Vulnerability-Lookup

GHSA-99R2-MP2R-Q25R

Vulnerability from github – Published: 2025-06-18 12:30 – Updated: 2025-11-13 18:31

Details

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

ceph: don't leak snap_rwsem in handle_cap_grant

When handle_cap_grant is called on an IMPORT op, then the snap_rwsem is held and the function is expected to release it before returning. It currently fails to do that in all cases which could lead to a deadlock.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50059"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:34Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nceph: don\u0027t leak snap_rwsem in handle_cap_grant\n\nWhen handle_cap_grant is called on an IMPORT op, then the snap_rwsem is\nheld and the function is expected to release it before returning. It\ncurrently fails to do that in all cases which could lead to a deadlock.",
  "id": "GHSA-99r2-mp2r-q25r",
  "modified": "2025-11-13T18:31:00Z",
  "published": "2025-06-18T12:30:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50059"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/58dd4385577ed7969b80cdc9e2a31575aba6c712"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a090cc69699ec2d11b5e34cee8c61f0d4b0068cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aee18421bda6bf12a7cba6a3d7751c0e1cfd0094"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f546faa216d0f53a42ca73ba1fd8c48765b22d77"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-50059 (GCVE-0-2022-50059)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:02 – Updated: 2026-10-15 21:31

Title

ceph: don't leak snap_rwsem in handle_cap_grant

Summary

In the Linux kernel, the following vulnerability has been resolved: ceph: don't leak snap_rwsem in handle_cap_grant When handle_cap_grant is called on an IMPORT op, then the snap_rwsem is held and the function is expected to release it before returning. It currently fails to do that in all cases which could lead to a deadlock.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-15 21:30 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7056 records in the last 180 days details

References

4 references

URL	Tags
https://git.kernel.org/stable/c/aee18421bda6bf12a…
https://git.kernel.org/stable/c/f546faa216d0f53a4…
https://git.kernel.org/stable/c/a090cc69699ec2d11…
https://git.kernel.org/stable/c/58dd4385577ed7969…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6f05b30ea063a2a05dda47a4105a69267ae5270f , < aee18421bda6bf12a7cba6a3d7751c0e1cfd0094 (git) Affected: 6f05b30ea063a2a05dda47a4105a69267ae5270f , < f546faa216d0f53a42ca73ba1fd8c48765b22d77 (git) Affected: 6f05b30ea063a2a05dda47a4105a69267ae5270f , < a090cc69699ec2d11b5e34cee8c61f0d4b0068cb (git) Affected: 6f05b30ea063a2a05dda47a4105a69267ae5270f , < 58dd4385577ed7969b80cdc9e2a31575aba6c712 (git)
Linux	Linux	Affected: 5.8 Unaffected: 0 , < 5.8 (semver) Unaffected: 5.10.138 , ≤ 5.10.* (semver) Unaffected: 5.15.63 , ≤ 5.15.* (semver) Unaffected: 5.19.4 , ≤ 5.19.* (semver) Unaffected: 6.0 , ≤ * (original_commit_for_fix)

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                "id": "CVE-2022-50059",
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                "timestamp": "2026-10-15T21:30:09.490540Z",
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              "status": "unaffected",
              "version": "5.10.138",
              "versionType": "semver"
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              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.63",
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            },
            {
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              "lang": "en",
              "value": "AV:N - The bug is reached while processing CEPH_MSG_CLIENT_CAPS IMPORT messages from a remote Ceph MDS over the TCP messenger into ceph_handle_caps()\u2192handle_cap_grant(); a malicious, compromised, or on-path MDS triggers it purely with network traffic.\nAC:L - A malicious MDS fully controls IMPORT content and migrate-seq values, and can force the i_auth_cap!=cap state that skips up_read(\u0026snap_rwsem); the condition is attacker-driven and reliably repeatable with no uncontrolled race or layout dependency.\nPR:N - Exploitation requires no privileges on the victim client\u2014the attacking MDS peer needs no local account or capability, matching other CephFS client MDS-message bugs scored PR:N.\nUI:N - With CephFS already mounted (normal deployment state), the MDS can unilaterally emit cap IMPORT messages during migration/reconnect without any further victim action at exploit time.\nS:U - The leaked snap_rwsem and resulting hang stay inside the client kernel/CephFS mount authority; there is no VM escape, IOMMU bypass, or other cross-boundary effect.\nC:N - The defect is a missing up_read on snap_rwsem that only deadlocks waiters; it does not corrupt memory, disclose kernel contents, or provide a read primitive.\nI:N - There is no write primitive, type confusion, or other integrity-affecting corruption\u2014only a lock leak that blocks subsequent snap_rwsem writers with no attacker-controlled data modification.\nA:H - Leaking the snap_rwsem read lock causes subsequent down_write paths (snap updates, IMPORT with snaptrace, realm work) and CephFS operations to hang indefinitely, a full denial of service requiring reboot."
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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.

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