CVE-2022-49114 (GCVE-0-2022-49114)
Vulnerability from cvelistv5 – Published: 2025-02-26 01:54 – Updated: 2026-08-05 08:53
VLAI
EPSS
VEX
Title
scsi: libfc: Fix use after free in fc_exch_abts_resp()
Summary
In the Linux kernel, the following vulnerability has been resolved:
scsi: libfc: Fix use after free in fc_exch_abts_resp()
fc_exch_release(ep) will decrease the ep's reference count. When the
reference count reaches zero, it is freed. But ep is still used in the
following code, which will lead to a use after free.
Return after the fc_exch_release() call to avoid use after free.
Severity
8.8 (High)
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-04 18:03 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
9 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < 4a131d4ea8b581ac9b01d3a72754db4848be3232
(git)
Affected: 42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < 499d198494e77b6533251b9b909baf5c101129cb (git) Affected: 42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < 6044ad64f41c87382cfeeca281573d1886d80cbe (git) Affected: 42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < 5cf2ce8967b0d98c8cfa4dc42ef4fcf080f5c836 (git) Affected: 42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < 1d7effe5fff9d28e45e18ac3a564067c7ddfe898 (git) Affected: 42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < f581df412bc45c95176e3c808ee2839c05b2ab0c (git) Affected: 42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < 87909291762d08fdb60d19069d7a89b5b308d0ef (git) Affected: 42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < 412dd8299b02e4410fe77b8396953c1a8dde183a (git) Affected: 42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < 271add11994ba1a334859069367e04d2be2ebdd4 (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.29
Unaffected: 0 , < 2.6.29 (semver) Unaffected: 4.9.311 , ≤ 4.9.* (semver) Unaffected: 4.14.276 , ≤ 4.14.* (semver) Unaffected: 4.19.238 , ≤ 4.19.* (semver) Unaffected: 5.4.189 , ≤ 5.4.* (semver) Unaffected: 5.10.111 , ≤ 5.10.* (semver) Unaffected: 5.15.34 , ≤ 5.15.* (semver) Unaffected: 5.16.20 , ≤ 5.16.* (semver) Unaffected: 5.17.3 , ≤ 5.17.* (semver) Unaffected: 5.18 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: libfc: Se corrige el use-after-free en fc_exch_abts_resp() fc_exch_release(ep) reducir\u00e1 el recuento de referencias de ep. Cuando el recuento de referencias llega a cero, se libera. Pero ep todav\u00eda se usa en el siguiente c\u00f3digo, lo que provocar\u00e1 un use-after-free. Regrese despu\u00e9s de la llamada fc_exch_release() para evitar el use-after-free."
}
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"cve": "CVE-2022-49114",
"id": "CVE-2022-49114",
"initial_release_date": "2022-01-01T00:00:00+00:00",
"product_status:fixed": "681",
"product_status:known_affected": "80",
"product_status:known_not_affected": "77",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: scsi: libfc: Fix use after free in fc_exch_abts_resp()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49114.json",
"version": "3"
},
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"scope": "UNCHANGED",
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"version": "3.1"
}
},
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}
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"version": "2.0.3"
},
"type": "ssvc"
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],
"problemTypes": [
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"cweId": "CWE-416",
"description": "CWE-416 Use After Free",
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}
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"dateUpdated": "2025-03-04T18:03:28.399Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
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],
"cna": {
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"product": "Linux",
"programFiles": [
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"versions": [
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},
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},
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"version": "5.4.189",
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},
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}
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"value": "AV:A - The vulnerable path processes Fibre Channel BLS frames (BA_ACC/BA_RJT) received over an FC SAN fabric or FCoE (ETH_P_FCOE) L2 segment from a peer on the same fabric/VLAN, which is adjacent-network topology, not Internet-routable IP.\nAC:L - An adjacent peer can induce exchange timeouts (delaying responses) so the host sends ABTS with a pending timer, then deliver a crafted BA_ACC/BA_RJT while that timer is still queued, reliably hitting the cancel-and-release path.\nPR:N - fc_exch_recv and the FCoE/HBA receive path accept frames from fabric peers with no OS credential or capability check; fabric zoning only constrains topology, not authenticated privileges on this code path.\nUI:N - Exploitation is fully driven by attacker-sent FC/FCoE frames against an already-configured initiator; no separate victim action such as mounting a volume or confirming a prompt is required.\nS:U - The use-after-free corrupts host kernel exchange/slab state within the same OS security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - Use-after-free of heap-allocated struct fc_exch lets an attacker reclaim the object and obtain arbitrary kernel-memory read primitives, which per guidance is High confidentiality impact.\nI:H - struct fc_exch embeds callable resp and destructor function pointers invoked from this path, so UAF plus heap spray enables arbitrary write and control-flow hijacking.\nA:H - Use-after-free of the exchange object causes kernel oops/panic even when not fully exploited, which is High availability impact and can be retried by sending further ABTS responses."
}
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}
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"state": "PUBLISHED"
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}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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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.