CVE-2026-72494 (GCVE-0-2026-72494)
Vulnerability from cvelistv5 – Published: 2026-08-15 05:57 – Updated: 2026-09-21 13:13
VLAI
EPSS
VEX
Title
RDMA/irdma: Replace waitqueue and flag with completion
Summary
In the Linux kernel, the following vulnerability has been resolved:
RDMA/irdma: Replace waitqueue and flag with completion
The driver previously used a waitqueue along with an explicit
request_done flag, but without proper barriers around request_done.
An earlier patch by Gui-Dong Han <hanguidong02@gmail.com> attempted
to fix this by adding the missing memory barriers. Rather than
adding the barriers, this patch replaces the waitqueue+flag with
a completion, which is designed for this exact purpose.
Severity
9.8 (Critical)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
44d9e52977a1b90b0db1c7f8b197c218e9226520 , < 706591cccdd3ac2c0ddc8c2ed6c89a6be9865826
(git)
Affected: 44d9e52977a1b90b0db1c7f8b197c218e9226520 , < bde37aed0724c0139dea177f3aae8d989b6babb1 (git) Affected: 44d9e52977a1b90b0db1c7f8b197c218e9226520 , < d9c8c45e6d2f438a3c8e643ae78b59454fa0fadd (git) |
guessed | |
| Linux | Linux |
Affected:
5.14
Unaffected: 0 , < 5.14 (semver) Unaffected: 6.18.53 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/infiniband/hw/irdma/hw.c",
"drivers/infiniband/hw/irdma/main.h",
"drivers/infiniband/hw/irdma/utils.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "706591cccdd3ac2c0ddc8c2ed6c89a6be9865826",
"status": "affected",
"version": "44d9e52977a1b90b0db1c7f8b197c218e9226520",
"versionType": "git"
},
{
"lessThan": "bde37aed0724c0139dea177f3aae8d989b6babb1",
"status": "affected",
"version": "44d9e52977a1b90b0db1c7f8b197c218e9226520",
"versionType": "git"
},
{
"lessThan": "d9c8c45e6d2f438a3c8e643ae78b59454fa0fadd",
"status": "affected",
"version": "44d9e52977a1b90b0db1c7f8b197c218e9226520",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/infiniband/hw/irdma/hw.c",
"drivers/infiniband/hw/irdma/main.h",
"drivers/infiniband/hw/irdma/utils.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.14"
},
{
"lessThan": "5.14",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.53",
"versionStartIncluding": "5.14",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.5",
"versionStartIncluding": "5.14",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "5.14",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/irdma: Replace waitqueue and flag with completion\n\nThe driver previously used a waitqueue along with an explicit\nrequest_done flag, but without proper barriers around request_done.\n\nAn earlier patch by Gui-Dong Han \u003changuidong02@gmail.com\u003e attempted\nto fix this by adding the missing memory barriers. Rather than\nadding the barriers, this patch replaces the waitqueue+flag with\na completion, which is designed for this exact purpose."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - Intel irdma CQP completion/wait synchronization is exercised from remote iWARP/RoCE connection management (SYN/listener/IEQ/AEQ) and deferred-completion events, not only local ibverbs; network peers drive the completion side of the race on internet-facing RDMA/NFS/SMB-Direct servers.\nAC:L - Attacker controls both sides by flooding concurrent connections/CQP ops remotely or via concurrent RDMA verbs locally; missing release/acquire ordering on request_done vs compl_info is triggerable at high operation rates without luck-dependent layout.\nPR:N - Remote CM and packet-processing paths issue/wait on CQP before MPA/application auth; local exploitation needs only standard unprivileged /dev/infiniband/uverbs* access (0666 under typical rdma-core udev rules), not init-namespace capabilities.\nUI:N - Exploitation needs only attacker-driven network or verbs traffic against an already-bound RDMA device/listener; no additional victim user action at attack time beyond normal server role.\nS:U - Impact stays within kernel/driver security domain (CQP request objects, NIC PF reset); no VM escape or cross-authority boundary.\nC:H - Without proper barriers the waiter can observe request_done before compl_info stores, return success with stale op_ret_val/error, and recycle the cqp_request while hardware still references scratch \u2192 UAF/read primitives.\nI:H - Premature recycle/double-put of dynamic cqp_requests enables attacker-influenced heap reuse; stale callbacks on reused objects and invalid kfree paths provide kernel write/control-flow corruption primitives.\nA:H - Lost request_done causes CQP timeout \u2192 ice_rdma_request_reset PF reset; wrong completion state can leave mod_qp_waitq in uninterruptible wait; UAF/panic paths cause kernel crash/hang."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-21T13:13:54.011Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/706591cccdd3ac2c0ddc8c2ed6c89a6be9865826"
},
{
"url": "https://git.kernel.org/stable/c/bde37aed0724c0139dea177f3aae8d989b6babb1"
},
{
"url": "https://git.kernel.org/stable/c/d9c8c45e6d2f438a3c8e643ae78b59454fa0fadd"
}
],
"title": "RDMA/irdma: Replace waitqueue and flag with completion",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-72494",
"datePublished": "2026-08-15T05:57:28.280Z",
"dateReserved": "2026-08-09T03:40:39.937Z",
"dateUpdated": "2026-09-21T13:13:54.011Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-72494",
"date": "2026-10-09",
"epss": "0.00649",
"percentile": "0.49594"
},
"microsoft_vex": {
"current_release_date": "2026-08-23T14:46:30.000Z",
"cve": "CVE-2026-72494",
"id": "msrc_CVE-2026-72494",
"initial_release_date": "2026-08-23T14:46:30.000Z",
"product_status:known_not_affected": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "RDMA/irdma: Replace waitqueue and flag with completion",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-72494.json",
"version": "1"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/infiniband/hw/irdma/hw.c",
"drivers/infiniband/hw/irdma/main.h",
"drivers/infiniband/hw/irdma/utils.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "706591cccdd3ac2c0ddc8c2ed6c89a6be9865826",
"status": "affected",
"version": "44d9e52977a1b90b0db1c7f8b197c218e9226520",
"versionType": "git"
},
{
"lessThan": "bde37aed0724c0139dea177f3aae8d989b6babb1",
"status": "affected",
"version": "44d9e52977a1b90b0db1c7f8b197c218e9226520",
"versionType": "git"
},
{
"lessThan": "d9c8c45e6d2f438a3c8e643ae78b59454fa0fadd",
"status": "affected",
"version": "44d9e52977a1b90b0db1c7f8b197c218e9226520",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/infiniband/hw/irdma/hw.c",
"drivers/infiniband/hw/irdma/main.h",
"drivers/infiniband/hw/irdma/utils.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.14"
},
{
"lessThan": "5.14",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"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/irdma: Replace waitqueue and flag with completion\n\nThe driver previously used a waitqueue along with an explicit\nrequest_done flag, but without proper barriers around request_done.\n\nAn earlier patch by Gui-Dong Han \u003changuidong02@gmail.com\u003e attempted\nto fix this by adding the missing memory barriers. Rather than\nadding the barriers, this patch replaces the waitqueue+flag with\na completion, which is designed for this exact purpose."
}
],
"id": "CVE-2026-72494",
"lastModified": "2026-09-21T14:17:17.923",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
]
},
"published": "2026-08-15T06:22:23.747",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/706591cccdd3ac2c0ddc8c2ed6c89a6be9865826"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/bde37aed0724c0139dea177f3aae8d989b6babb1"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/d9c8c45e6d2f438a3c8e643ae78b59454fa0fadd"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-09-01T10:42:42+00:00",
"cve": "CVE-2026-72494",
"id": "CVE-2026-72494",
"initial_release_date": "2026-08-15T00:00:00+00:00",
"product_status:known_affected": "232",
"product_status:known_not_affected": "42",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: RDMA/irdma: Replace waitqueue and flag with completion",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72494.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-10-03T00:27:21Z",
"cve": "CVE-2026-72494",
"id": "CVE-2026-72494",
"initial_release_date": "2026-08-27T00:23:10Z",
"product_status:known_affected": "578",
"product_status:known_not_affected": "143",
"product_status:recommended": "252",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-72494",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-72494.json",
"version": "11"
}
}
}
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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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