RDMA/nldev: Fix locking when accessing mr->pd
In the Linux kernel, the following vulnerability has been resolved: RDMA/nldev: Fix locking when accessing mr->pd Sashiko points out that, due to rereg_mr, the PD is actually variable and all the touches in nldev are racy. Use mr->device instead of mr->pd->device. Getting the PD restrack ID is more tricky. To avoid disturbing all the happy paths, add an rdma_restrack_sync() operation which is sort of like flush_workqueue() or synchronize_irq(): after it returns, all the old nldev touches to the mr are gone and everything sees the new PD. This makes it safe to reach into the PD pointer.
CVE-2026-74334
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-2026-74334
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": "da5c8507821573b8ed6e3f47e009f273493ffaf7",
"lessThan": "845c6b355226195dad1f26b300c4830f57034e8b",
"versionType": "git"
},
{
"status": "affected",
"version": "da5c8507821573b8ed6e3f47e009f273493ffaf7",
"lessThan": "7a0cbb5721a1da81e902d73b6049f85ca8f3fc0a",
"versionType": "git"
},
{
"status": "affected",
"version": "da5c8507821573b8ed6e3f47e009f273493ffaf7",
"lessThan": "05e26f34597e9c38bb5b340d86b179b23673869f",
"versionType": "git"
},
{
"status": "affected",
"version": "da5c8507821573b8ed6e3f47e009f273493ffaf7",
"lessThan": "a07cba1296aaa81bf9b914486ca957aaff196247",
"versionType": "git"
},
{
"status": "affected",
"version": "da5c8507821573b8ed6e3f47e009f273493ffaf7",
"lessThan": "1a132ee4e655288d9a0937ea5109a0d038431ae9",
"versionType": "git"
},
{
"status": "affected",
"version": "da5c8507821573b8ed6e3f47e009f273493ffaf7",
"lessThan": "50d5c02ab8e62325548bd3a6e6b758a9dcd6e7c3",
"versionType": "git"
}
],
"programFiles": [
"drivers/infiniband/core/nldev.c",
"drivers/infiniband/core/restrack.c",
"drivers/infiniband/core/restrack.h",
"drivers/infiniband/core/uverbs_cmd.c",
"include/rdma/ib_verbs.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.18",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/infiniband/core/nldev.c",
"drivers/infiniband/core/restrack.c",
"drivers/infiniband/core/restrack.h",
"drivers/infiniband/core/uverbs_cmd.c",
"include/rdma/ib_verbs.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74334
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33103 · Revision 1
- Added to Heist Feed
- Publisher date