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CVE-2023-52654 (GCVE-0-2023-52654)

Vulnerability from cvelistv5 – Published: 2024-05-09 16:37 – Updated: 2026-08-05 09:10
VLAI
Title
io_uring/af_unix: disable sending io_uring over sockets
Summary
In the Linux kernel, the following vulnerability has been resolved: io_uring/af_unix: disable sending io_uring over sockets File reference cycles have caused lots of problems for io_uring in the past, and it still doesn't work exactly right and races with unix_stream_read_generic(). The safest fix would be to completely disallow sending io_uring files via sockets via SCM_RIGHT, so there are no possible cycles invloving registered files and thus rendering SCM accounting on the io_uring side unnecessary.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-09 18:37 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 04df9719df1865f6770af9bc7880874af0e594b2 , < 18824f592aad4124d79751bbc1500ea86ac3ff29 (git)
Affected: c378c479c5175833bb22ff71974cda47d7b05401 , < 3fe1ea5f921bf5b71cbfdc4469fb96c05936610e (git)
Affected: 813d8fe5d30388f73a21d3a2bf46b0a1fd72498c , < bcedd497b3b4a0be56f3adf7c7542720eced0792 (git)
Affected: 0091bfc81741b8d3aeb3b7ab8636f911b2de6e80 , < f2f57f51b53be153a522300454ddb3887722fb2c (git)
Affected: 0091bfc81741b8d3aeb3b7ab8636f911b2de6e80 , < 5a33d385eb36991a91e3dddb189d8679e2aac2be (git)
Affected: 0091bfc81741b8d3aeb3b7ab8636f911b2de6e80 , < 705318a99a138c29a512a72c3e0043b3cd7f55f4 (git)
Affected: b4293c01ee0d0ecdd3cb5801e13f62271144667a (git)
Affected: 75e94c7e8859e58aadc15a98cc9704edff47d4f2 (git)
Affected: 5.4.220 , < 5.4.264 (semver)
Affected: 5.10.150 , < 5.10.204 (semver)
Affected: 5.15.75 , < 5.15.143 (semver)
Affected: 5.19.17 , < 5.20 (semver)
Affected: 6.0.3 , < 6.1 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.1
Unaffected: 0 , < 6.1 (semver)
Unaffected: 5.4.264 , ≤ 5.4.* (semver)
Unaffected: 5.10.204 , ≤ 5.10.* (semver)
Unaffected: 5.15.143 , ≤ 5.15.* (semver)
Unaffected: 6.1.68 , ≤ 6.1.* (semver)
Unaffected: 6.6.7 , ≤ 6.6.* (semver)
Unaffected: 6.7 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/af_unix: disable sending io_uring over sockets\n\nFile reference cycles have caused lots of problems for io_uring\nin the past, and it still doesn\u0027t work exactly right and races with\nunix_stream_read_generic(). The safest fix would be to completely\ndisallow sending io_uring files via sockets via SCM_RIGHT, so there\nare no possible cycles invloving registered files and thus rendering\nSCM accounting on the io_uring side unnecessary."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - Triggered via local syscalls only (io_uring_setup, unix socketpair/sendmsg with SCM_RIGHTS, recvmsg); io_uring and AF_UNIX are local IPC paths, not reachable by remote packet processing.\nAC:L - The attacker fully controls both sides of the race\u2014creating the io_uring instance and unix sockets, sending the ring FD via SCM_RIGHTS, triggering unix_gc, and racing concurrent recvmsg\u2014and can retry until the GC vs unix_stream_read_generic window is won.\nPR:L - io_uring_setup is available to ordinary unprivileged users by default (sysctl io_uring_disabled=0), and AF_UNIX socket/SCM_RIGHTS operations require no capabilities.\nUI:N - Exploitation needs only the attacker\u0027s own io_uring and unix-socket operations; no separate victim action is required.\nS:U - This is a standard in-kernel UAF enabling local privilege escalation within the same host kernel authority; it does not cross a VM, IOMMU, or sandbox boundary.\nC:H - Confirmed use-after-free of an SKB (and associated SCM file state) when unix_gc frees a buffer still held by unix_stream_read_generic; UAF of reclaimable heap objects yields an arbitrary kernel read/disclosure primitive.\nI:H - The same SKB UAF is heap-sprayable into write and control-flow hijack primitives, enabling integrity compromise and arbitrary code execution in the kernel (as also assessed for sister CVE-2023-6531).\nA:H - The UAF causes kernel oops/panic when freed SKB memory is accessed during the race, producing a full availability impact even without further exploitation."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T09:10:52.194Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/18824f592aad4124d79751bbc1500ea86ac3ff29"
            },
            {
              "url": "https://git.kernel.org/stable/c/3fe1ea5f921bf5b71cbfdc4469fb96c05936610e"
            },
            {
              "url": "https://git.kernel.org/stable/c/bcedd497b3b4a0be56f3adf7c7542720eced0792"
            },
            {
              "url": "https://git.kernel.org/stable/c/f2f57f51b53be153a522300454ddb3887722fb2c"
            },
            {
              "url": "https://git.kernel.org/stable/c/5a33d385eb36991a91e3dddb189d8679e2aac2be"
            },
            {
              "url": "https://git.kernel.org/stable/c/705318a99a138c29a512a72c3e0043b3cd7f55f4"
            }
          ],
          "title": "io_uring/af_unix: disable sending io_uring over sockets",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2023-52654",
        "datePublished": "2024-05-09T16:37:04.293Z",
        "dateReserved": "2024-03-06T09:52:12.098Z",
        "dateUpdated": "2026-08-05T09:10:52.194Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.

Sightings

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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.
  • 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.


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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.