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CVE-2023-52620 (GCVE-0-2023-52620)

Vulnerability from cvelistv5 – Published: 2024-03-21 10:43 – Updated: 2026-08-05 09:10
VLAI
Title
netfilter: nf_tables: disallow timeout for anonymous sets
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: disallow timeout for anonymous sets Never used from userspace, disallow these parameters.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
2.5 (Low)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-26 20:33 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 761da2935d6e18d178582dbdf315a3a458555505 , < 116b0e8e4673a5faa8a739a19b467010c4d3058c (git)
Affected: 761da2935d6e18d178582dbdf315a3a458555505 , < 49ce99ae43314d887153e07cec8bb6a647a19268 (git)
Affected: 761da2935d6e18d178582dbdf315a3a458555505 , < 6f3ae02bbb62f151b19162d5fdc9fe3d48450323 (git)
Affected: 761da2935d6e18d178582dbdf315a3a458555505 , < 00b19ee0dcc1aef06294471ab489bae26d94524e (git)
Affected: 761da2935d6e18d178582dbdf315a3a458555505 , < b7be6c737a179a76901c872f6b4c1d00552d9a1b (git)
Affected: 761da2935d6e18d178582dbdf315a3a458555505 , < e26d3009efda338f19016df4175f354a9bd0a4ab (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.1
Unaffected: 0 , < 4.1 (semver)
Unaffected: 4.19.312 , ≤ 4.19.* (semver)
Unaffected: 5.4.274 , ≤ 5.4.* (semver)
Unaffected: 5.10.215 , ≤ 5.10.* (semver)
Unaffected: 5.15.151 , ≤ 5.15.* (semver)
Unaffected: 6.1.81 , ≤ 6.1.* (semver)
Unaffected: 6.4 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.4.274",
                      "versionStartIncluding": "4.1",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.215",
                      "versionStartIncluding": "4.1",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.151",
                      "versionStartIncluding": "4.1",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.81",
                      "versionStartIncluding": "4.1",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.4",
                      "versionStartIncluding": "4.1",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: disallow timeout for anonymous sets\n\nNever used from userspace, disallow these parameters."
            }
          ],
          "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 - The bug is triggered via the nfnetlink/nf_tables control plane (NFT_MSG_NEWSET with timeout attributes on an anonymous set, then rule delete), which requires a local netlink socket; nftables netlink is a Local attack vector.\nAC:L - The attacker fully controls both sides of the race by setting NFTA_SET_TIMEOUT/NFTA_SET_GC_INTERVAL (driving async rhash/pipapo GC frequency and element expiry) and issuing the unbind/delete transaction, and can retry indefinitely until the GC batch races with set teardown.\nPR:L - nfnetlink_rcv() only requires CAP_NET_ADMIN in the network namespace\u2019s user_ns via netlink_net_capable(), which an unprivileged user obtains with unshare -Urn; nftables is fully functional per-netns.\nUI:N - Creating the anonymous timeout set, populating expiring elements, and deleting the binding rule are all performed by the attacker\u2019s own process with no victim action.\nS:U - The resulting use-after-free corrupts kernel heap state within the same kernel security authority; this is standard local privilege escalation with no VM/IOMMU/sandbox boundary crossed.\nC:H - The GC-vs-destroy race yields a use-after-free on nft_rhash_elem/set objects whose size and contents the attacker chooses, enabling heap spray and arbitrary kernel memory disclosure; per guidance any UAF is Confidentiality High.\nI:H - Concurrent GC removal and set destroy produce UAF/double-free of attacker-sized slab objects\u2014the same nftables heap-corruption primitive class used for local privilege escalation (as in related CVE-2024-26642/26643)\u2014so Integrity is High.\nA:H - Even without successful exploitation, the UAF/double-free on set elements and the destroyed rhashtable causes slab corruption and kernel oops/panic, and the attacker can trigger it repeatedly."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T09:10:45.446Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/116b0e8e4673a5faa8a739a19b467010c4d3058c"
            },
            {
              "url": "https://git.kernel.org/stable/c/49ce99ae43314d887153e07cec8bb6a647a19268"
            },
            {
              "url": "https://git.kernel.org/stable/c/6f3ae02bbb62f151b19162d5fdc9fe3d48450323"
            },
            {
              "url": "https://git.kernel.org/stable/c/00b19ee0dcc1aef06294471ab489bae26d94524e"
            },
            {
              "url": "https://git.kernel.org/stable/c/b7be6c737a179a76901c872f6b4c1d00552d9a1b"
            },
            {
              "url": "https://git.kernel.org/stable/c/e26d3009efda338f19016df4175f354a9bd0a4ab"
            }
          ],
          "title": "netfilter: nf_tables: disallow timeout for anonymous sets",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2023-52620",
        "datePublished": "2024-03-21T10:43:42.854Z",
        "dateReserved": "2024-03-06T09:52:12.090Z",
        "dateUpdated": "2026-08-05T09:10:45.446Z",
        "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

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.


Related by attack behaviour

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.