CVE-2026-68418 (GCVE-0-2026-68418)
Vulnerability from cvelistv5 – Published: 2026-08-10 12:04 – Updated: 2026-08-17 05:05
VLAI
EPSS
VEX
Title
RDMA/irdma: Prevent user-triggered null deref on QP create
Summary
In the Linux kernel, the following vulnerability has been resolved:
RDMA/irdma: Prevent user-triggered null deref on QP create
Previously, the user QP creation path would only attempt to
populate iwqp->iwpbl if the user-provided req.user_wqe_bufs
field was non-zero. The problem is that iwqp->iwpbl is
unconditionally dereferenced later on in irdma_setup_virt_qp.
While there was a check for iwqp->iwpbl != NULL, this check
would only occur if req.user_wqe_bufs was non-zero. The end
result is that a user could send a zero user_wqe_bufs value
and trigger a null ptr deref.
Fix this by unconditionally calling irdma_get_pbl and bailing
if it fails, similar to the CQ and SRQ paths.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
b48c24c2d710cf34810c555dcef883a3d35a9c08 , < ec675b4cdfd378d8c9dd8c93126c024f2469bd79
(git)
Affected: b48c24c2d710cf34810c555dcef883a3d35a9c08 , < 728211c815f6eef28dd3df2a5b6297483185aa20 (git) Affected: b48c24c2d710cf34810c555dcef883a3d35a9c08 , < b9b0889071569d43623c260074e159cd8f26adb1 (git) |
|
| Linux | Linux |
Affected:
5.14
Unaffected: 0 , < 5.14 (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/infiniband/hw/irdma/verbs.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"status": "affected",
"version": "b48c24c2d710cf34810c555dcef883a3d35a9c08",
"versionType": "git"
},
{
"lessThan": "728211c815f6eef28dd3df2a5b6297483185aa20",
"status": "affected",
"version": "b48c24c2d710cf34810c555dcef883a3d35a9c08",
"versionType": "git"
},
{
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"status": "affected",
"version": "b48c24c2d710cf34810c555dcef883a3d35a9c08",
"versionType": "git"
}
]
},
{
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"product": "Linux",
"programFiles": [
"drivers/infiniband/hw/irdma/verbs.c"
],
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"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.14"
},
{
"lessThan": "5.14",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.18.42",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"vulnerable": true
},
{
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},
{
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"versionStartIncluding": "5.14",
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/irdma: Prevent user-triggered null deref on QP create\n\nPreviously, the user QP creation path would only attempt to\npopulate iwqp-\u003eiwpbl if the user-provided req.user_wqe_bufs\nfield was non-zero. The problem is that iwqp-\u003eiwpbl is\nunconditionally dereferenced later on in irdma_setup_virt_qp.\n\nWhile there was a check for iwqp-\u003eiwpbl != NULL, this check\nwould only occur if req.user_wqe_bufs was non-zero. The end\nresult is that a user could send a zero user_wqe_bufs value\nand trigger a null ptr deref.\n\nFix this by unconditionally calling irdma_get_pbl and bailing\nif it fails, similar to the CQ and SRQ paths."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T05:05:13.218Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
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"url": "https://git.kernel.org/stable/c/ec675b4cdfd378d8c9dd8c93126c024f2469bd79"
},
{
"url": "https://git.kernel.org/stable/c/728211c815f6eef28dd3df2a5b6297483185aa20"
},
{
"url": "https://git.kernel.org/stable/c/b9b0889071569d43623c260074e159cd8f26adb1"
}
],
"title": "RDMA/irdma: Prevent user-triggered null deref on QP create",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2026-68418",
"datePublished": "2026-08-10T12:04:38.930Z",
"dateReserved": "2026-07-30T09:28:09.391Z",
"dateUpdated": "2026-08-17T05:05:13.218Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-68418",
"date": "2026-10-14",
"epss": "0.00155",
"percentile": "0.04153"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/infiniband/hw/irdma/verbs.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"version": "b48c24c2d710cf34810c555dcef883a3d35a9c08",
"versionType": "git"
},
{
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"status": "affected",
"version": "b48c24c2d710cf34810c555dcef883a3d35a9c08",
"versionType": "git"
},
{
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}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/infiniband/hw/irdma/verbs.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": "6.18.42",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.6",
"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: Prevent user-triggered null deref on QP create\n\nPreviously, the user QP creation path would only attempt to\npopulate iwqp-\u003eiwpbl if the user-provided req.user_wqe_bufs\nfield was non-zero. The problem is that iwqp-\u003eiwpbl is\nunconditionally dereferenced later on in irdma_setup_virt_qp.\n\nWhile there was a check for iwqp-\u003eiwpbl != NULL, this check\nwould only occur if req.user_wqe_bufs was non-zero. The end\nresult is that a user could send a zero user_wqe_bufs value\nand trigger a null ptr deref.\n\nFix this by unconditionally calling irdma_get_pbl and bailing\nif it fails, similar to the CQ and SRQ paths."
}
],
"id": "CVE-2026-68418",
"lastModified": "2026-08-17T06:17:50.810",
"metrics": {},
"published": "2026-08-10T13:20:35.623",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/728211c815f6eef28dd3df2a5b6297483185aa20"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/b9b0889071569d43623c260074e159cd8f26adb1"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/ec675b4cdfd378d8c9dd8c93126c024f2469bd79"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-08-31T11:45:36+00:00",
"cve": "CVE-2026-68418",
"id": "CVE-2026-68418",
"initial_release_date": "2026-08-10T00:00:00+00:00",
"product_status:known_affected": "233",
"product_status:known_not_affected": "44",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: RDMA/irdma: Prevent user-triggered null deref on QP create",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68418.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-10-03T00:31:41Z",
"cve": "CVE-2026-68418",
"id": "CVE-2026-68418",
"initial_release_date": "2026-08-11T23:45:57Z",
"product_status:known_affected": "586",
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"product_status:recommended": "252",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-68418",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68418.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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