{"id":"CVE-2026-43211","revision":"5890b7e5a0bb4c5dbe58277afe691dbb","records":[{"revision":"5890b7e5a0bb4c5dbe58277afe691dbb","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-43211","aliases":[],"title":"PCI: Fix pci_slot_trylock() error handling","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: Fix pci_slot_trylock() error handling\n\nCommit a4e772898f8b (\"PCI: Add missing bridge lock to pci_bus_lock()\")\ndelegates the bridge device's pci_dev_trylock() to pci_bus_trylock() in\npci_slot_trylock(), but it forgets to remove the corresponding\npci_dev_unlock() when pci_bus_trylock() fails.\n\nBefore a4e772898f8b, the code did:\n\n  if (!pci_dev_trylock(dev)) /* <- lock bridge device */\n    goto unlock;\n  if (dev->subordinate) {\n    if (!pci_bus_trylock(dev->subordinate)) {\n      pci_dev_unlock(dev);   /* <- unlock bridge device */\n      goto unlock;\n    }\n  }\n\nAfter a4e772898f8b the bridge-device lock is no longer taken, but the\npci_dev_unlock(dev) on the failure path was left in place, leading to the\nbug.\n\nThis yields one of two errors:\n\n  1. A warning that the lock is being unlocked when no one holds it.\n  2. An incorrect unlock of a lock that belongs to another thread.\n\nFix it by removing the now-redundant pci_dev_unlock(dev) on the failure\npath.\n\n[Same patch later posted by Keith at\nhttps://patch.msgid.link/20260116184150.3013258-1-kbusch@meta.com]","state":0,"publishedAt":"2026-05-06T11:28:14.423+00:00","modifiedAt":"2026-10-19T19:16:24.271+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/pci/pci.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"e2355d513b89a2cb511b4ded0deb426cdb01acd0\",\n                            \"lessThan\": \"ebb27b7399ab8b9eb1f792b329aa5f6250c590d4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945\",\n                            \"lessThan\": \"fbe06a3058114bf95a17a4941b205f4b321c6f0a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7253b4fed46471cc247c6cacefac890a8472c083\",\n                            \"lessThan\": \"943ed56606a7ab2fe5a99cad572dd17d484310c7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"78c6e39fef5c428960aff742149bba302dd46f5a\",\n                            \"lessThan\": \"a19b61fdb958ffadbba85b43c991eb9fc70c1c1c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a4e772898f8bf2e7e1cf661a12c60a5612c4afab\",\n                            \"lessThan\": \"0425aaf20b407d2f2cf3bf469808e4a35f9abb8b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a4e772898f8bf2e7e1cf661a12c60a5612c4afab\",\n                            \"lessThan\": \"bd435f4b738130d732ef64e0e57e45185f77165d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a4e772898f8bf2e7e1cf661a12c60a5612c4afab\",\n                            \"lessThan\": \"8b08ea9690b212b7bf7f12414039259cf34b1aa0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a4e772898f8bf2e7e1cf661a12c60a5612c4afab\",\n                            \"lessThan\": \"9368d1ee62829b08aa31836b3ca003803caf0b72\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0790b89c7e911003b8c50ae50e3ac7645de1fae9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"df77a678c33871a6e4ac5b54a71662f1d702335b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"81c68e218ab883dfa368460a59b674084c0240da\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5.10.226\",\n                            \"lessThan\": \"5.10.252\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.167\",\n                            \"lessThan\": \"5.15.202\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.110\",\n                            \"lessThan\": \"6.1.165\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.51\",\n                            \"lessThan\": \"6.6.128\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"4.19.322\",\n                            \"lessThan\": \"4.20\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.284\",\n                            \"lessThan\": \"5.5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.10.10\",\n                            \"lessThan\": \"6.11\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/pci/pci.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.11\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.11\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.252\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.202\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.165\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.128\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.75\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.16\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.6\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/ebb27b7399ab8b9eb1f792b329aa5f6250c590d4","https://git.kernel.org/stable/c/fbe06a3058114bf95a17a4941b205f4b321c6f0a","https://git.kernel.org/stable/c/943ed56606a7ab2fe5a99cad572dd17d484310c7","https://git.kernel.org/stable/c/a19b61fdb958ffadbba85b43c991eb9fc70c1c1c","https://git.kernel.org/stable/c/0425aaf20b407d2f2cf3bf469808e4a35f9abb8b","https://git.kernel.org/stable/c/bd435f4b738130d732ef64e0e57e45185f77165d","https://git.kernel.org/stable/c/8b08ea9690b212b7bf7f12414039259cf34b1aa0","https://git.kernel.org/stable/c/9368d1ee62829b08aa31836b3ca003803caf0b72"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43211","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-43211","identifiers":["CVE-2026-43211"]},"retained":false,"historicalAffected":[]}],"coverage":[]}