CVE-2026-74281 (GCVE-0-2026-74281)
Vulnerability from cvelistv5
Published
2026-08-15 05:57
Modified
2026-08-17 05:45
Severity ?
VLAI Severity ?
EPSS score ?
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 37922ea4a3105176357c8d565a9d982c4a08714a Version: 37922ea4a3105176357c8d565a9d982c4a08714a Version: 37922ea4a3105176357c8d565a9d982c4a08714a Version: 37922ea4a3105176357c8d565a9d982c4a08714a Version: 37922ea4a3105176357c8d565a9d982c4a08714a Version: 37922ea4a3105176357c8d565a9d982c4a08714a Version: 37922ea4a3105176357c8d565a9d982c4a08714a |
||
{
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"version": "0",
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{
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"status": "unaffected",
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{
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{
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"version": "6.18.40",
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{
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"version": "7.1.5",
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{
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"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
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"nodes": [
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],
"negate": false,
"operator": "OR"
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: reject inverted service ranges from peer bindings\n\ntipc_update_nametbl() inserts a binding advertised by a peer node using\nthe lower and upper service-range bounds taken directly from the wire,\nwithout checking that lower \u003c= upper. 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. A peer node can\notherwise leak unbounded binding-table memory by sending PUBLICATION\nitems with lower \u003e upper."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - NAME_DISTRIBUTOR PUBLICATION messages from a remote TIPC peer are processed via tipc_rcv/tipc_link_rcv into tipc_named_rcv with no local syscall, matching Network attack vector for in-kernel protocol handlers.\nAC:L - Sending PUBLICATION items with lower\u003eupper reliably triggers permanent leaked binding-table entries; attacker controls both ends of the exchange over an established link with no race or victim-dependent timing.\nPR:N - A malicious or compromised cluster peer can send crafted name-table updates without any account or capability on the victim; TIPC accepts peer publications after normal link setup without per-message authentication by default.\nUI:N - Victim nodes ingest peer binding advertisements automatically during TIPC name distribution; no administrator or user action is required beyond routine cluster connectivity.\nS:U - The flaw only causes unreachable kernel heap growth in the victim\u0027s network namespace and does not cross VM, container, or IOMMU security boundaries.\nC:N - The issue is allocation without corresponding free of publication/service_range objects; it does not read or disclose kernel or user data beyond attacker-chosen binding fields.\nI:N - Inverted ranges create orphaned nametable metadata without corrupting adjacent memory or modifying legitimate bindings, sockets, or user data.\nA:H - Each unique inverted publication permanently leaks publication, service_range, and rbtree nodes with no per-peer cap and failed cleanup on peer loss/withdrawal, enabling repeatable remote kernel memory exhaustion and OOM."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T05:45:22.291Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/cd1955f81bd8ebeef51b324989ac871ad1947fb6"
},
{
"url": "https://git.kernel.org/stable/c/f683200b83a0085d4e11abea8c1fdd9fdfb95b0b"
},
{
"url": "https://git.kernel.org/stable/c/f1715d92ee3095d9215b493a8603a81f646fcf61"
},
{
"url": "https://git.kernel.org/stable/c/581ef56e5c34d475056ce086dc2ba0e872ba6857"
},
{
"url": "https://git.kernel.org/stable/c/7e401233f9bb74a626e70698d0d62f3a94ac0676"
},
{
"url": "https://git.kernel.org/stable/c/973bf0ed896b9898668dbadb82ed849d7d573010"
},
{
"url": "https://git.kernel.org/stable/c/2afb648f7b99216c687db1f89739c995e1144153"
}
],
"title": "tipc: reject inverted service ranges from peer bindings",
"x_generator": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-74281",
"datePublished": "2026-08-15T05:57:51.423Z",
"dateReserved": "2026-08-15T05:44:03.880Z",
"dateUpdated": "2026-08-17T05:45:22.291Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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