CVE-2025-38177 (GCVE-0-2025-38177)
Vulnerability from cvelistv5 – Published: 2025-07-04 12:47 – Updated: 2026-08-05 12:00
VLAI
EPSS
VEX
Title
sch_hfsc: make hfsc_qlen_notify() idempotent
Summary
In the Linux kernel, the following vulnerability has been resolved:
sch_hfsc: make hfsc_qlen_notify() idempotent
hfsc_qlen_notify() is not idempotent either and not friendly
to its callers, like fq_codel_dequeue(). Let's make it idempotent
to ease qdisc_tree_reduce_backlog() callers' life:
1. update_vf() decreases cl->cl_nactive, so we can check whether it is
non-zero before calling it.
2. eltree_remove() always removes RB node cl->el_node, but we can use
RB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 20:40 UTC
Assigner
References
10 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
959466588aa7f84ccf79ae36a1d89542eaf9aaec , < 9a5fd5c2f4d4afdd5e405083ee53e0789ce76956
(git)
Affected: 959466588aa7f84ccf79ae36a1d89542eaf9aaec , < 72c61ffbeeb8c50f6d4d70c65d3283aa1bac57a7 (git) Affected: 959466588aa7f84ccf79ae36a1d89542eaf9aaec , < a5efc95a33bd4fcb879250852828cc58c7862970 (git) Affected: 959466588aa7f84ccf79ae36a1d89542eaf9aaec , < 0475c85426b18eccdcb7f9fb58d8f8e9c6c58c87 (git) Affected: 959466588aa7f84ccf79ae36a1d89542eaf9aaec , < 9030a91235ae4845ec71902c3e0cecfc9ed1f2df (git) Affected: 959466588aa7f84ccf79ae36a1d89542eaf9aaec , < d06476714d2819b550e0cc39222347e2c8941c9d (git) Affected: 959466588aa7f84ccf79ae36a1d89542eaf9aaec , < c1175c4ad01dbc9c979d099861fa90a754f72059 (git) Affected: 959466588aa7f84ccf79ae36a1d89542eaf9aaec , < 51eb3b65544c9efd6a1026889ee5fb5aa62da3bb (git) |
guessed | |
| Linux | Linux |
Affected:
4.14
Unaffected: 0 , < 4.14 (semver) Unaffected: 5.4.297 , ≤ 5.4.* (semver) Unaffected: 5.10.241 , ≤ 5.10.* (semver) Unaffected: 5.15.190 , ≤ 5.15.* (semver) Unaffected: 6.1.138 , ≤ 6.1.* (semver) Unaffected: 6.6.90 , ≤ 6.6.* (semver) Unaffected: 6.12.28 , ≤ 6.12.* (semver) Unaffected: 6.14.6 , ≤ 6.14.* (semver) Unaffected: 6.15 , ≤ * (original_commit_for_fix) |
guessed |
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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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