CVE-2026-72469
xprtrdma: Fix ep kref imbalance on ADDR_CHANGE
Description
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 balance only that connect-time get. Any other prior value means teardown is already in flight.
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 17, 2026, 6:19 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Apply the provided kernel patch.
- Update the Linux kernel to a fixed version.
- Recompile the kernel with the patch.
- Test the connection handling logic.
References to Advisories, Solutions, and Tools
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CVE-2026-72469.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72469 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-72469
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-72469 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72469 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'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': '6.12.97', '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-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/sunrpc/xprtrdma/verbs.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'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': '6.12.97', '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'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'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': '6.12.97', '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-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/sunrpc/xprtrdma/verbs.c'], 'defaultStatus': 'affected'}] Added Description 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 balance only that connect-time get. Any other prior value means teardown is already in flight. Added Reference https://git.kernel.org/stable/c/af9b65b29af341932625c4283dc7a23cdb62688a Added Reference https://git.kernel.org/stable/c/cfd1bab66b042da7a778786685125656c695931b Added Reference https://git.kernel.org/stable/c/d0479c2b12974aa188b10d221a5770126b118b6d Added Reference https://git.kernel.org/stable/c/ffc07790539736a5d029f6a3c966b46c529f93a8