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."
}
],
"id": "CVE-2022-49114",
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],
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"vulnStatus": "Modified",
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"value": "CWE-416"
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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}
},
"redhat_vex": {
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"current_release_date": "2026-08-04T19:45:35+00:00",
"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": "76",
"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"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-29T02:30:22Z",
"cve": "CVE-2022-49114",
"id": "CVE-2022-49114",
"initial_release_date": "2025-02-27T03:12:03Z",
"product_status:known_affected": "487",
"product_status:known_not_affected": "198",
"product_status:recommended": "380",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2022-49114",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49114.json",
"version": "62"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2022-49114",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-03-04T18:03:27.178498Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "CWE-416 Use After Free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-03-04T18:03:28.399Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
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"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/scsi/libfc/fc_exch.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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{
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{
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{
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"vendor": "Linux",
"versions": [
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"version": "2.6.29"
},
{
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"status": "unaffected",
"version": "0",
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{
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"status": "unaffected",
"version": "4.9.311",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"version": "4.14.276",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.238",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.189",
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},
{
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{
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"version": "5.16.20",
"versionType": "semver"
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{
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"version": "5.17.3",
"versionType": "semver"
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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],
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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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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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