{"id":"CVE-2026-74397","title":"IB/mlx5: Fix transport-domain rollback and initialize lb mutex earlier","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nIB/mlx5: Fix transport-domain rollback and initialize lb mutex earlier\n\nmlx5_ib_alloc_transport_domain() allocates a transport domain and then\nmay fail in mlx5_ib_enabl…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 146d2f1af3245a10b13eef263687e54f4e253d1d < 2c3b2667dad69d56774b79db763acb3a1bee0fc0","Linux >= 146d2f1af3245a10b13eef263687e54f4e253d1d < 37fc3cc0f924fd8d0f0cf87b92672dec75a32e57","Linux >= 146d2f1af3245a10b13eef263687e54f4e253d1d < 65e344925fa30abf50c8de8c150b397715fa2066","Linux >= 146d2f1af3245a10b13eef263687e54f4e253d1d < f88e12c95fc19f719e06ca1e9eb20fdad68ef61a","Linux >= 146d2f1af3245a10b13eef263687e54f4e253d1d < e79389115b9d27287ff6230a9750675106ed7668","Linux 4.5"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:55:25.351057Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:05:41.192Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74397","references":[{"url":"https://git.kernel.org/stable/c/2c3b2667dad69d56774b79db763acb3a1bee0fc0"},{"url":"https://git.kernel.org/stable/c/37fc3cc0f924fd8d0f0cf87b92672dec75a32e57"},{"url":"https://git.kernel.org/stable/c/65e344925fa30abf50c8de8c150b397715fa2066"},{"url":"https://git.kernel.org/stable/c/f88e12c95fc19f719e06ca1e9eb20fdad68ef61a"},{"url":"https://git.kernel.org/stable/c/e79389115b9d27287ff6230a9750675106ed7668"}],"tags":["cve.org"],"epss":0.00175,"epssPercentile":0.06546,"ingestedAt":"2026-10-16T19:46:24.369Z","slug":"CVE-2026-74397","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nIB/mlx5: Fix transport-domain rollback and initialize lb mutex earlier\n\nmlx5_ib_alloc_transport_domain() allocates a transport domain and then\nmay fail in mlx5_ib_enable_lb(). In that case, the allocated TD is leaked.\n\nFix this by deallocating the TD when mlx5_ib_enable_lb() returns an\nerror. Also return 0 explicitly in the no-loopback-capability success\nbranch, and move dev->lb.mutex initialization to mlx5_ib_stage_init_init().\n\n## Affected\n\n- `Linux >= 146d2f1af3245a10b13eef263687e54f4e253d1d < 2c3b2667dad69d56774b79db763acb3a1bee0fc0`\n- `Linux >= 146d2f1af3245a10b13eef263687e54f4e253d1d < 37fc3cc0f924fd8d0f0cf87b92672dec75a32e57`\n- `Linux >= 146d2f1af3245a10b13eef263687e54f4e253d1d < 65e344925fa30abf50c8de8c150b397715fa2066`\n- `Linux >= 146d2f1af3245a10b13eef263687e54f4e253d1d < f88e12c95fc19f719e06ca1e9eb20fdad68ef61a`\n- `Linux >= 146d2f1af3245a10b13eef263687e54f4e253d1d < e79389115b9d27287ff6230a9750675106ed7668`\n- `Linux 4.5`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}