net: mvneta: re-enable percpu interrupt on resume
In the Linux kernel, the following vulnerability has been resolved: net: mvneta: re-enable percpu interrupt on resume On Marvell MPIC platforms (Armada 370/XP/38x), mvneta uses a percpu IRQ disable/enable scheme for NAPI: the ISR (mvneta_percpu_isr) calls disable_percpu_irq() to mask the MPIC per-CPU interrupt and schedules NAPI poll, which calls enable_percpu_irq() on completion to unmask. If suspend occurs while NAPI poll is pending (between disable_percpu_irq in the ISR and enable_percpu_irq in poll completion), the interrupt is never re-enabled: 1. mvneta_percpu_isr: disable_percpu_irq() + napi_schedule() => MPIC masked, percpu_enabled cpumask bit cleared 2. NAPI poll does not complete before suspend proceeds (on PREEMPT_RT this is highly likely since softirqs run in ksoftirqd which gets frozen; on non-RT it can happen when softirq processing is deferred to ksoftirqd) 3. mvneta_stop_dev => napi_disable(): cancels the pending poll without executing the completion path 4. suspend_device_irqs => IRQCHIP_MASK_ON_SUSPEND: masks MPIC (already masked, but records IRQS_SUSPENDED) 5. Resume: mpic_resume checks irq_percpu_is_enabled() => false (bit was cleared in step 1) => skips unmask 6. mvneta_start_dev only restores device-level INTR_NEW_MASK, does not touch the MPIC per-CPU mask Result: MPIC per-CPU interrupt stays masked permanently. The NIC generates interrupts (INTR_NEW_CAUSE != 0) but the CPU never receives them, causing complete loss of network connectivity. Fix by callin
CVE-2026-72409
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-2026-72409
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": "12bb03b436dad56692e9a103ed26156156bef5d2",
"lessThan": "bf88cd3b649bc3e638f1e8a77649581852747a68",
"versionType": "git"
},
{
"status": "affected",
"version": "12bb03b436dad56692e9a103ed26156156bef5d2",
"lessThan": "8c7a489aa71d2693752b2e794a68bf672d16c829",
"versionType": "git"
},
{
"status": "affected",
"version": "12bb03b436dad56692e9a103ed26156156bef5d2",
"lessThan": "82c13027ed283b856017adee970dbfdffce5c6b8",
"versionType": "git"
},
{
"status": "affected",
"version": "12bb03b436dad56692e9a103ed26156156bef5d2",
"lessThan": "be626ac1faadd49c2cead9f9cd06ba8752d81563",
"versionType": "git"
},
{
"status": "affected",
"version": "12bb03b436dad56692e9a103ed26156156bef5d2",
"lessThan": "1cc312dc8bc78fa24c80d5bc193dbf5b57a99cc6",
"versionType": "git"
},
{
"status": "affected",
"version": "12bb03b436dad56692e9a103ed26156156bef5d2",
"lessThan": "b84dd48f9da1eb132bdc06a944423cd5a1641ef1",
"versionType": "git"
},
{
"status": "affected",
"version": "12bb03b436dad56692e9a103ed26156156bef5d2",
"lessThan": "5bdb33ff6e58bdc43632e98b30723eb65352d671",
"versionType": "git"
},
{
"status": "affected",
"version": "12bb03b436dad56692e9a103ed26156156bef5d2",
"lessThan": "fd398d6480987e4c84fff0aaab6b9d6642a93343",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ethernet/marvell/mvneta.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/ethernet/marvell/mvneta.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-72409
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33044 · Revision 1
- Added to Heist Feed
- Publisher date