CVE-2026-92514 (GCVE-0-2026-92514)
Vulnerability from cvelistv5 – Published: 2026-09-17 16:10 – Updated: 2026-09-17 16:10
VLAI
EPSS
VEX
Title
RDMA/erdma: Fix CEQ tasklet use-after-free on removal
Summary
In the Linux kernel, the following vulnerability has been resolved:
RDMA/erdma: Fix CEQ tasklet use-after-free on removal
Each CEQ interrupt handler only schedules eqc->tasklet. The tasklet calls
erdma_ceq_completion_handler(), which reads the DMA-coherent EQ ring
through get_next_valid_eqe() and updates eq->dbrec through notify_eq().
erdma_ceqs_uninit() frees each CEQ IRQ and then destroys its EQ.
free_irq() prevents another hard IRQ and waits for an in-flight handler,
but it does not drain a tasklet that the handler already scheduled. The
tasklet can therefore access eq->qbuf or eq->dbrec after
erdma_eq_destroy() frees them.
Clearing ceq_cb->ready does not synchronize with a tasklet that already
passed the check at the start of erdma_ceq_completion_handler().
Kill the tasklet after free_irq(), when no handler can schedule it again,
and before erdma_ceq_uninit_one() releases the EQ buffers.
Severity
No CVSS data available.
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
f2a0a630b953451a59a2612ad8c29246638f0a38 , < 0e8b78dabb1f156db05ffe74c6eae861167c7c21
(git)
Affected: f2a0a630b953451a59a2612ad8c29246638f0a38 , < 6e129c1310abfa786a510cc63e69c5ef12349048 (git) Affected: f2a0a630b953451a59a2612ad8c29246638f0a38 , < f738c0a372d36a10dfae6dc357717c13b2aa72f4 (git) Affected: f2a0a630b953451a59a2612ad8c29246638f0a38 , < a60c36d8d17f1b86705523d5eb6d290df28831e5 (git) Affected: f2a0a630b953451a59a2612ad8c29246638f0a38 , < 61a25b8d333e1eb2a189881d516f8d5194e26840 (git) Affected: f2a0a630b953451a59a2612ad8c29246638f0a38 , < 0ca79979384f031d710c4b3bae065dcb5d95aca3 (git) |
guessed | |
| Linux | Linux |
Affected:
6.0
Unaffected: 0 , < 6.0 (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/infiniband/hw/erdma/erdma_eq.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "0e8b78dabb1f156db05ffe74c6eae861167c7c21",
"status": "affected",
"version": "f2a0a630b953451a59a2612ad8c29246638f0a38",
"versionType": "git"
},
{
"lessThan": "6e129c1310abfa786a510cc63e69c5ef12349048",
"status": "affected",
"version": "f2a0a630b953451a59a2612ad8c29246638f0a38",
"versionType": "git"
},
{
"lessThan": "f738c0a372d36a10dfae6dc357717c13b2aa72f4",
"status": "affected",
"version": "f2a0a630b953451a59a2612ad8c29246638f0a38",
"versionType": "git"
},
{
"lessThan": "a60c36d8d17f1b86705523d5eb6d290df28831e5",
"status": "affected",
"version": "f2a0a630b953451a59a2612ad8c29246638f0a38",
"versionType": "git"
},
{
"lessThan": "61a25b8d333e1eb2a189881d516f8d5194e26840",
"status": "affected",
"version": "f2a0a630b953451a59a2612ad8c29246638f0a38",
"versionType": "git"
},
{
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"status": "affected",
"version": "f2a0a630b953451a59a2612ad8c29246638f0a38",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/infiniband/hw/erdma/erdma_eq.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.0"
},
{
"lessThan": "6.0",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.3-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.188",
"versionStartIncluding": "6.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.157",
"versionStartIncluding": "6.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.110",
"versionStartIncluding": "6.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.52",
"versionStartIncluding": "6.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2.6",
"versionStartIncluding": "6.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.3-rc1",
"versionStartIncluding": "6.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/erdma: Fix CEQ tasklet use-after-free on removal\n\nEach CEQ interrupt handler only schedules eqc-\u003etasklet. The tasklet calls\nerdma_ceq_completion_handler(), which reads the DMA-coherent EQ ring\nthrough get_next_valid_eqe() and updates eq-\u003edbrec through notify_eq().\n\nerdma_ceqs_uninit() frees each CEQ IRQ and then destroys its EQ.\nfree_irq() prevents another hard IRQ and waits for an in-flight handler,\nbut it does not drain a tasklet that the handler already scheduled. The\ntasklet can therefore access eq-\u003eqbuf or eq-\u003edbrec after\nerdma_eq_destroy() frees them.\n\nClearing ceq_cb-\u003eready does not synchronize with a tasklet that already\npassed the check at the start of erdma_ceq_completion_handler().\n\nKill the tasklet after free_irq(), when no handler can schedule it again,\nand before erdma_ceq_uninit_one() releases the EQ buffers."
}
],
"providerMetadata": {
"dateUpdated": "2026-09-17T16:10:23.462Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/0e8b78dabb1f156db05ffe74c6eae861167c7c21"
},
{
"url": "https://git.kernel.org/stable/c/6e129c1310abfa786a510cc63e69c5ef12349048"
},
{
"url": "https://git.kernel.org/stable/c/f738c0a372d36a10dfae6dc357717c13b2aa72f4"
},
{
"url": "https://git.kernel.org/stable/c/a60c36d8d17f1b86705523d5eb6d290df28831e5"
},
{
"url": "https://git.kernel.org/stable/c/61a25b8d333e1eb2a189881d516f8d5194e26840"
},
{
"url": "https://git.kernel.org/stable/c/0ca79979384f031d710c4b3bae065dcb5d95aca3"
}
],
"title": "RDMA/erdma: Fix CEQ tasklet use-after-free on removal",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-92514",
"datePublished": "2026-09-17T16:10:23.462Z",
"dateReserved": "2026-09-16T12:21:13.873Z",
"dateUpdated": "2026-09-17T16:10:23.462Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/infiniband/hw/erdma/erdma_eq.c"
],
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"vendor": "Linux",
"versions": [
{
"lessThan": "0e8b78dabb1f156db05ffe74c6eae861167c7c21",
"status": "affected",
"version": "f2a0a630b953451a59a2612ad8c29246638f0a38",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
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"versionType": "git"
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"versionType": "git"
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{
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"status": "affected",
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"versionType": "git"
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{
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"versionType": "git"
}
]
},
{
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"product": "Linux",
"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.0"
},
{
"lessThan": "6.0",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
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"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.3-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/erdma: Fix CEQ tasklet use-after-free on removal\n\nEach CEQ interrupt handler only schedules eqc-\u003etasklet. The tasklet calls\nerdma_ceq_completion_handler(), which reads the DMA-coherent EQ ring\nthrough get_next_valid_eqe() and updates eq-\u003edbrec through notify_eq().\n\nerdma_ceqs_uninit() frees each CEQ IRQ and then destroys its EQ.\nfree_irq() prevents another hard IRQ and waits for an in-flight handler,\nbut it does not drain a tasklet that the handler already scheduled. The\ntasklet can therefore access eq-\u003eqbuf or eq-\u003edbrec after\nerdma_eq_destroy() frees them.\n\nClearing ceq_cb-\u003eready does not synchronize with a tasklet that already\npassed the check at the start of erdma_ceq_completion_handler().\n\nKill the tasklet after free_irq(), when no handler can schedule it again,\nand before erdma_ceq_uninit_one() releases the EQ buffers."
}
],
"id": "CVE-2026-92514",
"lastModified": "2026-09-17T17:17:54.243",
"metrics": {},
"published": "2026-09-17T17:17:54.243",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/0ca79979384f031d710c4b3bae065dcb5d95aca3"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/0e8b78dabb1f156db05ffe74c6eae861167c7c21"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/61a25b8d333e1eb2a189881d516f8d5194e26840"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/6e129c1310abfa786a510cc63e69c5ef12349048"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/a60c36d8d17f1b86705523d5eb6d290df28831e5"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/f738c0a372d36a10dfae6dc357717c13b2aa72f4"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
}
}
}
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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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