Vulnerability-Lookup

GHSA-F247-6X59-Q3CW

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-10 15:33

Details

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

rxrpc: fix io_thread race in rxrpc_wake_up_io_thread()

rxrpc_wake_up_io_thread() checks local->io_thread before waking it, but then reloads the pointer for wake_up_process().

local->io_thread is cleared with WRITE_ONCE() when the I/O thread exits, so the second load can see NULL even if the first load did not.

Take a READ_ONCE() snapshot and use it for both the NULL check and the wake_up_process() call, as rxrpc_encap_rcv() already does.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-68334"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:20:23Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: fix io_thread race in rxrpc_wake_up_io_thread()\n\nrxrpc_wake_up_io_thread() checks local-\u003eio_thread before waking it, but\nthen reloads the pointer for wake_up_process().\n\nlocal-\u003eio_thread is cleared with WRITE_ONCE() when the I/O thread exits, so\nthe second load can see NULL even if the first load did not.\n\nTake a READ_ONCE() snapshot and use it for both the NULL check and the\nwake_up_process() call, as rxrpc_encap_rcv() already does.",
  "id": "GHSA-f247-6x59-q3cw",
  "modified": "2026-08-10T15:33:46Z",
  "published": "2026-08-10T15:33:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68334"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/092b42cf3f6013eec43607ecbcad674723649514"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/745fb794c3e933c023af9dbb5876a5e16ad2dc71"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c9165e199f56997f2f2deb5d3ec2dfab98dfa288"
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  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-68334 (GCVE-0-2026-68334)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:03 – Updated: 2026-08-17 05:03

Title

rxrpc: fix io_thread race in rxrpc_wake_up_io_thread()

Summary

In the Linux kernel, the following vulnerability has been resolved: rxrpc: fix io_thread race in rxrpc_wake_up_io_thread() rxrpc_wake_up_io_thread() checks local->io_thread before waking it, but then reloads the pointer for wake_up_process(). local->io_thread is cleared with WRITE_ONCE() when the I/O thread exits, so the second load can see NULL even if the first load did not. Take a READ_ONCE() snapshot and use it for both the NULL check and the wake_up_process() call, as rxrpc_encap_rcv() already does.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/c9165e199f56997f2…
https://git.kernel.org/stable/c/092b42cf3f6013eec…
https://git.kernel.org/stable/c/745fb794c3e933c02…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5800b1cf3fd8ccab752a101865be1e76dac33142 , < c9165e199f56997f2f2deb5d3ec2dfab98dfa288 (git) Affected: 5800b1cf3fd8ccab752a101865be1e76dac33142 , < 092b42cf3f6013eec43607ecbcad674723649514 (git) Affected: 5800b1cf3fd8ccab752a101865be1e76dac33142 , < 745fb794c3e933c023af9dbb5876a5e16ad2dc71 (git)
Linux	Linux	Affected: 6.16 Unaffected: 0 , < 6.16 (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/rxrpc/ar-internal.h"
          ],
          "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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              "version": "5800b1cf3fd8ccab752a101865be1e76dac33142",
              "versionType": "git"
            },
            {
              "lessThan": "745fb794c3e933c023af9dbb5876a5e16ad2dc71",
              "status": "affected",
              "version": "5800b1cf3fd8ccab752a101865be1e76dac33142",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/rxrpc/ar-internal.h"
          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            },
            {
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              "version": "7.1.6",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.16",
                  "vulnerable": true
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                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: fix io_thread race in rxrpc_wake_up_io_thread()\n\nrxrpc_wake_up_io_thread() checks local-\u003eio_thread before waking it, but\nthen reloads the pointer for wake_up_process().\n\nlocal-\u003eio_thread is cleared with WRITE_ONCE() when the I/O thread exits, so\nthe second load can see NULL even if the first load did not.\n\nTake a READ_ONCE() snapshot and use it for both the NULL check and the\nwake_up_process() call, as rxrpc_encap_rcv() already does."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:03:33.108Z",
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        },
        {
          "url": "https://git.kernel.org/stable/c/745fb794c3e933c023af9dbb5876a5e16ad2dc71"
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      ],
      "title": "rxrpc: fix io_thread race in rxrpc_wake_up_io_thread()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68334",
    "datePublished": "2026-08-10T12:03:10.538Z",
    "dateReserved": "2026-07-30T09:28:09.383Z",
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}

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.

Action not permitted

GHSA-F247-6X59-Q3CW

CVE-2026-68334 (GCVE-0-2026-68334)

Tags

Sightings

Nomenclature