CVE-2026-23451 (GCVE-0-2026-23451)
Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-08-05 12:21
VLAI
EPSS
VEX
Title
bonding: prevent potential infinite loop in bond_header_parse()
Summary
In the Linux kernel, the following vulnerability has been resolved:
bonding: prevent potential infinite loop in bond_header_parse()
bond_header_parse() can loop if a stack of two bonding devices is setup,
because skb->dev always points to the hierarchy top.
Add new "const struct net_device *dev" parameter to
(struct header_ops)->parse() method to make sure the recursion
is bounded, and that the final leaf parse method is called.
Severity
7.5 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
5d0fb9806ab6cf2c3cfba0e1b8c701da65e25af8 , < 9532d0d0ad1d726c06f807e8f0f1ec93cbabb452
(git)
Affected: 9baf26a91565b7bb2b1d9f99aaf884a2b28c2f6d , < 946bb6cacf0ccada7bc80f1cfa07c1ed79511c1c (git) Affected: 6ac890f1d60ac3707ee8dae15a67d9a833e49956 , < 4172a7901cf43fe1cc63ef7a2ef33735ff7b7d13 (git) Affected: 95597d11dc8bddb2b9a051c9232000bfbb5e43ba , < 9b49c854f14f5e2d493e562a1e28d2e57fe37371 (git) Affected: 950803f7254721c1c15858fbbfae3deaaeeecb11 , < b7405dcf7385445e10821777143f18c3ce20fa04 (git) |
guessed | |
| Linux | Linux |
Affected:
6.18.19 , < 6.18.20
(semver)
Affected: 6.19.9 , < 6.19.10 (semver) |
guessed |
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"include/linux/netdevice.h",
"net/ethernet/eth.c",
"net/ipv4/ip_gre.c",
"net/mac802154/iface.c",
"net/phonet/af_phonet.c"
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"include/linux/netdevice.h",
"net/ethernet/eth.c",
"net/ipv4/ip_gre.c",
"net/mac802154/iface.c",
"net/phonet/af_phonet.c"
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}
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"value": "AV:N - In a reasonable affected deployment, a remote peer can send a packet, including GRE traffic, that arrives through a stacked bonding hierarchy and triggers AF_PACKET/NFLOG/NFQUEUE hardware-address parsing on the top bond. The vulnerable code is reached from network packet receive processing, not from a physical or purely local-only interface.\nAC:L - Once the stacked bond and packet metadata consumer exist, a single matching received packet deterministically enters `dev_parse_header()` and recurses indefinitely. There is no race, timing window, heap shaping, or attacker-uncontrolled probabilistic condition needed to trigger the denial of service.\nPR:N - The network-triggered path does not require the remote attacker to authenticate or hold local privileges; they only need to send traffic to the affected interface/tunnel. Although local namespace users can also create a reproducer with CAP_NET_ADMIN/CAP_NET_RAW in their namespace, the highest reasonable scenario requires no attacker privileges.\nUI:N - No victim action is required at exploit time when the affected bond stack and packet logging/capture path are already active. The packet alone triggers the vulnerable parse path.\nS:U - The impact remains within the kernel/networking security authority of the vulnerable system. There is no VM escape, sandbox boundary crossing, or separate security scope affected.\nC:N - The bug is an unbounded recursive call caused by using the top-level `skb-\u003edev`; it does not create an information disclosure or controlled read primitive.\nI:N - The vulnerable path does not corrupt attacker-selected data or provide a write/control-flow primitive; the final lower-device parser is never reached. The observed consequence is recursion leading to denial of service.\nA:H - The infinite recursion can hang kernel packet processing and lead to stack overflow/lockdep exhaustion or kernel crash. This is a high availability impact."
}
]
}
],
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"dateUpdated": "2026-08-05T12:21:51.936Z",
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"url": "https://git.kernel.org/stable/c/b7405dcf7385445e10821777143f18c3ce20fa04"
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"title": "bonding: prevent potential infinite loop in bond_header_parse()",
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"datePublished": "2026-04-03T15:15:33.776Z",
"dateReserved": "2026-01-13T15:37:46.020Z",
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"drivers/net/bonding/bond_main.c",
"include/linux/etherdevice.h",
"include/linux/if_ether.h",
"include/linux/netdevice.h",
"net/ethernet/eth.c",
"net/ipv4/ip_gre.c",
"net/mac802154/iface.c",
"net/phonet/af_phonet.c"
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"drivers/net/bonding/bond_main.c",
"include/linux/etherdevice.h",
"include/linux/if_ether.h",
"include/linux/netdevice.h",
"net/ethernet/eth.c",
"net/ipv4/ip_gre.c",
"net/mac802154/iface.c",
"net/phonet/af_phonet.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
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}
],
"id": "CVE-2026-23451",
"lastModified": "2026-07-24T21:10:00.143",
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"published": "2026-04-03T16:16:31.460",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-835"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
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},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-30T11:46:03+00:00",
"cve": "CVE-2026-23451",
"id": "CVE-2026-23451",
"initial_release_date": "2026-04-03T00:00:00+00:00",
"product_status:known_affected": "14",
"product_status:known_not_affected": "260",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: bonding: prevent potential infinite loop in bond_header_parse()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23451.json",
"version": "3"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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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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