CVE-2025-21904 (GCVE-0-2025-21904)
Vulnerability from cvelistv5 – Published: 2025-04-01 15:40 – Updated: 2026-05-11 21:08
VLAI
EPSS
VEX
Title
caif_virtio: fix wrong pointer check in cfv_probe()
Summary
In the Linux kernel, the following vulnerability has been resolved:
caif_virtio: fix wrong pointer check in cfv_probe()
del_vqs() frees virtqueues, therefore cfv->vq_tx pointer should be checked
for NULL before calling it, not cfv->vdev. Also the current implementation
is redundant because the pointer cfv->vdev is dereferenced before it is
checked for NULL.
Fix this by checking cfv->vq_tx for NULL instead of cfv->vdev before
calling del_vqs().
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 19:24 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
10 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
0d2e1a2926b1839a4b74519e660739b2566c9386 , < 990fff6980d0c1693d60a812f58dbf93eab0473f
(git)
Affected: 0d2e1a2926b1839a4b74519e660739b2566c9386 , < 7b5fe58959822e6cfa884327cabba6be3b01883d (git) Affected: 0d2e1a2926b1839a4b74519e660739b2566c9386 , < 8e4e08ca4cc634b337bb74bc9a70758fdeda0bcb (git) Affected: 0d2e1a2926b1839a4b74519e660739b2566c9386 , < 29e0cd296c87240278e2f7ea4cf3f496b60c03af (git) Affected: 0d2e1a2926b1839a4b74519e660739b2566c9386 , < 90d302619ee7ce5ed0c69c29c290bdccfde66418 (git) Affected: 0d2e1a2926b1839a4b74519e660739b2566c9386 , < 56cddf71cce3b15b078e937fadab29962b6f6643 (git) Affected: 0d2e1a2926b1839a4b74519e660739b2566c9386 , < 597c27e5f04cb50e56cc9aeda75d3e42b6b89c3e (git) Affected: 0d2e1a2926b1839a4b74519e660739b2566c9386 , < a466fd7e9fafd975949e5945e2f70c33a94b1a70 (git) |
guessed | |
| Linux | Linux |
Affected:
3.10
Unaffected: 0 , < 3.10 (semver) Unaffected: 5.4.291 , ≤ 5.4.* (semver) Unaffected: 5.10.235 , ≤ 5.10.* (semver) Unaffected: 5.15.179 , ≤ 5.15.* (semver) Unaffected: 6.1.131 , ≤ 6.1.* (semver) Unaffected: 6.6.83 , ≤ 6.6.* (semver) Unaffected: 6.12.19 , ≤ 6.12.* (semver) Unaffected: 6.13.7 , ≤ 6.13.* (semver) Unaffected: 6.14 , ≤ * (original_commit_for_fix) |
guessed |
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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},
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},
{
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"scope": "UNCHANGED",
"userInteraction": "NONE",
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},
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"impactScore": 3.6,
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}
],
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{
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},
{
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},
{
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}
],
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{
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"tags": [
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},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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],
"url": "https://git.kernel.org/stable/c/990fff6980d0c1693d60a812f58dbf93eab0473f"
},
{
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"tags": [
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],
"url": "https://git.kernel.org/stable/c/a466fd7e9fafd975949e5945e2f70c33a94b1a70"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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{
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}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
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]
}
},
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"current_release_date": "2026-06-30T00:04:59+00:00",
"cve": "CVE-2025-21904",
"id": "CVE-2025-21904",
"initial_release_date": "2025-04-01T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: caif_virtio: fix wrong pointer check in cfv_probe()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-21904.json",
"version": "3"
},
"vulnrichment": {
"containers": {
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"title": "CVE Program Container"
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}
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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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