IB/IPoIB: Avoid restoring OPER_UP after multicast flush
In the Linux kernel, the following vulnerability has been resolved: IB/IPoIB: Avoid restoring OPER_UP after multicast flush ipoib_ib_dev_flush_light() temporarily clears IPOIB_FLAG_OPER_UP to prevent multicast joins while ipoib_mcast_dev_flush() is running, and restores the flag afterwards if it was previously set. This restore races with ipoib_ib_dev_down(). If the interface is brought down while the flush is in progress, ipoib_ib_dev_down() clears IPOIB_FLAG_OPER_UP, but the flush path may set it again after the device has already gone down. Since commit 894021a75291 ("IB/ipoib: Make the carrier_on_task race aware"), ipoib_mcast_carrier_on_task() relies on IPOIB_FLAG_OPER_UP being cleared to terminate its rtnl_trylock() retry loop. If the flag is left set after shutdown, the workqueue retries forever, causing teardown to deadlock when ipoib_ndo_uninit() waits in destroy_workqueue() while holding RTNL. Instead of overloading IPOIB_FLAG_OPER_UP to block multicast joins during a light flush, introduce a dedicated IPOIB_FLAG_MCAST_FLUSH flag. Use it together with IPOIB_FLAG_OPER_UP to determine whether multicast joins are allowed, avoiding the race with device shutdown.
CVE-2026-98347
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-2026-98347
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": "344bacca8cd811809fc33a249f2738ab757d327f",
"lessThan": "f973769fb7cb33ba0d4a64b7dcfee0cabaead938",
"versionType": "git"
},
{
"status": "affected",
"version": "344bacca8cd811809fc33a249f2738ab757d327f",
"lessThan": "b72f38929f4b5aa83161fd3b22a7327207e51ec5",
"versionType": "git"
},
{
"status": "affected",
"version": "344bacca8cd811809fc33a249f2738ab757d327f",
"lessThan": "1b11e4b55b41d9e69a8e8d07622614202e2eaca9",
"versionType": "git"
},
{
"status": "affected",
"version": "344bacca8cd811809fc33a249f2738ab757d327f",
"lessThan": "326f7d34bd7e64de535566b65c0533b640df5a81",
"versionType": "git"
},
{
"status": "affected",
"version": "344bacca8cd811809fc33a249f2738ab757d327f",
"lessThan": "5ad925d45f28464a5e043c9620880bb6a030da89",
"versionType": "git"
},
{
"status": "affected",
"version": "344bacca8cd811809fc33a249f2738ab757d327f",
"lessThan": "188b334a6db36a8e0bfaaf59bc4020639a0f3aad",
"versionType": "git"
},
{
"status": "affected",
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"lessThan": "1ff3add37c329704ec46181b4ae4f00f9f16ce6f",
"versionType": "git"
},
{
"status": "affected",
"version": "344bacca8cd811809fc33a249f2738ab757d327f",
"lessThan": "9a141d3dc869d18b2eab35e999f4790a9b84e40f",
"versionType": "git"
},
{
"status": "affected",
"version": "a289c65ca49d2680a3d797e633e57a45573d1df2",
"versionType": "git"
},
{
"status": "affected",
"version": "b81459c78935e4579a577b2366c5f8878d3c7fee",
"versionType": "git"
},
{
"status": "affected",
"version": "8a9d8dc9ce83a90bfbbe69181acc4cf1beff46f5",
"versionType": "git"
},
{
"status": "affected",
"version": "dfe809702a11bd7fb91c882fb55620e39ce22109",
"versionType": "git"
},
{
"status": "affected",
"version": "87160fb51bc343793cc8f5f031a87f1a35aecb82",
"versionType": "git"
},
{
"status": "affected",
"version": "749fd55dd210f9676f0d445a6efaaa3bec65174a",
"versionType": "git"
},
{
"status": "affected",
"version": "3.2.84",
"lessThan": "3.3",
"versionType": "semver"
},
{
"status": "affected",
"version": "3.10.105",
"lessThan": "3.11",
"versionType": "semver"
},
{
"status": "affected",
"version": "3.12.65",
"lessThan": "3.13",
"versionType": "semver"
},
{
"status": "affected",
"version": "3.16.39",
"lessThan": "3.17",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.4.24",
"lessThan": "4.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.7.7",
"lessThan": "4.8",
"versionType": "semver"
}
],
"programFiles": [
"drivers/infiniband/ulp/ipoib/ipoib.h",
"drivers/infiniband/ulp/ipoib/ipoib_ib.c",
"drivers/infiniband/ulp/ipoib/ipoib_multicast.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/infiniband/ulp/ipoib/ipoib.h",
"drivers/infiniband/ulp/ipoib/ipoib_ib.c",
"drivers/infiniband/ulp/ipoib/ipoib_multicast.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98347
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38426 · Revision 1
- Added to Heist Feed
- Publisher date