() preceded by the required full barrier.

Severity

No CVSS data available.

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/6f552364d97cf4005…
https://git.kernel.org/stable/c/a94b1dfc82454c5bc…
https://git.kernel.org/stable/c/5a806ed1eb46850ca…
https://git.kernel.org/stable/c/3d401934b7edb3ccb…
https://git.kernel.org/stable/c/ed7ee0cd0e136d02f…
https://git.kernel.org/stable/c/a269795107f45adc9…
https://git.kernel.org/stable/c/3764627b30a283e61…
https://git.kernel.org/stable/c/6d0c8b70739130114…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1e1e4316fcaeb9cd6bc56c91127e88625237dd44 , < 6f552364d97cf4005c7a58f11c9f79e14e269865 (git) Affected: 8c378cc522aedd5fa5aa53486b43a4d552fbbd5c , < a94b1dfc82454c5bc068e71c25393af674daf63b (git) Affected: 52287ed416a10bc3d3e204a3186d9509ab3ee634 , < 5a806ed1eb46850ca4159a18b2a8c4b70f0c1341 (git) Affected: 4a4dffdff9ea6201665f5d0a5042011d09bd527f , < 3d401934b7edb3ccb07d982dabadd04c45ee307c (git) Affected: 1422f28826d2a0c11e5240b3e951c9e214d8656e , < ed7ee0cd0e136d02f87f13181b1a89880463c7e9 (git) Affected: 1422f28826d2a0c11e5240b3e951c9e214d8656e , < a269795107f45adc95975a83324f8fef40bec4ce (git) Affected: 1422f28826d2a0c11e5240b3e951c9e214d8656e , < 3764627b30a283e611e652c4a2bb8cdc74a75a99 (git) Affected: 1422f28826d2a0c11e5240b3e951c9e214d8656e , < 6d0c8b7073913011459cf968cbbadd341e166bc3 (git) Affected: bec6c4ce1169a565c58c347d5d0ac22e46d507d6 (git) Affected: f781fb5177cdfd9a6c98cd94e30275457c6461ac (git) Affected: 917135195200e20e5244b9c3f2bb40f3d5e02510 (git) Affected: d792459a6e2ae21c7f5107babd63e52e4c5ab93a (git) Affected: 5.10.214 , < 5.10.271 (semver) Affected: 5.15.153 , < 5.15.222 (semver) Affected: 6.1.83 , < 6.1.189 (semver) Affected: 6.6.23 , < 6.6.158 (semver) Affected: 4.19.311 , < 4.20 (semver) Affected: 5.4.273 , < 5.5 (semver) Affected: 6.7.11 , < 6.8 (semver) Affected: 6.8.2 , < 6.9 (semver)
Linux	Linux	Affected: 6.9 Unaffected: 0 , < 6.9 (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: 6.12.111 , ≤ 6.12.* (semver) Unaffected: 6.18.53 , ≤ 6.18.* (semver) Unaffected: 7.2.7 , ≤ 7.2.* (semver) Unaffected: 7.3-rc2 , ≤ * (original_commit_for_fix)

Show details on NVD website

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/rds/send.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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              "versionType": "git"
            },
            {
              "lessThan": "5a806ed1eb46850ca4159a18b2a8c4b70f0c1341",
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              "versionType": "git"
            },
            {
              "lessThan": "3d401934b7edb3ccb07d982dabadd04c45ee307c",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "ed7ee0cd0e136d02f87f13181b1a89880463c7e9",
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              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
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              "versionType": "git"
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              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f781fb5177cdfd9a6c98cd94e30275457c6461ac",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "917135195200e20e5244b9c3f2bb40f3d5e02510",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d792459a6e2ae21c7f5107babd63e52e4c5ab93a",
              "versionType": "git"
            },
            {
              "lessThan": "5.10.271",
              "status": "affected",
              "version": "5.10.214",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.222",
              "status": "affected",
              "version": "5.15.153",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.189",
              "status": "affected",
              "version": "6.1.83",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.158",
              "status": "affected",
              "version": "6.6.23",
              "versionType": "semver"
            },
            {
              "lessThan": "4.20",
              "status": "affected",
              "version": "4.19.311",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.273",
              "versionType": "semver"
            },
            {
              "lessThan": "6.8",
              "status": "affected",
              "version": "6.7.11",
              "versionType": "semver"
            },
            {
              "lessThan": "6.9",
              "status": "affected",
              "version": "6.8.2",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/rds/send.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "lessThan": "6.9",
              "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": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "versionEndExcluding": "5.10.271",
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: use wq_has_sleeper() in release_in_xmit()\n\nrelease_in_xmit() clears RDS_IN_XMIT with clear_bit_unlock() and then\nchecks waitqueue_active() to decide whether anyone needs waking.\nclear_bit_unlock() is only a release operation: it orders the\ncritical section before the bit clear, but does not order the\nsubsequent plain load of the wait queue head after it.  The waiter\nside does the mirror image - it adds itself to the wait queue and\nthen tests the bit.  That is the classic store-buffering pattern: the\nreleasing CPU can read the wait queue as empty while the waiting CPU\nstill reads the bit as set, so the sleeper is never woken.\n\nThe waiters are rds_conn_shutdown() and rds_tcp_reset_callbacks(),\nboth in uninterruptible wait_event() with no timeout.  A lost wake-up\nstrands the shutdown worker on its single-threaded workqueue until\nsome other sender releases the bit again - and on a connection that\nis being torn down precisely because it failed, there may never be\nanother sender.\n\nThe barrier used to be there: release_in_xmit() did clear_bit()\nfollowed by smp_mb__after_atomic() until commit 1422f28826d2 (\"rds:\nintroduce acquire/release ordering in acquire/release_in_xmit()\")\nfolded both into clear_bit_unlock(), which strengthened the lock\nhand-off but silently dropped the full barrier the wake-up check\ndepends on.  The refill counterpart, release_refill() in\nnet/rds/ib_recv.c, still carries its smp_mb__after_atomic() for\nexactly this reason.\n\nUse wq_has_sleeper(), which is waitqueue_active() preceded by the\nrequired full barrier."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-03T11:02:02.710Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6f552364d97cf4005c7a58f11c9f79e14e269865"
        },
        {
          "url": "https://git.kernel.org/stable/c/a94b1dfc82454c5bc068e71c25393af674daf63b"
        },
        {
          "url": "https://git.kernel.org/stable/c/5a806ed1eb46850ca4159a18b2a8c4b70f0c1341"
        },
        {
          "url": "https://git.kernel.org/stable/c/3d401934b7edb3ccb07d982dabadd04c45ee307c"
        },
        {
          "url": "https://git.kernel.org/stable/c/ed7ee0cd0e136d02f87f13181b1a89880463c7e9"
        },
        {
          "url": "https://git.kernel.org/stable/c/a269795107f45adc95975a83324f8fef40bec4ce"
        },
        {
          "url": "https://git.kernel.org/stable/c/3764627b30a283e611e652c4a2bb8cdc74a75a99"
        },
        {
          "url": "https://git.kernel.org/stable/c/6d0c8b7073913011459cf968cbbadd341e166bc3"
        }
      ],
      "title": "net/rds: use wq_has_sleeper() in release_in_xmit()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98072",
    "datePublished": "2026-09-25T10:24:12.675Z",
    "dateReserved": "2026-09-25T10:19:56.074Z",
    "dateUpdated": "2026-10-03T11:02:02.710Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.
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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.
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EUVD-2026-375783

CVE-2026-98072 (GCVE-0-2026-98072)

Tags

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Nomenclature

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