CVE-2026-53087 (GCVE-0-2026-53087)
Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-08-05 12:33
VLAI
EPSS
VEX
Title
net: bcmgenet: fix leaking free_bds
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: bcmgenet: fix leaking free_bds
While reclaiming the tx queue we fast forward the write pointer to
drop any data in flight. These dropped frames are not added back
to the pool of free bds. We also need to tell the netdev that we
are dropping said data.
Severity
7.5 (High)
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
6a84791b63044cdee3ab55eb350e6352b751f584 , < 150d06aae1839a6564ab200ef0e7291c3528bbb0
(git)
Affected: 991cd78f95f2a1d6097669afaff66aeeba35f5fd , < 52b9f80993698138b90e5ca3a72550a2501f2a96 (git) Affected: 3877efc13053408f4cf2e821006d6ddd1929200f , < 3c3abbcfa05bad17965498ff7cc94c2418fa94b3 (git) Affected: f1bacae8b655163dcbc3c54b9e714ef1a8986d7b , < 25ff3a3e47ea635ec08dc93e84dd2bfe15abfebb (git) Affected: f1bacae8b655163dcbc3c54b9e714ef1a8986d7b , < ac4a29c331ecb5b10240c44247a8e010c95bc15b (git) Affected: f1bacae8b655163dcbc3c54b9e714ef1a8986d7b , < 3f3168300efb839028328d720ab3962f91d6a0d0 (git) |
guessed | |
| Linux | Linux |
Affected:
6.15
Unaffected: 0 , < 6.15 (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
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}
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{
"lang": "en",
"value": "AV:N - The vulnerable TX reclaim is reached through the network transmit path for packets sent via a bcmgenet Ethernet interface. In a reasonable internet-facing or forwarding deployment, remote traffic can elicit outbound replies or forwarded packets and drive the affected TX queue into the timeout/reclaim path.\nAC:L - No attacker-controlled race is required; once unsent descriptors are reclaimed, the descriptor-credit loss is deterministic. Although timeout timing depends on traffic/load, the affected small queues are known to be prone to repeated timeouts, so the higher-severity low complexity value is appropriate.\nPR:N - In the remote network scenario, the attacker does not need local access or authentication to send traffic that causes the target to transmit packets. The driver timeout/reclaim path has no privilege check once the interface is running.\nUI:N - No victim user action is required beyond the system having the affected interface up and handling network traffic. The reclaim is invoked by kernel network/device watchdog and interface paths.\nS:U - The impact remains within the kernel/network-device security authority of the affected system. There is no VM escape, IOMMU/DMA boundary bypass, or cross-scope privilege boundary change.\nC:N - The bug undercounts reusable TX descriptors and leaves netdev TX accounting stale; SKBs and DMA mappings are freed. I found no attacker-controlled memory read or information disclosure primitive.\nI:N - The missing accounting does not overrun descriptor rings or provide an arbitrary write/control-flow primitive. Its effect is packet dropping/TX lockup rather than unauthorized data modification.\nA:H - Repeated forced reclaims can leak TX descriptor credits until the queue, and potentially the entire transmit side, locks up. This can cause complete loss of network transmission for the affected interface until reset or reinitialization."
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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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