CVE-2026-43211High· 7.8▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: PCI: Fix pci_slot_trylock() error handling Commit a4e772898f8b ("PCI: Add missing bridge lock to pci_bus_lock()") delegates the bridge device's pci_dev_trylock() to pc…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
In the Linux kernel, the following vulnerability has been resolved:
PCI: Fix pci_slot_trylock() error handling
Commit a4e772898f8b ("PCI: Add missing bridge lock to pci_bus_lock()") delegates the bridge device's pci_dev_trylock() to pci_bus_trylock() in pci_slot_trylock(), but it forgets to remove the corresponding pci_dev_unlock() when pci_bus_trylock() fails.
Before a4e772898f8b, the code did:
if (!pci_dev_trylock(dev)) /* <- lock bridge device / goto unlock; if (dev->subordinate) { if (!pci_bus_trylock(dev->subordinate)) { pci_dev_unlock(dev); / <- unlock bridge device */ goto unlock; } }
After a4e772898f8b the bridge-device lock is no longer taken, but the pci_dev_unlock(dev) on the failure path was left in place, leading to the bug.
This yields one of two errors:
Fix it by removing the now-redundant pci_dev_unlock(dev) on the failure path.
[Same patch later posted by Keith at https://patch.msgid.link/[email protected]]
Linux >= e2355d513b89a2cb511b4ded0deb426cdb01acd0 < ebb27b7399ab8b9eb1f792b329aa5f6250c590d4Linux >= 04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945 < fbe06a3058114bf95a17a4941b205f4b321c6f0aLinux >= 7253b4fed46471cc247c6cacefac890a8472c083 < 943ed56606a7ab2fe5a99cad572dd17d484310c7Linux >= 78c6e39fef5c428960aff742149bba302dd46f5a < a19b61fdb958ffadbba85b43c991eb9fc70c1c1cLinux >= a4e772898f8bf2e7e1cf661a12c60a5612c4afab < 0425aaf20b407d2f2cf3bf469808e4a35f9abb8bLinux >= a4e772898f8bf2e7e1cf661a12c60a5612c4afab < bd435f4b738130d732ef64e0e57e45185f77165dLinux >= a4e772898f8bf2e7e1cf661a12c60a5612c4afab < 8b08ea9690b212b7bf7f12414039259cf34b1aa0Linux >= a4e772898f8bf2e7e1cf661a12c60a5612c4afab < 9368d1ee62829b08aa31836b3ca003803caf0b72Linux 0790b89c7e911003b8c50ae50e3ac7645de1fae9Linux df77a678c33871a6e4ac5b54a71662f1d702335bLinux 81c68e218ab883dfa368460a59b674084c0240daLinux >= 5.10.226 < 5.10.252Linux >= 5.15.167 < 5.15.202Linux >= 6.1.110 < 6.1.165Linux >= 6.6.51 < 6.6.128Linux >= 4.19.322 < 4.20Linux >= 5.4.284 < 5.5Linux >= 6.10.10 < 6.11Linux 6.11Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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