CVE-2026-90219
RDMA/cxgb4: Free debugfs on registration failure
Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: Free debugfs on registration failure c4iw_alloc() creates the per-device debugfs tree (dev->debugfs_root via setup_debugfs()), but it is removed only in c4iw_remove(), not in c4iw_dealloc(). When RDMA device registration fails, the registration worker's err_dealloc_ctx path calls c4iw_dealloc() directly, bypassing c4iw_remove(), so the debugfs dentries leak and outlive the freed c4iw_dev. Move debugfs_remove_recursive() into c4iw_dealloc() so every path that frees ctx->dev also removes its debugfs tree.
INFO
Published Date :
Sept. 17, 2026, 5:17 p.m.
Last Modified :
Sept. 17, 2026, 5:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Move debugfs_remove_recursive() to c4iw_dealloc().
- Ensure debugfs tree is removed on registration failure.
- Remove debugfs dentries on freed c4iw_dev.
References to Advisories, Solutions, and Tools
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CVE-2026-90219.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-90219 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-2026-90219
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).
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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
Sep. 17, 2026
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: Free debugfs on registration failure c4iw_alloc() creates the per-device debugfs tree (dev->debugfs_root via setup_debugfs()), but it is removed only in c4iw_remove(), not in c4iw_dealloc(). When RDMA device registration fails, the registration worker's err_dealloc_ctx path calls c4iw_dealloc() directly, bypassing c4iw_remove(), so the debugfs dentries leak and outlive the freed c4iw_dev. Move debugfs_remove_recursive() into c4iw_dealloc() so every path that frees ctx->dev also removes its debugfs tree. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/90xxx/CVE-2026-90219.json">CVE-2026-90219</a> Added Reference https://git.kernel.org/stable/c/046425412529dbfca1433c8bef5641b271b4ab2a Added Reference https://git.kernel.org/stable/c/459b59f7ed56511d6529311cb4e5e482ebfcfb8e Added Reference https://git.kernel.org/stable/c/479a7f90060e62bdd9bb4036ec0a70bf460f6d23 Added Reference https://git.kernel.org/stable/c/c332d9e7dce234d8bef78271d003a68ee943b61b Added Reference https://git.kernel.org/stable/c/cd60992f09b7e83bfd3c76e3bb06b29f3e2fa0a8 Added Reference https://git.kernel.org/stable/c/ea41b5630fa3d9877ce9ed8832cf5575f742bfbb Added Reference https://git.kernel.org/stable/c/f98e894ec029a752cf9c7f7834741bead0fb463d Added Reference https://git.kernel.org/stable/c/fe5c16bb6252dea6025b748257ddc3b2665495b0