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

Vulnerability from cvelistv5 – Published: 2026-08-10 12:03 – Updated: 2026-08-17 05:03
VLAI
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
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5800b1cf3fd8ccab752a101865be1e76dac33142 , < c9165e199f56997f2f2deb5d3ec2dfab98dfa288 (git)
Affected: 5800b1cf3fd8ccab752a101865be1e76dac33142 , < 092b42cf3f6013eec43607ecbcad674723649514 (git)
Affected: 5800b1cf3fd8ccab752a101865be1e76dac33142 , < 745fb794c3e933c023af9dbb5876a5e16ad2dc71 (git)
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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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{
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          "programFiles": [
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                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
            }
          ]
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      ],
      "descriptions": [
        {
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          "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",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68334",
    "datePublished": "2026-08-10T12:03:10.538Z",
    "dateReserved": "2026-07-30T09:28:09.383Z",
    "dateUpdated": "2026-08-17T05:03:33.108Z",
    "state": "PUBLISHED"
  },
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    "redhat_vex": {
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      "cve": "CVE-2026-68334",
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      "product_status:known_not_affected": "33",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: `rxrpc` race condition causes Denial of Service",
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      "cve": "CVE-2026-68334",
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      "product_status:known_not_affected": "296",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68334",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68334.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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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.
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  • 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.


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