CVE-2026-74334
RDMA/nldev: Fix locking when accessing mr->pd
Description
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.
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Sept. 14, 2026, 12:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel to the latest patched version.
- Verify system integrity after applying updates.
- Apply vendor-provided patches for RDMA/nldev.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-74334.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74334 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-74334
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-74334 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74334 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 14, 2026
Action Type Old Value New Value Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/74xxx/CVE-2026-74334.json">CVE-2026-74334</a> Added Reference https://git.kernel.org/stable/c/05e26f34597e9c38bb5b340d86b179b23673869f Added Reference https://git.kernel.org/stable/c/1a132ee4e655288d9a0937ea5109a0d038431ae9 Added Reference https://git.kernel.org/stable/c/50d5c02ab8e62325548bd3a6e6b758a9dcd6e7c3 Added Reference https://git.kernel.org/stable/c/7a0cbb5721a1da81e902d73b6049f85ca8f3fc0a Added Reference https://git.kernel.org/stable/c/845c6b355226195dad1f26b300c4830f57034e8b Added Reference https://git.kernel.org/stable/c/a07cba1296aaa81bf9b914486ca957aaff196247 Removed Reference https://git.kernel.org/stable/c/1a132ee4e655288d9a0937ea5109a0d038431ae9 Removed Reference https://git.kernel.org/stable/c/50d5c02ab8e62325548bd3a6e6b758a9dcd6e7c3 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'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': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', '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'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'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': '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'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'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': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', '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'}] Added Description 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. Added Reference https://git.kernel.org/stable/c/1a132ee4e655288d9a0937ea5109a0d038431ae9 Added Reference https://git.kernel.org/stable/c/50d5c02ab8e62325548bd3a6e6b758a9dcd6e7c3