CVE-2022-49053 (GCVE-0-2022-49053)
Vulnerability from cvelistv5 – Published: 2025-02-26 01:54 – Updated: 2026-08-05 08:53
VLAI
EPSS
VEX
Title
scsi: target: tcmu: Fix possible page UAF
Summary
In the Linux kernel, the following vulnerability has been resolved:
scsi: target: tcmu: Fix possible page UAF
tcmu_try_get_data_page() looks up pages under cmdr_lock, but it does not
take refcount properly and just returns page pointer. When
tcmu_try_get_data_page() returns, the returned page may have been freed by
tcmu_blocks_release().
We need to get_page() under cmdr_lock to avoid concurrent
tcmu_blocks_release().
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-27 17:59 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
141685a39151aea95eb56562d2953e919c6c73da , < d7c5d79e50be6e06b669141e3db1f977a0dd4e8e
(git)
Affected: 141685a39151aea95eb56562d2953e919c6c73da , < e3e0e067d5b34e4a68e3cc55f8eebc413f56f8ed (git) Affected: 141685a39151aea95eb56562d2953e919c6c73da , < fb7a5115422fbd6a4d505e8844f1ef5529f10489 (git) Affected: 141685a39151aea95eb56562d2953e919c6c73da , < aec36b98a1bbaa84bfd8299a306e4c12314af626 (git) Affected: 141685a39151aea95eb56562d2953e919c6c73da , < b7f3b5d70c834f49f7d87a2f2ed1c6284d9a0322 (git) Affected: 141685a39151aea95eb56562d2953e919c6c73da , < a9564d84ed9f6ee71017d062d0d2182154294a4b (git) Affected: 141685a39151aea95eb56562d2953e919c6c73da , < a6968f7a367f128d120447360734344d5a3d5336 (git) |
guessed | |
| Linux | Linux |
Affected:
4.12
Unaffected: 0 , < 4.12 (semver) Unaffected: 4.14.276 , ≤ 4.14.* (semver) Unaffected: 4.19.239 , ≤ 4.19.* (semver) Unaffected: 5.4.190 , ≤ 5.4.* (semver) Unaffected: 5.10.112 , ≤ 5.10.* (semver) Unaffected: 5.15.35 , ≤ 5.15.* (semver) Unaffected: 5.17.4 , ≤ 5.17.* (semver) Unaffected: 5.18 , ≤ * (original_commit_for_fix) |
guessed |
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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],
"url": "https://git.kernel.org/stable/c/fb7a5115422fbd6a4d505e8844f1ef5529f10489"
}
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"current_release_date": "2026-06-29T22:49:48+00:00",
"cve": "CVE-2022-49053",
"id": "CVE-2022-49053",
"initial_release_date": "2022-01-01T00:00:00+00:00",
"product_status:known_affected": "184",
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"source": "Red Hat CSAF VEX",
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"title": "kernel: scsi: target: tcmu: Fix possible page UAF",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49053.json",
"version": "3"
},
"vulnrichment": {
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"baseScore": 7.8,
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"scope": "UNCHANGED",
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}
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"id": "CVE-2022-49053",
"options": [
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},
{
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},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-02-27T17:59:25.641949Z",
"version": "2.0.3"
},
"type": "ssvc"
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}
],
"problemTypes": [
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"title": "CISA ADP Vulnrichment"
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"status": "unaffected",
"version": "0",
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},
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"value": "AV:L - The UAF is triggered in tcmu_vma_fault() when a local process faults on the mmap\u0027d TCMU UIO device (/dev/uioX); network I/O can only drive reclaim, not the use side.\nAC:L - A malicious TCMU handler controls page faults on the mmap and can drive command completion/allocation patterns that schedule tcmu_blocks_release(), so both sides of the race are attacker-influenced and retryable.\nPR:L - Exploitation requires opening/mmap\u0027ing an existing TCMU UIO device and acting as (or replacing) the userspace handler; TCMU\u2019s design assumes a malicious handler and no capability check exists on the fault path beyond ordinary local device access.\nUI:N - No separate victim action is required; the attacker triggers faults and reclaim themselves once they have the mapped TCMU device.\nS:U - Impact is confined to the local kernel/host authority (memory corruption/privilege escalation); this is not a VM/IOMMU/sandbox boundary escape.\nC:H - Page UAF in the fault path can map a freed and reallocated page into userspace, enabling arbitrary kernel/user memory disclosure.\nI:H - The same UAF/page remap primitive enables heap spraying and arbitrary writes/control-flow hijacking in the kernel.\nA:H - Use-after-free of a page during fault handling can cause kernel oops/panic even without a full exploit."
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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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