CVE-2024-26925 (GCVE-0-2024-26925)

Vulnerability from cvelistv5 – Published: 2024-04-24 21:49 – Updated: 2026-08-05 11:28
VLAI
Title
netfilter: nf_tables: release mutex after nft_gc_seq_end from abort path
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: release mutex after nft_gc_seq_end from abort path The commit mutex should not be released during the critical section between nft_gc_seq_begin() and nft_gc_seq_end(), otherwise, async GC worker could collect expired objects and get the released commit lock within the same GC sequence. nf_tables_module_autoload() temporarily releases the mutex to load module dependencies, then it goes back to replay the transaction again. Move it at the end of the abort phase after nft_gc_seq_end() is called.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 15:46 UTC
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4b6346dc1edfb9839d6edee7360ed31a22fa6c95 , < 61ac7284346c32f9a8c8ceac56102f7914060428 (git)
Affected: 23292bdfda5f04e704a843b8f97b0eb95ace1ca6 , < 2cee2ff7f8cce12a63a0a23ffe27f08d99541494 (git)
Affected: b44a459c6561595ed7c3679599c5279204132b33 , < eb769ff4e281f751adcaf4f4445cbf30817be139 (git)
Affected: 5d319f7a81431c6bb32eb4dc7d7975f99e2c8c66 , < 8d3a58af50e46167b6f1db47adadad03c0045dae (git)
Affected: 720344340fb9be2765bbaab7b292ece0a4570eae , < 8038ee3c3e5b59bcd78467686db5270c68544e30 (git)
Affected: 720344340fb9be2765bbaab7b292ece0a4570eae , < a34ba4bdeec0c3b629160497594908dc820110f1 (git)
Affected: 720344340fb9be2765bbaab7b292ece0a4570eae , < 0d459e2ffb541841714839e8228b845458ed3b27 (git)
Affected: f85ca36090cbb252bcbc95fc74c2853fc792694f (git)
Affected: e07e68823116563bdbc49cef185cda6f463bc534 (git)
Affected: 5.4.262 , < 5.4.274 (semver)
Affected: 5.10.198 , < 5.10.215 (semver)
Affected: 5.15.134 , < 5.15.155 (semver)
Affected: 6.1.56 , < 6.1.86 (semver)
Affected: 4.19.316 , < 4.20 (semver)
Affected: 6.4.13 , < 6.5 (semver)
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Linux Linux Affected: 6.5
Unaffected: 0 , < 6.5 (semver)
Unaffected: 5.4.274 , ≤ 5.4.* (semver)
Unaffected: 5.10.215 , ≤ 5.10.* (semver)
Unaffected: 5.15.155 , ≤ 5.15.* (semver)
Unaffected: 6.1.86 , ≤ 6.1.* (semver)
Unaffected: 6.6.26 , ≤ 6.6.* (semver)
Unaffected: 6.8.5 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
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Siemens RUGGEDCOM RM1224 LTE(4G) EU Affected: 0 , < V8.2 (custom)
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Siemens RUGGEDCOM RM1224 LTE(4G) NAM Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE M804PB Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE M812-1 ADSL-Router Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE M816-1 ADSL-Router Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE M826-2 SHDSL-Router Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE M874-2 Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE M874-3 Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE M874-3 3G-Router (CN) Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE M876-3 Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE M876-3 (ROK) Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE M876-4 Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE M876-4 (EU) Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE M876-4 (NAM) Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE MUM853-1 (A1) Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE MUM853-1 (B1) Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE MUM853-1 (EU) Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE MUM856-1 (A1) Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE MUM856-1 (B1) Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE MUM856-1 (CN) Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE MUM856-1 (EU) Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE MUM856-1 (RoW) Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE S615 EEC LAN-Router Affected: 0 , < V8.2 (custom)
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Siemens SCALANCE S615 LAN-Router Affected: 0 , < V8.2 (custom)
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Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
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Show details on NVD website

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      "descriptions": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: release mutex after nft_gc_seq_end from abort path\n\nThe commit mutex should not be released during the critical section\nbetween nft_gc_seq_begin() and nft_gc_seq_end(), otherwise, async GC\nworker could collect expired objects and get the released commit lock\nwithin the same GC sequence.\n\nnf_tables_module_autoload() temporarily releases the mutex to load\nmodule dependencies, then it goes back to replay the transaction again.\nMove it at the end of the abort phase after nft_gc_seq_end() is called."
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            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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              "value": "AV:L - The vulnerability is reached through the nfnetlink/nf_tables netlink socket interface (`NFNL_SUBSYS_NFTABLES` batch processing), which requires a local process on the system. No remote packet path reaches the abort/GC transaction code.\nAC:L - The attacker controls both sides of the race: they choose when to force the `NFNL_ABORT_AUTOLOAD` path (by referencing an unloaded expression module), can queue many `request_module()` requests to stretch the mutex-released window to milliseconds of usermode-helper execution, and schedule the async GC worker precisely via attacker-settable `NFTA_SET_GC_INTERVAL` and element timeouts.\nPR:L - `nfnetlink_rcv()` checks `netlink_net_capable(skb, CAP_NET_ADMIN)`, evaluated against the network namespace\u0027s owning user namespace, so an entirely unprivileged user obtains it with `unshare -Urn` on default Ubuntu/Debian/Fedora/Arch/Android configurations. Only basic local user access is needed.\nUI:N - The attacker drives the entire sequence from its own process by submitting nftables batches and configuring set timeouts; no action by any other user or administrator is required.\nS:U - The corruption is confined to kernel heap memory and results in privilege escalation within the same host security authority, with no crossing of a VM, IOMMU, or hypervisor boundary.\nC:H - The GC worker reads and dereferences already-freed `nft_set_ext` elements (`nft_setelem_data_deactivate`, backend `remove`), and the double free of an attacker-size-controlled slab object allows reclaiming it with a readable structure to disclose arbitrary kernel memory.\nI:H - The double free plus UAF write into the rhashtable/rbtree/pipapo backend gives a general slab-corruption primitive on attacker-sized allocations \u2014 the same class of nftables element double-free that has yielded reliable arbitrary-write root escalation (CVE-2024-1086, CVE-2023-32233).\nA:H - Even unweaponized, the use-after-free and double free trigger slab/list corruption, `BUG_ON`, and kernel panic, and the attacker can repeat the trigger at will to reliably crash the machine."
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    "cveId": "CVE-2024-26925",
    "datePublished": "2024-04-24T21:49:23.251Z",
    "dateReserved": "2024-02-19T14:20:24.194Z",
    "dateUpdated": "2026-08-05T11:28:23.459Z",
    "state": "PUBLISHED"
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      "date": "2026-09-24",
      "epss": "0.00267",
      "percentile": "0.16747"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: release mutex after nft_gc_seq_end from abort path\n\nThe commit mutex should not be released during the critical section\nbetween nft_gc_seq_begin() and nft_gc_seq_end(), otherwise, async GC\nworker could collect expired objects and get the released commit lock\nwithin the same GC sequence.\n\nnf_tables_module_autoload() temporarily releases the mutex to load\nmodule dependencies, then it goes back to replay the transaction again.\nMove it at the end of the abort phase after nft_gc_seq_end() is called."
        },
        {
          "lang": "es",
          "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: nf_tables: libera mutex despu\u00e9s de nft_gc_seq_end de la ruta de cancelaci\u00f3n. El mutex de confirmaci\u00f3n no debe liberarse durante la secci\u00f3n cr\u00edtica entre nft_gc_seq_begin() y nft_gc_seq_end(); de lo contrario, el trabajador as\u00edncrono de GC podr\u00eda recopilar objetos caducados y obtener el bloqueo de confirmaci\u00f3n liberado dentro de la misma secuencia de GC. nf_tables_module_autoload() libera temporalmente el mutex para cargar las dependencias del m\u00f3dulo, luego vuelve a reproducir la transacci\u00f3n nuevamente. Mu\u00e9valo al final de la fase de cancelaci\u00f3n despu\u00e9s de llamar a nft_gc_seq_end()."
        }
      ],
      "id": "CVE-2024-26925",
      "lastModified": "2024-11-21T09:03:23.883",
      "published": "2024-04-25T06:15:57.590",
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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.
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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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