{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"MEDIUM" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"PCI/IOV: Add PCI rescan-remove locking when enabling/disabling SR-IOV\"\n\nThis reverts commit 05703271c3cd (\"PCI/IOV: Add PCI rescan-remove locking\nwhen enabling/disabling SR-IOV\"), which causes a deadlock by recursively\ntaking pci_rescan_remove_lock when sriov_del_vfs() is called as part of\npci_stop_and_remove_bus_device(). For example with the following sequence\nof commands:\n\n $ echo > /sys/bus/pci/devices//sriov_numvfs\n $ echo 1 > /sys/bus/pci/devices//remove\n\nA trimmed trace of the deadlock on a mlx5 device is as below:\n\n zsh/5715 is trying to acquire lock:\n 000002597926ef50 (pci_rescan_remove_lock){+.+.}-{3:3}, at: sriov_disable+0x34/0x140\n\n but task is already holding lock:\n 000002597926ef50 (pci_rescan_remove_lock){+.+.}-{3:3}, at: pci_stop_and_remove_bus_device_locked+0x24/0x80\n ...\n Call Trace:\n [<00000259778c4f90>] dump_stack_lvl+0xc0/0x110\n [<00000259779c844e>] print_deadlock_bug+0x31e/0x330\n [<00000259779c1908>] __lock_acquire+0x16c8/0x32f0\n [<00000259779bffac>] lock_acquire+0x14c/0x350\n [<00000259789643a6>] __mutex_lock_common+0xe6/0x1520\n [<000002597896413c>] mutex_lock_nested+0x3c/0x50\n [<00000259784a07e4>] sriov_disable+0x34/0x140\n [<00000258f7d6dd80>] mlx5_sriov_disable+0x50/0x80 [mlx5_core]\n [<00000258f7d5745e>] remove_one+0x5e/0xf0 [mlx5_core]\n [<00000259784857fc>] pci_device_remove+0x3c/0xa0\n [<000002597851012e>] device_release_driver_internal+0x18e/0x280\n [<000002597847ae22>] pci_stop_bus_device+0x82/0xa0\n [<000002597847afce>] pci_stop_and_remove_bus_device_locked+0x5e/0x80\n [<00000259784972c2>] remove_store+0x72/0x90\n [<0000025977e6661a>] kernfs_fop_write_iter+0x15a/0x200\n [<0000025977d7241c>] vfs_write+0x24c/0x300\n [<0000025977d72696>] ksys_write+0x86/0x110\n [<000002597895b61c>] __do_syscall+0x14c/0x400\n [<000002597896e0ee>] system_call+0x6e/0x90\n\nThis alone is not a complete fix as it restores the issue the cited commit\ntried to solve. A new fix will be provided as a follow on.", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43147" }, { "summary":"CVE-2026-43147 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2026/csaf-openeuler-cve-2026-43147.json" }, { "summary":"openEuler-SA-2026-2418", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2418" }, { "summary":"CVE-2026-43147", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-43147&packageName=kernel" } ], "title":"openEuler cve CVE-2026-43147", "tracking":{ "initial_release_date":"2026-05-25T10:43:01+08:00", "revision_history":[ { "date":"2026-05-25T10:43:01+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-05-25T10:43:01+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" 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locking when enabling/disabling SR-IOV\"\n\nThis reverts commit 05703271c3cd (\"PCI/IOV: Add PCI rescan-remove locking\nwhen enabling/disabling SR-IOV\"), which causes a deadlock by recursively\ntaking pci_rescan_remove_lock when sriov_del_vfs() is called as part of\npci_stop_and_remove_bus_device(). For example with the following sequence\nof commands:\n\n $ echo > /sys/bus/pci/devices//sriov_numvfs\n $ echo 1 > /sys/bus/pci/devices//remove\n\nA trimmed trace of the deadlock on a mlx5 device is as below:\n\n zsh/5715 is trying to acquire lock:\n 000002597926ef50 (pci_rescan_remove_lock){+.+.}-{3:3}, at: sriov_disable+0x34/0x140\n\n but task is already holding lock:\n 000002597926ef50 (pci_rescan_remove_lock){+.+.}-{3:3}, at: pci_stop_and_remove_bus_device_locked+0x24/0x80\n ...\n Call Trace:\n [<00000259778c4f90>] dump_stack_lvl+0xc0/0x110\n [<00000259779c844e>] print_deadlock_bug+0x31e/0x330\n [<00000259779c1908>] __lock_acquire+0x16c8/0x32f0\n [<00000259779bffac>] lock_acquire+0x14c/0x350\n [<00000259789643a6>] __mutex_lock_common+0xe6/0x1520\n [<000002597896413c>] mutex_lock_nested+0x3c/0x50\n [<00000259784a07e4>] sriov_disable+0x34/0x140\n [<00000258f7d6dd80>] mlx5_sriov_disable+0x50/0x80 [mlx5_core]\n [<00000258f7d5745e>] remove_one+0x5e/0xf0 [mlx5_core]\n [<00000259784857fc>] pci_device_remove+0x3c/0xa0\n [<000002597851012e>] device_release_driver_internal+0x18e/0x280\n [<000002597847ae22>] pci_stop_bus_device+0x82/0xa0\n [<000002597847afce>] pci_stop_and_remove_bus_device_locked+0x5e/0x80\n [<00000259784972c2>] remove_store+0x72/0x90\n [<0000025977e6661a>] kernfs_fop_write_iter+0x15a/0x200\n [<0000025977d7241c>] vfs_write+0x24c/0x300\n [<0000025977d72696>] ksys_write+0x86/0x110\n [<000002597895b61c>] __do_syscall+0x14c/0x400\n [<000002597896e0ee>] system_call+0x6e/0x90\n\nThis alone is not a complete fix as it restores the issue the cited commit\ntried to solve. A new fix will be provided as a follow on.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":{ "$ref":"$.vulnerabilities[0].product_status.fixed" } }, "remediations":[ { "product_ids":{ "$ref":"$.vulnerabilities[0].product_status.fixed" }, "details":"kernel security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2418" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"MEDIUM", "baseScore":5.5, "vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version":"3.1" }, "products":{ "$ref":"$.vulnerabilities[0].product_status.fixed" } } ], "threats":[ { "details":"Medium", "category":"impact" } ], "title":"CVE-2026-43147" } ] }