xprtrdma: Fix ep kref imbalance on ADDR_CHANGE
In the Linux kernel, the following vulnerability has been resolved: xprtrdma: Fix ep kref imbalance on ADDR_CHANGE rpcrdma_cm_event_handler() falls through to the disconnected: label on RDMA_CM_EVENT_ADDR_CHANGE and calls rpcrdma_ep_put() with no matching get when the event arrives before RDMA_CM_EVENT_ESTABLISHED. The kref then underflows during connect teardown and rpcrdma_xprt_disconnect() operates on a freed ep. Reference counts across a normal connection lifecycle: rpcrdma_ep_create() kref_init ->1 rpcrdma_xprt_connect() ep_get ->2 (before post_recvs) RDMA_CM_EVENT_ESTABLISHED ep_get ->3 RDMA_CM_EVENT_DISCONNECTED ep_put ->2 rpcrdma_xprt_drain() ep_put ->1 rpcrdma_xprt_disconnect() tail ep_put ->0 (ep_destroy) The connect-time get in rpcrdma_xprt_connect(), taken just before rpcrdma_post_recvs() "while there are outstanding Receives," is balanced by rpcrdma_xprt_drain. ADDR_CHANGE before ESTABLISHED has no get to consume, so its put drops the count to 1 and the drain put then frees the ep while rpcrdma_xprt_disconnect() still holds a pointer to it. Fix by dispatching on the prior re_connect_status via xchg(): for prev == 0 (pre-ESTABLISHED) wake the connect waiter and return with no put; for prev == 1 call rpcrdma_force_disconnect() and return. The case-1 arm relies on the subsequent RDMA_CM_EVENT_DISCONNECTED event -- reliably delivered when rdma_disconnect() is called on a still-connected cm_id -- to balance the ESTABLISHED get; rpcrdma_xprt_drain() continues to balanc
CVE-2026-72469
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-2026-72469
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": "2acc5cae292355f5f18ad377a2a966e7f03c8fec",
"lessThan": "a562485c359d0b20a99d466b042af9c2f7ff3326",
"versionType": "git"
},
{
"status": "affected",
"version": "2acc5cae292355f5f18ad377a2a966e7f03c8fec",
"lessThan": "cfd1bab66b042da7a778786685125656c695931b",
"versionType": "git"
},
{
"status": "affected",
"version": "2acc5cae292355f5f18ad377a2a966e7f03c8fec",
"lessThan": "d0479c2b12974aa188b10d221a5770126b118b6d",
"versionType": "git"
},
{
"status": "affected",
"version": "2acc5cae292355f5f18ad377a2a966e7f03c8fec",
"lessThan": "ffc07790539736a5d029f6a3c966b46c529f93a8",
"versionType": "git"
},
{
"status": "affected",
"version": "2acc5cae292355f5f18ad377a2a966e7f03c8fec",
"lessThan": "af9b65b29af341932625c4283dc7a23cdb62688a",
"versionType": "git"
},
{
"status": "affected",
"version": "2fcbf07a4f23174a45e015b62a8e42ddbc2e53ef",
"versionType": "git"
},
{
"status": "affected",
"version": "5.7.9",
"lessThan": "5.8",
"versionType": "semver"
}
],
"programFiles": [
"net/sunrpc/xprtrdma/verbs.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"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": [
"net/sunrpc/xprtrdma/verbs.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-72469
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46525 · Revision 1
- Added to Heist Feed
- Publisher date