RDMA/uverbs: Add UVERBS_ATTR_UHW to UVERBS_METHOD_REG_MR
In the Linux kernel, the following vulnerability has been resolved: RDMA/uverbs: Add UVERBS_ATTR_UHW to UVERBS_METHOD_REG_MR The original commit missed that three drivers (mthca, irdma, siw) have UHW data associated with reg_mr that cannot be passed through the ioctl. They also assume that the udata cannot be NULL, so failing to pass a valid udata can trigger a NULL udata crash in those drivers. This never happens in real systems since in rdma-core ibv_cmd_reg_mr_ex() does not accept a udata and those three drivers don't use it, however a malicious userspace could trigger it.
CVE-2026-89506
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89506
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5b2e45049dc06a876bc6b138218ddeb0814502ef",
"lessThan": "71d5c41ac583df09a7c32199bef7d42de7267d07",
"versionType": "git"
},
{
"status": "affected",
"version": "5b2e45049dc06a876bc6b138218ddeb0814502ef",
"lessThan": "9e71d0f4944ba5641e01db29b3256c963656d671",
"versionType": "git"
},
{
"status": "affected",
"version": "5b2e45049dc06a876bc6b138218ddeb0814502ef",
"lessThan": "011199f46f44a9fd93a9e5ab5d7fd1328d80e9bf",
"versionType": "git"
}
],
"programFiles": [
"drivers/infiniband/core/uverbs_std_types_mr.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/infiniband/core/uverbs_std_types_mr.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89506
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #35033 · Revision 1
- Added to Heist Feed
- Publisher date