CVE-2026-90219

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux49ea0c036ede81f126f1a9389d377999fdf5c5a1 < 459b59f7ed56511d6529311cb4e5e482ebfcfb8eaffected
LinuxLinux49ea0c036ede81f126f1a9389d377999fdf5c5a1 < cd60992f09b7e83bfd3c76e3bb06b29f3e2fa0a8affected
LinuxLinux49ea0c036ede81f126f1a9389d377999fdf5c5a1 < c332d9e7dce234d8bef78271d003a68ee943b61baffected
LinuxLinux49ea0c036ede81f126f1a9389d377999fdf5c5a1 < f98e894ec029a752cf9c7f7834741bead0fb463daffected
LinuxLinux49ea0c036ede81f126f1a9389d377999fdf5c5a1 < 479a7f90060e62bdd9bb4036ec0a70bf460f6d23affected
LinuxLinux49ea0c036ede81f126f1a9389d377999fdf5c5a1 < 046425412529dbfca1433c8bef5641b271b4ab2aaffected
LinuxLinux49ea0c036ede81f126f1a9389d377999fdf5c5a1 < ea41b5630fa3d9877ce9ed8832cf5575f742bfbbaffected
LinuxLinux49ea0c036ede81f126f1a9389d377999fdf5c5a1 < fe5c16bb6252dea6025b748257ddc3b2665495b0affected
LinuxLinux98fa991017981b52dcc4dc3924fc8e1e83e41bf4affected
LinuxLinuxaf92e4a595e006b498c44b617ea38f697eca3469affected
LinuxLinux9c0cec79e5c914662c2cf98b4a729c0fcc8c872eaffected
LinuxLinux4.19.130 < 4.20affected
LinuxLinux5.4.49 < 5.5affected
LinuxLinux5.7.6 < 5.8affected
LinuxLinux5.8affected
LinuxLinux0 < 5.8unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References