RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() Sashiko points out the radix_tree itself is RCU safe, but nothing ever frees the mlx4_srq struct with RCU, and it isn't even accessed within the RCU critical section. It also will crash if an event is delivered before the srq object is finished initializing. Use the spinlock since it isn't easy to make RCU work, use refcount_inc_not_zero() to protect against partially initialized objects, and order the refcount_set() to be after the srq is fully initialized.
CVE-2026-46181
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-2026-46181
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": "30353bfc43a1602c020f31d95cf27182ffd23824",
"lessThan": "2d8b30b496bc53e961ba7415fd629fc27813017c",
"versionType": "git"
},
{
"status": "affected",
"version": "30353bfc43a1602c020f31d95cf27182ffd23824",
"lessThan": "f0dbd9355ce1e93808541260c7ffab7956df9233",
"versionType": "git"
},
{
"status": "affected",
"version": "30353bfc43a1602c020f31d95cf27182ffd23824",
"lessThan": "1e2a44875b6afb4add1115f7f3351dcbeb6f273d",
"versionType": "git"
},
{
"status": "affected",
"version": "30353bfc43a1602c020f31d95cf27182ffd23824",
"lessThan": "8b7833f3bce35cb0d01c1503781523c099c675f0",
"versionType": "git"
},
{
"status": "affected",
"version": "30353bfc43a1602c020f31d95cf27182ffd23824",
"lessThan": "c9341307ea16b9395c2e4c9c94d8499d91fe31d0",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ethernet/mellanox/mlx4/srq.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.9",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.30",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.7",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/ethernet/mellanox/mlx4/srq.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46181
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46334 · Revision 1
- Added to Heist Feed
- Publisher date