CVE-2026-90171: Software Security Vulnerability Vulnerability

UNKNOWN

Advisory Identifier: GHSA-f5r6-6w97-7r58

Published 2026-09-17

Advisory Summary

CVE-2026-90171 is a security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-90171 at a Glance

CVE Identifier CVE-2026-90171

GHSA Identifier GHSA-f5r6-6w97-7r58

Severity N/A

CVSS v3.1 Base Score N/A

CWE Classification General Security Weakness

Affected Product Software

Package Ecosystem Maven

Published Date 2026-09-17

Last Updated 2026-09-17

How to Fix CVE-2026-90171

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release:

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-90171, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under General Security Weakness. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

In the Linux kernel, the following vulnerability has been resolved: smb: smbdirect: release pending child sockets outside the handler lock smbdirect_socket_destroy() releases the listener's pending/ready child sockets while still holding the listener's handler lock, the &id_priv->handler_mutex taken via rdma_lock_handler(), not sc->listen.lock, and before the listener's own rdma_destroy_id(). That ordering has one real consequence and one cosmetic one. The real one: smbdirect_socket_release() drops the child's last reference, which destroys the child's cm_id. Doing that before the listener's rdma_destroy_id() lets _cma_cancel_listens(), running from the listener's _destroy_id(), walk an already freed child id_priv, which KASAN catches as a slab-use-after-free during listener shutdown: [ 4758.909130] BUG: KASAN: slab-use-after-free in __mutex_lock+0x1469/0x1560 [ 4758.911450] Read of size 1 at addr ffff88821c381db4 by task ksmbd.control/1652 [ 4758.913262] Call Trace: [ 4758.913267] <TASK> [ 4758.913299] __mutex_lock+0x1469/0x1560 [ 4758.913408] _cma_cancel_listens+0x312/0x3b0 [ 4758.913413] _destroy_id+0x363/0xee0 [ 4758.913417] smbdirect_socket_destroy_sync+0x17d5/0x2440 [ 4758.913443] smbdirect_socket_release+0x124/0x230 [ 4758.913451] ksmbd_rdma_stop_listening+0x9f/0x190 [ 4758.913457] ksmbd_conn_transport_destroy+0x65/0x3c0 [ 4758.913463] kill_server_store+0x1fb/0x2b0 [ 4758.913501] kernfs_fop_write_iter+0x349/0x4d0 [ 4758.913507] vfs_write+0x5e7/0xc70 [ 4758.913528] ksys_write+0x12a/0x210 [ 4758.913541] do_syscall_64+0x135/0x460 [ 4758.913555] entry_SYSCALL_64_after_hwframe+0x77/0x7f The cosmetic one: releasing a child recurses into smbdirect_socket_destroy(), which takes the child's own rdma_lock_handler() lock nested under the listener's. The listener's and the child's cm_id are always different instances, so this cannot deadlock for real; the CM core itself nests a new connection id's handler_mutex under the listening id's in cma_ib_req_handler(). But lockdep only sees one lock class, reports possible recursive locking, and then disables itself, hiding real locking bugs for the rest of the run: [ 2424.579653] WARNING: possible recursive locking detected [ 2424.581180] 7.1.0-next-20260623+ #89 Not tainted [ 2424.582548] -------------------------------------------- [ 2424.584500] ksmbd.control/8854 is trying to acquire lock: [ 2424.586817] ffff888102303c20 (&id_priv->handler_mutex){+.+.}-{4:4}, at: smbdirect_socket_destroy_sync+0xc39/0x2440 [ 2424.590590] [ 2424.590590] but task is already holding lock: [ 2424.591601] ffff888102046c20 (&id_priv->handler_mutex){+.+.}-{4:4}, at: smbdirect_socket_destroy_sync+0xc39/0x2440 [ 2424.594178] [ 2424.594178] other info that might help us debug this: [ 2424.596634] Possible unsafe locking scenario: [ 2424.596634] [ 2424.598841] CPU0 [ 2424.599765] ---- [ 2424.600695] lock(&id_priv->handler_mutex); [ 2424.601836] lock(&id_priv->handler_mutex); [ 2424.602590] [ 2424.602590] *** DEADLOCK *** [ 2424.602590] [ 2424.604512] May be due to missing lock nesting notation Splice the pending/ready children onto a local list under the listener's listen.lock, while the handler lock is held so a concurrent CM CONNECT_REQUEST cannot add more, but defer the actual smbdirect_socket_release() calls until after the listener's cm_id has been destroyed and its handler lock dropped. The children are independent sockets whose teardown needs neither the listener's handler lock nor its cm_id. Found with ksmbdzzer [2], a KSMBD fuzzer that drives libFuzzer with a kcov-dataflow [1] coverage vector: it folds each instrumented comparison/argument's runtime operand value together with its PC (the default arm mixes them as pc⊕val) so that a new operand value at a known site counts as new coverage. [1] https://lwn.net/Articles/1077606/ [2] https://github.com/yskzalloc/kcov-dataflow

References

NVD — CVE-2026-90171 NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-90171

git.kernel.org/stable/c/8ea83ef0c4... WEB

https://git.kernel.org/stable/c/8ea83ef0c40ec4463695e22bc9ae43e29bcfede7

git.kernel.org/stable/c/db82fbe4bb... WEB

https://git.kernel.org/stable/c/db82fbe4bb68e68e4aef00ef5b79f92991d8ef8e

Frequently Asked Questions

What is CVE-2026-90171?

CVE-2026-90171 is a security vulnerability in Software classified as a security vulnerability vulnerability under General Security Weakness.

Which Software versions are affected?

Affected versions include releases prior to current release patches.

What version fixes CVE-2026-90171?

Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.

What CWE is associated with CVE-2026-90171?

CVE-2026-90171 is classified under General Security Weakness.

How can I check Maven dependencies for CVE-2026-90171?

Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.

Machine-readable OSV JSON OSV v1.5 Schema

Normalized schema output

View Raw JSON

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-f5r6-6w97-7r58",
  "modified" : "2026-09-17T18:31:54Z",
  "published" : "2026-09-17T18:31:53Z",
  "aliases" : [ "CVE-2026-90171" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: smbdirect: release pending child sockets outside the handler lock\n\nsmbdirect_socket_destroy() releases the listener's pending/ready child\nsockets while still holding the listener's handler lock, the\n&id_priv->handler_mutex taken via rdma_lock_handler(), not\nsc->listen.lock, and before the listener's own rdma_destroy_id().\nThat ordering has one real consequence and one cosmetic one.\n\nThe real one: smbdirect_socket_release() drops the child's last\nreference, which destroys the child's cm_id.  Doing that before the\nlistener's rdma_destroy_id() lets _cma_cancel_listens(), running from\nthe listener's _destroy_id(), walk an already freed child id_priv,\nwhich KASAN catches as a slab-use-after-free during listener shutdown:\n\n[ 4758.909130] BUG: KASAN: slab-use-after-free in __mutex_lock+0x1469/0x1560\n[ 4758.911450] Read of size 1 at addr ffff88821c381db4 by task ksmbd.control/1652\n[ 4758.913262] Call Trace:\n[ 4758.913267]  <TASK>\n[ 4758.913299]  __mutex_lock+0x1469/0x1560\n[ 4758.913408]  _cma_cancel_listens+0x312/0x3b0\n[ 4758.913413]  _destroy_id+0x363/0xee0\n[ 4758.913417]  smbdirect_socket_destroy_sync+0x17d5/0x2440\n[ 4758.913443]  smbdirect_socket_release+0x124/0x230\n[ 4758.913451]  ksmbd_rdma_stop_listening+0x9f/0x190\n[ 4758.913457]  ksmbd_conn_transport_destroy+0x65/0x3c0\n[ 4758.913463]  kill_server_store+0x1fb/0x2b0\n[ 4758.913501]  kernfs_fop_write_iter+0x349/0x4d0\n[ 4758.913507]  vfs_write+0x5e7/0xc70\n[ 4758.913528]  ksys_write+0x12a/0x210\n[ 4758.913541]  do_syscall_64+0x135/0x460\n[ 4758.913555]  entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe cosmetic one: releasing a child recurses into\nsmbdirect_socket_destroy(), which takes the child's own\nrdma_lock_handler() lock nested under the listener's.  The listener's\nand the child's cm_id are always different instances, so this cannot\ndeadlock for real; the CM core itself nests a new connection id's\nhandler_mutex under the listening id's in cma_ib_req_handler().  But\nlockdep only sees one lock class, reports possible recursive locking,\nand then disables itself, hiding real locking bugs for the rest of the\nrun:\n\n[ 2424.579653] WARNING: possible recursive locking detected\n[ 2424.581180] 7.1.0-next-20260623+ #89 Not tainted\n[ 2424.582548] --------------------------------------------\n[ 2424.584500] ksmbd.control/8854 is trying to acquire lock:\n[ 2424.586817] ffff888102303c20 (&id_priv->handler_mutex){+.+.}-{4:4}, at: smbdirect_socket_destroy_sync+0xc39/0x2440\n[ 2424.590590]\n[ 2424.590590] but task is already holding lock:\n[ 2424.591601] ffff888102046c20 (&id_priv->handler_mutex){+.+.}-{4:4}, at: smbdirect_socket_destroy_sync+0xc39/0x2440\n[ 2424.594178]\n[ 2424.594178] other info that might help us debug this:\n[ 2424.596634]  Possible unsafe locking scenario:\n[ 2424.596634]\n[ 2424.598841]        CPU0\n[ 2424.599765]        ----\n[ 2424.600695]   lock(&id_priv->handler_mutex);\n[ 2424.601836]   lock(&id_priv->handler_mutex);\n[ 2424.602590]\n[ 2424.602590]  *** DEADLOCK ***\n[ 2424.602590]\n[ 2424.604512]  May be due to missing lock nesting notation\n\nSplice the pending/ready children onto a local list under the\nlistener's listen.lock, while the handler lock is held so a concurrent\nCM CONNECT_REQUEST cannot add more, but defer the actual\nsmbdirect_socket_release() calls until after the listener's cm_id has\nbeen destroyed and its handler lock dropped.  The children are\nindependent sockets whose teardown needs neither the listener's\nhandler lock nor its cm_id.\n\nFound with ksmbdzzer [2], a KSMBD fuzzer that drives libFuzzer with a\nkcov-dataflow [1] coverage vector: it folds each instrumented\ncomparison/argument's runtime operand value together with its PC (the\ndefault arm mixes them as pc⊕val) so that a new operand value at a known\nsite counts as new coverage.\n\n[1] https://lwn.net/Articles/1077606/\n[2] https://github.com/yskzalloc/kcov-dataflow",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-90171"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8ea83ef0c40ec4463695e22bc9ae43e29bcfede7"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/db82fbe4bb68e68e4aef00ef5b79f92991d8ef8e"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-17T17:17:10Z"
  }
}

Advisory Metadata

Source ID: GHSA-f5r6-6w97-7r58
Schema Version: 1.4.0
Published: 2026-09-17 18:31
Last Modified: 2026-09-17 18:31
Database Record File: advisories/unreviewed/2026/09/GHSA-f5r6-6w97-7r58/GHSA-f5r6-6w97-7r58.json