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:
1. A warning that the lock is being unlocked when no one holds it.
2. An incorrect unlock of a lock that belongs to another thread.
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/20260116184150.3013258-1-kbusch@meta.com]
References
Configurations
Configuration 1 (hide)
|
History
11 May 2026, 19:58
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/0425aaf20b407d2f2cf3bf469808e4a35f9abb8b - Patch | |
| References | () https://git.kernel.org/stable/c/8b08ea9690b212b7bf7f12414039259cf34b1aa0 - Patch | |
| References | () https://git.kernel.org/stable/c/9368d1ee62829b08aa31836b3ca003803caf0b72 - Patch | |
| References | () https://git.kernel.org/stable/c/943ed56606a7ab2fe5a99cad572dd17d484310c7 - Patch | |
| References | () https://git.kernel.org/stable/c/a19b61fdb958ffadbba85b43c991eb9fc70c1c1c - Patch | |
| References | () https://git.kernel.org/stable/c/bd435f4b738130d732ef64e0e57e45185f77165d - Patch | |
| References | () https://git.kernel.org/stable/c/ebb27b7399ab8b9eb1f792b329aa5f6250c590d4 - Patch | |
| References | () https://git.kernel.org/stable/c/fbe06a3058114bf95a17a4941b205f4b321c6f0a - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CWE | CWE-667 | |
| First Time |
Linux linux Kernel
Linux |
08 May 2026, 13:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
06 May 2026, 12:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-06 12:16
Updated : 2026-05-11 19:58
NVD link : CVE-2026-43211
Mitre link : CVE-2026-43211
CVE.ORG link : CVE-2026-43211
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-667
Improper Locking