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CVE-2024-27019 (GCVE-0-2024-27019)

Vulnerability from cvelistv5 – Published: 2024-05-01 05:30 – Updated: 2026-08-05 11:29
VLAI
Title
netfilter: nf_tables: Fix potential data-race in __nft_obj_type_get()
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: Fix potential data-race in __nft_obj_type_get() nft_unregister_obj() can concurrent with __nft_obj_type_get(), and there is not any protection when iterate over nf_tables_objects list in __nft_obj_type_get(). Therefore, there is potential data-race of nf_tables_objects list entry. Use list_for_each_entry_rcu() to iterate over nf_tables_objects list in __nft_obj_type_get(), and use rcu_read_lock() in the caller nft_obj_type_get() to protect the entire type query process.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-17 17:40 UTC
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e50092404c1bc7aaeb0a0f4077fa6f07b073a20f , < cade34279c2249eafe528564bd2e203e4ff15f88 (git)
Affected: e50092404c1bc7aaeb0a0f4077fa6f07b073a20f , < 379bf7257bc5f2a1b1ca8514e08a871b7bf6d920 (git)
Affected: e50092404c1bc7aaeb0a0f4077fa6f07b073a20f , < df7c0fb8c2b9f9cac65659332581b19682a71349 (git)
Affected: e50092404c1bc7aaeb0a0f4077fa6f07b073a20f , < ad333578f736d56920e090d7db1f8dec891d815e (git)
Affected: e50092404c1bc7aaeb0a0f4077fa6f07b073a20f , < 4ca946b19caf655a08d5e2266d4d5526025ebb73 (git)
Affected: e50092404c1bc7aaeb0a0f4077fa6f07b073a20f , < d78d867dcea69c328db30df665be5be7d0148484 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.10
Unaffected: 0 , < 4.10 (semver)
Unaffected: 5.10.219 , ≤ 5.10.* (semver)
Unaffected: 5.15.157 , ≤ 5.15.* (semver)
Unaffected: 6.1.88 , ≤ 6.1.* (semver)
Unaffected: 6.6.29 , ≤ 6.6.* (semver)
Unaffected: 6.8.8 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website

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                  "lessThan": "df7c0fb8c2b9f9cac65659332581b19682a71349",
                  "status": "affected",
                  "version": "e50092404c1bc7aaeb0a0f4077fa6f07b073a20f",
                  "versionType": "git"
                },
                {
                  "lessThan": "ad333578f736d56920e090d7db1f8dec891d815e",
                  "status": "affected",
                  "version": "e50092404c1bc7aaeb0a0f4077fa6f07b073a20f",
                  "versionType": "git"
                },
                {
                  "lessThan": "4ca946b19caf655a08d5e2266d4d5526025ebb73",
                  "status": "affected",
                  "version": "e50092404c1bc7aaeb0a0f4077fa6f07b073a20f",
                  "versionType": "git"
                },
                {
                  "lessThan": "d78d867dcea69c328db30df665be5be7d0148484",
                  "status": "affected",
                  "version": "e50092404c1bc7aaeb0a0f4077fa6f07b073a20f",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "net/netfilter/nf_tables_api.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "4.10"
                },
                {
                  "lessThan": "4.10",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.219",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.157",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.88",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.29",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.8.*",
                  "status": "unaffected",
                  "version": "6.8.8",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.9",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.219",
                      "versionStartIncluding": "4.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.157",
                      "versionStartIncluding": "4.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.88",
                      "versionStartIncluding": "4.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.29",
                      "versionStartIncluding": "4.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.8.8",
                      "versionStartIncluding": "4.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.9",
                      "versionStartIncluding": "4.10",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: Fix potential data-race in __nft_obj_type_get()\n\nnft_unregister_obj() can concurrent with __nft_obj_type_get(),\nand there is not any protection when iterate over nf_tables_objects\nlist in __nft_obj_type_get(). Therefore, there is potential data-race\nof nf_tables_objects list entry.\n\nUse list_for_each_entry_rcu() to iterate over nf_tables_objects\nlist in __nft_obj_type_get(), and use rcu_read_lock() in the caller\nnft_obj_type_get() to protect the entire type query process."
            }
          ],
          "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 vulnerable code is reached only through the nfnetlink/nf_tables netlink socket via an NFT_MSG_NEWOBJ batch message, which requires a local process on the system. There is no remote or adjacent-network path into `__nft_obj_type_get()`.\nAC:L - The attacker fully controls the racing reader side and can issue NFT_MSG_NEWOBJ batches in a tight loop with no rate limiting or retry penalty, and can independently drive the list-mutation side through on-demand module autoload (`nft_request_module()` \u2192 `nf_tables_module_autoload()`, which drops `commit_mutex` around `request_module()`). Nothing about winning the window depends on state the attacker cannot influence or repeatedly re-attempt.\nPR:L - The only gate is `netlink_net_capable(skb, CAP_NET_ADMIN)`, which is evaluated against the network namespace\u0027s owning user namespace, so an ordinary unprivileged user obtains it with `unshare -Urn`. No real root or CAP_SYS_ADMIN in the initial namespace is required to reach the unsynchronized list walk.\nUI:N - The attacker triggers the entire sequence from their own process by sending netlink messages; no victim action, mount, file open, or administrator interaction is needed.\nS:U - The race and its consequences are confined to the kernel\u0027s own security authority \u2014 this is standard in-kernel memory corruption with no crossing of a VM, IOMMU, or hypervisor boundary.\nC:H - The unprotected traversal can dereference `struct nft_object_type` fields in module memory already released by `free_mod_mem()`, and the stale pointer is propagated into `nft_obj_init()` where `type-\u003emaxattr` and `type-\u003epolicy` steer a `kmalloc_array()` and `nla_parse_nested()`, giving an attacker-influenceable read out of reallocated kernel memory.\nI:H - `try_module_get(type-\u003eowner)` performs an atomic increment through a dangling pointer, and `nft_obj_init()` then invokes `type-\u003eselect_ops()` and `ops-\u003einit()` \u2014 indirect calls through function pointers read from freed vmalloc\u0027d module memory that can be reoccupied by a later module load or spray, yielding a control-flow hijack primitive.\nA:H - Following a stale list entry or a garbage `type-\u003eowner`/`select_ops` pointer produces an oops or panic, and the use-after-free reliably crashes the kernel even when not weaponized further."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T11:29:02.381Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/cade34279c2249eafe528564bd2e203e4ff15f88"
            },
            {
              "url": "https://git.kernel.org/stable/c/379bf7257bc5f2a1b1ca8514e08a871b7bf6d920"
            },
            {
              "url": "https://git.kernel.org/stable/c/df7c0fb8c2b9f9cac65659332581b19682a71349"
            },
            {
              "url": "https://git.kernel.org/stable/c/ad333578f736d56920e090d7db1f8dec891d815e"
            },
            {
              "url": "https://git.kernel.org/stable/c/4ca946b19caf655a08d5e2266d4d5526025ebb73"
            },
            {
              "url": "https://git.kernel.org/stable/c/d78d867dcea69c328db30df665be5be7d0148484"
            }
          ],
          "title": "netfilter: nf_tables: Fix potential data-race in __nft_obj_type_get()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-27019",
        "datePublished": "2024-05-01T05:30:11.319Z",
        "dateReserved": "2024-02-19T14:20:24.209Z",
        "dateUpdated": "2026-08-05T11:29:02.381Z",
        "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.

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Detection rules are retrieved from Rulezet.

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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.


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