CVE-2026-90415 (GCVE-0-2026-90415)
Vulnerability from cvelistv5 – Published: 2026-09-17 16:09 – Updated: 2026-10-19 09:03
VLAI
EPSS
VEX
Title
RDMA/cxgb4: free STAG index when TPT entry write fails
Summary
In the Linux kernel, the following vulnerability has been resolved:
RDMA/cxgb4: free STAG index when TPT entry write fails
write_tpt_entry() allocates a new STAG index with c4iw_get_resource() and
bumps stats.stag.cur before programming the entry. When
write_adapter_mem() fails, it returns the error without releasing the index
or reversing the statistic. No MR is inserted into rhp->mrs, so
deregistration never reclaims it, leaking the index until device teardown.
Record whether this call allocated the index and, on a failed write, return
it to tpt_table and decrement stats.stag.cur. Key the rollback on both the
write error and that flag, not the error alone: a non-reset update carries
a caller-owned STAG that this call did not allocate and must not free.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
ec3eead217181d7360a11317a888ceb30807867c , < 5fe4731bfbd8d83c4a14b4af3a27329969ce8a99
(git)
Affected: ec3eead217181d7360a11317a888ceb30807867c , < 8f6976d635d190e3d7af7103daaa581cf1ccc12e (git) Affected: ec3eead217181d7360a11317a888ceb30807867c , < 9eeafcda1d6c11f0eec532243c4e96ec8c632bd7 (git) Affected: ec3eead217181d7360a11317a888ceb30807867c , < 5a21e5114cec4cd3f8a2843d4c46bc49634d6e96 (git) Affected: ec3eead217181d7360a11317a888ceb30807867c , < 2f17ca7ab5269ac2504e1039c3921373dccd7712 (git) Affected: ec3eead217181d7360a11317a888ceb30807867c , < a2e37d1ab773be3cd26b1c19593ca2dbcece9c57 (git) Affected: ec3eead217181d7360a11317a888ceb30807867c , < a64e2beb450179a5d43034af8d5476a11eac1486 (git) Affected: ec3eead217181d7360a11317a888ceb30807867c , < fdfb5cea4bf070cdb31d997efd87bb684df041fd (git) |
guessed | |
| Linux | Linux |
Affected:
3.5
Unaffected: 0 , < 3.5 (semver) Unaffected: 5.10.270 , ≤ 5.10.* (semver) Unaffected: 5.15.221 , ≤ 5.15.* (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 , ≤ * (original_commit_for_fix) |
guessed |
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"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.5"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "5.10.270",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.221",
"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",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.221",
"versionStartIncluding": "3.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.188",
"versionStartIncluding": "3.5",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.157",
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},
{
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"versionEndExcluding": "6.12.110",
"versionStartIncluding": "3.5",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.52",
"versionStartIncluding": "3.5",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: free STAG index when TPT entry write fails\n\nwrite_tpt_entry() allocates a new STAG index with c4iw_get_resource() and\nbumps stats.stag.cur before programming the entry. When\nwrite_adapter_mem() fails, it returns the error without releasing the index\nor reversing the statistic. No MR is inserted into rhp-\u003emrs, so\nderegistration never reclaims it, leaking the index until device teardown.\n\nRecord whether this call allocated the index and, on a failed write, return\nit to tpt_table and decrement stats.stag.cur. Key the rollback on both the\nwrite error and that flag, not the error alone: a non-reset update carries\na caller-owned STAG that this call did not allocate and must not free."
}
],
"providerMetadata": {
"dateUpdated": "2026-10-19T09:03:19.452Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/5fe4731bfbd8d83c4a14b4af3a27329969ce8a99"
},
{
"url": "https://git.kernel.org/stable/c/8f6976d635d190e3d7af7103daaa581cf1ccc12e"
},
{
"url": "https://git.kernel.org/stable/c/9eeafcda1d6c11f0eec532243c4e96ec8c632bd7"
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{
"url": "https://git.kernel.org/stable/c/5a21e5114cec4cd3f8a2843d4c46bc49634d6e96"
},
{
"url": "https://git.kernel.org/stable/c/2f17ca7ab5269ac2504e1039c3921373dccd7712"
},
{
"url": "https://git.kernel.org/stable/c/a2e37d1ab773be3cd26b1c19593ca2dbcece9c57"
},
{
"url": "https://git.kernel.org/stable/c/a64e2beb450179a5d43034af8d5476a11eac1486"
},
{
"url": "https://git.kernel.org/stable/c/fdfb5cea4bf070cdb31d997efd87bb684df041fd"
}
],
"title": "RDMA/cxgb4: free STAG index when TPT entry write fails",
"x_generator": {
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"cveId": "CVE-2026-90415",
"datePublished": "2026-09-17T16:09:40.714Z",
"dateReserved": "2026-09-11T19:38:34.813Z",
"dateUpdated": "2026-10-19T09:03:19.452Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
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"date": "2026-11-01",
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"percentile": "0.07214"
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"id": "msrc_CVE-2026-90415",
"initial_release_date": "2026-09-19T01:21:54.000Z",
"product_status:fixed": "1",
"product_status:known_affected": "2",
"product_status:under_investigation": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "RDMA/cxgb4: free STAG index when TPT entry write fails",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-90415.json",
"version": "6"
},
"nvd": {
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"versions": [
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{
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"versionType": "semver"
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{
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"version": "5.10.270",
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{
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},
{
"lessThanOrEqual": "6.1.*",
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},
{
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},
{
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"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": "*",
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}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: free STAG index when TPT entry write fails\n\nwrite_tpt_entry() allocates a new STAG index with c4iw_get_resource() and\nbumps stats.stag.cur before programming the entry. When\nwrite_adapter_mem() fails, it returns the error without releasing the index\nor reversing the statistic. No MR is inserted into rhp-\u003emrs, so\nderegistration never reclaims it, leaking the index until device teardown.\n\nRecord whether this call allocated the index and, on a failed write, return\nit to tpt_table and decrement stats.stag.cur. Key the rollback on both the\nwrite error and that flag, not the error alone: a non-reset update carries\na caller-owned STAG that this call did not allocate and must not free."
}
],
"id": "CVE-2026-90415",
"lastModified": "2026-10-19T09:19:35.813",
"metrics": {},
"published": "2026-09-17T17:17:45.647",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/2f17ca7ab5269ac2504e1039c3921373dccd7712"
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"url": "https://git.kernel.org/stable/c/8f6976d635d190e3d7af7103daaa581cf1ccc12e"
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"url": "https://git.kernel.org/stable/c/9eeafcda1d6c11f0eec532243c4e96ec8c632bd7"
},
{
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},
{
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{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/fdfb5cea4bf070cdb31d997efd87bb684df041fd"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-10-05T18:59:32+00:00",
"cve": "CVE-2026-90415",
"id": "CVE-2026-90415",
"initial_release_date": "2026-09-17T00:00:00+00:00",
"product_status:known_affected": "277",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: RDMA/cxgb4: free STAG index when TPT entry write fails",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90415.json",
"version": "3"
}
}
}
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