CVE-2026-74397
IB/mlx5: Fix transport-domain rollback and initialize lb mutex earlier
Description
In the Linux kernel, the following vulnerability has been resolved: IB/mlx5: Fix transport-domain rollback and initialize lb mutex earlier mlx5_ib_alloc_transport_domain() allocates a transport domain and then may fail in mlx5_ib_enable_lb(). In that case, the allocated TD is leaked. Fix this by deallocating the TD when mlx5_ib_enable_lb() returns an error. Also return 0 explicitly in the no-loopback-capability success branch, and move dev->lb.mutex initialization to mlx5_ib_stage_init_init().
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 15, 2026, 6:22 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-74397
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Deallocate transport domain on mlx5_ib_enable_lb() error.
- Return 0 in no-loopback-capability success branch.
- Initialize dev->lb.mutex earlier in mlx5_ib_stage_init_init().
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-2026-74397.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74397 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-2026-74397
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-2026-74397 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74397 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.
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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': '146d2f1af3245a10b13eef263687e54f4e253d1d', 'lessThan': '2c3b2667dad69d56774b79db763acb3a1bee0fc0', 'versionType': 'git'}, {'status': 'affected', 'version': '146d2f1af3245a10b13eef263687e54f4e253d1d', 'lessThan': '37fc3cc0f924fd8d0f0cf87b92672dec75a32e57', 'versionType': 'git'}, {'status': 'affected', 'version': '146d2f1af3245a10b13eef263687e54f4e253d1d', 'lessThan': '65e344925fa30abf50c8de8c150b397715fa2066', 'versionType': 'git'}, {'status': 'affected', 'version': '146d2f1af3245a10b13eef263687e54f4e253d1d', 'lessThan': 'f88e12c95fc19f719e06ca1e9eb20fdad68ef61a', 'versionType': 'git'}, {'status': 'affected', 'version': '146d2f1af3245a10b13eef263687e54f4e253d1d', 'lessThan': 'e79389115b9d27287ff6230a9750675106ed7668', 'versionType': 'git'}], 'programFiles': ['drivers/infiniband/hw/mlx5/main.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.5'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.5', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'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/hw/mlx5/main.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: IB/mlx5: Fix transport-domain rollback and initialize lb mutex earlier mlx5_ib_alloc_transport_domain() allocates a transport domain and then may fail in mlx5_ib_enable_lb(). In that case, the allocated TD is leaked. Fix this by deallocating the TD when mlx5_ib_enable_lb() returns an error. Also return 0 explicitly in the no-loopback-capability success branch, and move dev->lb.mutex initialization to mlx5_ib_stage_init_init(). Added Reference https://git.kernel.org/stable/c/2c3b2667dad69d56774b79db763acb3a1bee0fc0 Added Reference https://git.kernel.org/stable/c/37fc3cc0f924fd8d0f0cf87b92672dec75a32e57 Added Reference https://git.kernel.org/stable/c/65e344925fa30abf50c8de8c150b397715fa2066 Added Reference https://git.kernel.org/stable/c/e79389115b9d27287ff6230a9750675106ed7668 Added Reference https://git.kernel.org/stable/c/f88e12c95fc19f719e06ca1e9eb20fdad68ef61a