eth: bnxt: avoid deadlock when canceling IRQ affinity notifier
In the Linux kernel, the following vulnerability has been resolved: eth: bnxt: avoid deadlock when canceling IRQ affinity notifier Unregistering IRQ affinity notifiers waits for the callback synchronously. bnxt takes the netdev instance lock in the notifier (to restart the queue) and cancels the work under the same lock. This may obviously deadlock. Move the restart to the async service task. The queue restart isn't super time sensitive. Store the new TPH tag, schedule the task. Safely canceling the service task is already ironed out. In bnxt_request_irq() the order of registering notifier, affinity and initial TPH programming has to be inverted. I think it was racy previously since user may trigger an update as soon as notifier is installed. There's a small known gap - if pcie_tph_get_cpu_st() fails at init and the target tag is 0 we may miss programming the entry. This does not seem worth fixing, the code has skip-on-failure all over the place, anyway.
CVE-2026-74745
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-2026-74745
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": [
{
"status": "affected",
"version": "c214410c47d6ec3128143370747d9e388bab21d7",
"lessThan": "d10e73572cda4af7487f82f58a7771f18cf61084",
"versionType": "git"
},
{
"status": "affected",
"version": "c214410c47d6ec3128143370747d9e388bab21d7",
"lessThan": "8b1118fc5a5d2cdc21cc07b5106921ad4f77c544",
"versionType": "git"
},
{
"status": "affected",
"version": "c214410c47d6ec3128143370747d9e388bab21d7",
"lessThan": "51e96fa31f7e7eac2cba8f854e24d36600cc040b",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ethernet/broadcom/bnxt/bnxt.c",
"drivers/net/ethernet/broadcom/bnxt/bnxt.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.10",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/ethernet/broadcom/bnxt/bnxt.c",
"drivers/net/ethernet/broadcom/bnxt/bnxt.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74745
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34305 · Revision 1
- Added to Heist Feed
- Publisher date