PCI: Fix pci_slot_trylock() error handling
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]
CVE-2026-43211
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-43211
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
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"version": "e2355d513b89a2cb511b4ded0deb426cdb01acd0",
"lessThan": "ebb27b7399ab8b9eb1f792b329aa5f6250c590d4",
"versionType": "git"
},
{
"status": "affected",
"version": "04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945",
"lessThan": "fbe06a3058114bf95a17a4941b205f4b321c6f0a",
"versionType": "git"
},
{
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"versionType": "git"
},
{
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"versionType": "git"
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{
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"version": "a4e772898f8bf2e7e1cf661a12c60a5612c4afab",
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{
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{
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"versionType": "git"
},
{
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"lessThan": "9368d1ee62829b08aa31836b3ca003803caf0b72",
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{
"status": "affected",
"version": "0790b89c7e911003b8c50ae50e3ac7645de1fae9",
"versionType": "git"
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{
"status": "affected",
"version": "df77a678c33871a6e4ac5b54a71662f1d702335b",
"versionType": "git"
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{
"status": "affected",
"version": "81c68e218ab883dfa368460a59b674084c0240da",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.226",
"lessThan": "5.10.252",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.167",
"lessThan": "5.15.202",
"versionType": "semver"
},
{
"status": "affected",
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"lessThan": "6.1.165",
"versionType": "semver"
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{
"status": "affected",
"version": "6.6.51",
"lessThan": "6.6.128",
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},
{
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"lessThan": "4.20",
"versionType": "semver"
},
{
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"version": "5.4.284",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.10.10",
"lessThan": "6.11",
"versionType": "semver"
}
],
"programFiles": [
"drivers/pci/pci.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
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"version": "6.11"
},
{
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"version": "0",
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},
{
"status": "unaffected",
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"versionType": "semver",
"lessThanOrEqual": "5.10.*"
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{
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"version": "5.15.202",
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"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.165",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.128",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.75",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.16",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.6",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/pci/pci.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-43211
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40045 · Revision 1
- Added to Heist Feed
- Publisher date