Vulnerability-Lookup

GHSA-WR36-CVHP-R8Q2

Vulnerability from github – Published: 2026-10-23 15:31 – Updated: 2026-10-23 15:31

Details

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

btrfs: don't stash io_uring encoded data across -EAGAIN

Returning -EAGAIN while leaving btrfs_uring_encoded_data in the cmd PDU leaks if the request is cancelled or the ring exits before reissue. io_uring does not free driver PDU allocations on cleanup.

Write: io_queue_sqe() always issues with IO_URING_F_NONBLOCK first, so return -EAGAIN before allocating and free data on every exit.

Read: free on nowait -EAGAIN too; only -EIOCBQUEUED keeps the allocation for btrfs_uring_read_finished().

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98960"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-23T13:17:17Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: don\u0027t stash io_uring encoded data across -EAGAIN\n\nReturning -EAGAIN while leaving btrfs_uring_encoded_data in the cmd PDU\nleaks if the request is cancelled or the ring exits before reissue.\nio_uring does not free driver PDU allocations on cleanup.\n\nWrite: io_queue_sqe() always issues with IO_URING_F_NONBLOCK first, so\nreturn -EAGAIN before allocating and free data on every exit.\n\nRead: free on nowait -EAGAIN too; only -EIOCBQUEUED keeps the allocation\nfor btrfs_uring_read_finished().",
  "id": "GHSA-wr36-cvhp-r8q2",
  "modified": "2026-10-23T15:31:32Z",
  "published": "2026-10-23T15:31:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98960"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4d9c1e0a7fb2cfb1cc924acafc194d2c15c3e83e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/51562a8cb11628d3a5e105b4c347ec5473e5745f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98960 (GCVE-0-2026-98960)

Vulnerability from cvelistv5 – Published: 2026-10-23 12:19 – Updated: 2026-10-23 12:19

Title

btrfs: don't stash io_uring encoded data across -EAGAIN

Summary

In the Linux kernel, the following vulnerability has been resolved: btrfs: don't stash io_uring encoded data across -EAGAIN Returning -EAGAIN while leaving btrfs_uring_encoded_data in the cmd PDU leaks if the request is cancelled or the ring exits before reissue. io_uring does not free driver PDU allocations on cleanup. Write: io_queue_sqe() always issues with IO_URING_F_NONBLOCK first, so return -EAGAIN before allocating and free data on every exit. Read: free on nowait -EAGAIN too; only -EIOCBQUEUED keeps the allocation for btrfs_uring_read_finished().

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7063 records in the last 180 days details

References

2 references

URL	Tags
https://git.kernel.org/stable/c/4d9c1e0a7fb2cfb1c…
https://git.kernel.org/stable/c/51562a8cb11628d3a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 34310c442e175f286b4c06ab5caa4e0b267ea31c , < 4d9c1e0a7fb2cfb1cc924acafc194d2c15c3e83e (git) Affected: 34310c442e175f286b4c06ab5caa4e0b267ea31c , < 51562a8cb11628d3a5e105b4c347ec5473e5745f (git)
Linux	Linux	Affected: 6.13 Unaffected: 0 , < 6.13 (semver) Unaffected: 7.2.11 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/ioctl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4d9c1e0a7fb2cfb1cc924acafc194d2c15c3e83e",
              "status": "affected",
              "version": "34310c442e175f286b4c06ab5caa4e0b267ea31c",
              "versionType": "git"
            },
            {
              "lessThan": "51562a8cb11628d3a5e105b4c347ec5473e5745f",
              "status": "affected",
              "version": "34310c442e175f286b4c06ab5caa4e0b267ea31c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/ioctl.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.11",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: don\u0027t stash io_uring encoded data across -EAGAIN\n\nReturning -EAGAIN while leaving btrfs_uring_encoded_data in the cmd PDU\nleaks if the request is cancelled or the ring exits before reissue.\nio_uring does not free driver PDU allocations on cleanup.\n\nWrite: io_queue_sqe() always issues with IO_URING_F_NONBLOCK first, so\nreturn -EAGAIN before allocating and free data on every exit.\n\nRead: free on nowait -EAGAIN too; only -EIOCBQUEUED keeps the allocation\nfor btrfs_uring_read_finished()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T12:19:28.651Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "references": [
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        },
        {
          "url": "https://git.kernel.org/stable/c/51562a8cb11628d3a5e105b4c347ec5473e5745f"
        }
      ],
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98960",
    "datePublished": "2026-10-23T12:19:28.651Z",
    "dateReserved": "2026-09-25T10:25:14.382Z",
    "dateUpdated": "2026-10-23T12:19:28.651Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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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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