{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-45973", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-45973", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-05-27T12:18:32.270Z", "updatedAt": "2026-10-21T12:41:08.534Z", "importedAt": "2026-10-24T01:58:14.884Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "RDMA/mlx5: Fix UMR hang in LAG error state unload", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Fix UMR hang in LAG error state unload\n\nDuring firmware reset in LAG mode, a race condition causes the driver\nto hang indefinitely while waiting for UMR completion during device\nunload. See [1].\n\nIn LAG mode the bond device is only registered on the master, so it\nnever sees sys_error events from the slave.\nDuring firmware reset this causes UMR waits to hang forever on unload\nas the slave is dead but the master hasn't entered error state yet, so\nUMR posts succeed but completions never arrive.\n\nFix this by adding a sys_error notifier that gets registered before\nMLX5_IB_STAGE_IB_REG and stays alive until after ib_unregister_device().\nThis ensures error events reach the bond device throughout teardown.\n\n[1]\nCall Trace:\n __schedule+0x2bd/0x760\n schedule+0x37/0xa0\n schedule_preempt_disabled+0xa/0x10\n __mutex_lock.isra.6+0x2b5/0x4a0\n __mlx5_ib_dereg_mr+0x606/0x870 [mlx5_ib]\n ? __xa_erase+0x4a/0xa0\n ? _cond_resched+0x15/0x30\n ? wait_for_completion+0x31/0x100\n ib_dereg_mr_user+0x48/0xc0 [ib_core]\n ? rdmacg_uncharge_hierarchy+0xa0/0x100\n destroy_hw_idr_uobject+0x20/0x50 [ib_uverbs]\n uverbs_destroy_uobject+0x37/0x150 [ib_uverbs]\n __uverbs_cleanup_ufile+0xda/0x140 [ib_uverbs]\n uverbs_destroy_ufile_hw+0x3a/0xf0 [ib_uverbs]\n ib_uverbs_remove_one+0xc3/0x140 [ib_uverbs]\n remove_client_context+0x8b/0xd0 [ib_core]\n disable_device+0x8c/0x130 [ib_core]\n __ib_unregister_device+0x10d/0x180 [ib_core]\n ib_unregister_device+0x21/0x30 [ib_core]\n __mlx5_ib_remove+0x1e4/0x1f0 [mlx5_ib]\n auxiliary_bus_remove+0x1e/0x30\n device_release_driver_internal+0x103/0x1f0\n bus_remove_device+0xf7/0x170\n device_del+0x181/0x410\n mlx5_rescan_drivers_locked.part.10+0xa9/0x1d0 [mlx5_core]\n mlx5_disable_lag+0x253/0x260 [mlx5_core]\n mlx5_lag_disable_change+0x89/0xc0 [mlx5_core]\n mlx5_eswitch_disable+0x67/0xa0 [mlx5_core]\n mlx5_unload+0x15/0xd0 [mlx5_core]\n mlx5_unload_one+0x71/0xc0 [mlx5_core]\n mlx5_sync_reset_reload_work+0x83/0x100 [mlx5_core]\n process_one_work+0x1a7/0x360\n worker_thread+0x30/0x390\n ? create_worker+0x1a0/0x1a0\n kthread+0x116/0x130\n ? kthread_flush_work_fn+0x10/0x10\n ret_from_fork+0x22/0x40", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "921fcf2971a1e8d3b904ba2c2905b96f4ec3d4ad", "status": "affected", "versionType": "git", "lessThan": "33deba9bf5c34335182342588315f3db7dbc56d3" }, { "version": "6b0acf6a94c31efa43fce4edc22413a3390f9c05", "status": "affected", "versionType": "git", "lessThan": "c8fb5c965ac7d0104872a8e4f6451f3bc6328199" }, { "version": "ede132a5cf559f3ab35a4c28bac4f4a6c20334d8", "status": "affected", "versionType": "git", "lessThan": "6d838873da9cb97551d42316967cc82bf8f8031b" }, { "version": "ede132a5cf559f3ab35a4c28bac4f4a6c20334d8", "status": "affected", "versionType": "git", "lessThan": "613f5d4139b6ba801ccd93f9a28943be60d903bc" }, { "version": "ede132a5cf559f3ab35a4c28bac4f4a6c20334d8", "status": "affected", "versionType": "git", "lessThan": "ebc2164a4cd4314503f1a0c8e7aaf76d7e5fa211" }, { "version": "542bd62b7a7f37182c9ef192c2bd25d118c144e4", "status": "affected", "versionType": "git" }, { "version": "6.6.64", "status": "affected", "versionType": "semver", "lessThan": "6.6.160" }, { "version": "6.12.2", "status": "affected", "versionType": "semver", "lessThan": "6.12.75" }, { "version": "6.11.11", "status": "affected", "versionType": "semver", "lessThan": "6.12" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.13", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.13" }, { "version": "6.6.160", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.75", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.14", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "6.19.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.19.*" }, { "version": "7.0", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }