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CVE-2026-74281 (GCVE-0-2026-74281)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:57 – Updated: 2026-08-17 05:45
VLAI
Title
tipc: reject inverted service ranges from peer bindings
Summary
In the Linux kernel, the following vulnerability has been resolved: tipc: reject inverted service ranges from peer bindings tipc_update_nametbl() inserts a binding advertised by a peer node using the lower and upper service-range bounds taken directly from the wire, without checking that lower <= upper. The local bind path validates the ordering (tipc_uaddr_valid()), but the name-distribution path does not. A binding with lower > upper is inserted at the far end of the service-range rbtree (keyed on lower) where no lookup or withdrawal can ever match it (service_range_foreach_match() requires sr->lower <= end). The publication, its service_range node and the augmented rbtree entry are then leaked for the lifetime of the namespace, and there is no per-peer cap equivalent to TIPC_MAX_PUBL on locally created bindings. Reject inverted ranges in the network path as well. A peer node can otherwise leak unbounded binding-table memory by sending PUBLICATION items with lower > upper.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 37922ea4a3105176357c8d565a9d982c4a08714a , < cd1955f81bd8ebeef51b324989ac871ad1947fb6 (git)
Affected: 37922ea4a3105176357c8d565a9d982c4a08714a , < f683200b83a0085d4e11abea8c1fdd9fdfb95b0b (git)
Affected: 37922ea4a3105176357c8d565a9d982c4a08714a , < f1715d92ee3095d9215b493a8603a81f646fcf61 (git)
Affected: 37922ea4a3105176357c8d565a9d982c4a08714a , < 581ef56e5c34d475056ce086dc2ba0e872ba6857 (git)
Affected: 37922ea4a3105176357c8d565a9d982c4a08714a , < 7e401233f9bb74a626e70698d0d62f3a94ac0676 (git)
Affected: 37922ea4a3105176357c8d565a9d982c4a08714a , < 973bf0ed896b9898668dbadb82ed849d7d573010 (git)
Affected: 37922ea4a3105176357c8d565a9d982c4a08714a , < 2afb648f7b99216c687db1f89739c995e1144153 (git)
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Linux Linux Affected: 4.17
Unaffected: 0 , < 4.17 (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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    "dateReserved": "2026-08-15T05:44:03.880Z",
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The local bind path validates the\\nordering (tipc_uaddr_valid()), but the name-distribution path does not.\\n\\nA binding with lower \u003e upper is inserted at the far end of the\\nservice-range rbtree (keyed on lower) where no lookup or withdrawal can\\never match it (service_range_foreach_match() requires sr-\u003elower \u003c= end).\\nThe publication, its service_range node and the augmented rbtree entry\\nare then leaked for the lifetime of the namespace, and there is no\\nper-peer cap equivalent to TIPC_MAX_PUBL on locally created bindings.\\n\\nReject inverted ranges in the network path as well. 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-19T12:44:28+00:00",
      "cve": "CVE-2026-74281",
      "id": "CVE-2026-74281",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tipc: reject inverted service ranges from peer bindings",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74281.json",
      "version": "3"
    }
  }
}



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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.