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Linux Distros Unpatched Vulnerability : CVE-2026-45910

🗓️ 29 May 2026 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 7 Views

Unpatched Linux kernel RDMA rxe race in QP timer handlers causes refcount underflow.

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ReporterTitlePublishedViews
Family
Circl
CVE-2026-45910
27 May 202614:33
circl
CNNVD
Linux kernel 安全漏洞
27 May 202600:00
cnnvd
CVE
CVE-2026-45910
27 May 202612:17
cve
Cvelist
CVE-2026-45910 RDMA/rxe: Fix race condition in QP timer handlers
27 May 202612:17
cvelist
Debian CVE
CVE-2026-45910
27 May 202612:17
debiancve
EUVD
EUVD-2026-32376
27 May 202615:33
euvd
NVD
CVE-2026-45910
27 May 202614:17
nvd
OSV
BELL-CVE-2026-45910
28 May 202606:10
osv
OSV
DEBIAN-CVE-2026-45910
27 May 202614:17
osv
OSV
UBUNTU-CVE-2026-45910
27 May 202614:17
osv
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#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

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"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix race condition in QP
    timer handlers I encontered the following warning: WARNING: drivers/infiniband/sw/rxe/rxe_task.c:249 at
    rxe_sched_task+0x1c8/0x238 [rdma_rxe], CPU#0: swapper/0/0 ... libsha1 [last unloaded: ip6_udp_tunnel] CPU:
    0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G C 6.19.0-rc5-64k-v8+ #37 PREEMPT Tainted: [C]=CRAP Hardware
    name: Raspberry Pi 4 Model B Rev 1.2 Call trace: rxe_sched_task+0x1c8/0x238 [rdma_rxe] (P)
    retransmit_timer+0x130/0x188 [rdma_rxe] call_timer_fn+0x68/0x4d0 __run_timers+0x630/0x888 ... WARNING:
    drivers/infiniband/sw/rxe/rxe_task.c:38 at rxe_sched_task+0x1c0/0x238 [rdma_rxe], CPU#0: swapper/0/0 ...
    WARNING: drivers/infiniband/sw/rxe/rxe_task.c:111 at do_work+0x488/0x5c8 [rdma_rxe], CPU#3:
    kworker/u17:4/93400 ... refcount_t: underflow; use-after-free. WARNING: lib/refcount.c:28 at
    refcount_warn_saturate+0x138/0x1a0, CPU#3: kworker/u17:4/93400 The issue is caused by a race condition
    between retransmit_timer() and rxe_destroy_qp, leading to the Queue Pair's (QP) reference count dropping
    to zero during timer handler execution. It seems this warning is harmless because rxe_qp_do_cleanup() will
    flush all pending timers and requests. Example of flow causing the issue: CPU0 CPU1 retransmit_timer() {
    spin_lock_irqsave rxe_destroy_qp() __rxe_cleanup() __rxe_put() // qp->ref_count decrease to 0
    rxe_qp_do_cleanup() { if (qp->valid) { rxe_sched_task() { WARN_ON(rxe_read(task->qp) <= 0); } }
    spin_unlock_irqrestore } spin_lock_irqsave qp->valid = 0 spin_unlock_irqrestore } Ensure the QP's
    reference count is maintained and its validity is checked within the timer callbacks by adding calls to
    rxe_get(qp) and corresponding rxe_put(qp) after use. (CVE-2026-45910)

Note that Nessus relies on the presence of the package as reported by the vendor.");
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  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

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  script_dependencies("ssh_get_info2.nasl", "set_linux_os_id.nasl");
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}

if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "bpftool"},
          {"reference": "kernel"},
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          {"reference": "kernel-64k-debug-core"},
          {"reference": "kernel-64k-debug-devel"},
          {"reference": "kernel-64k-debug-devel-matched"},
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          {"reference": "kernel-64k-debug-modules-core"},
          {"reference": "kernel-64k-debug-modules-extra"},
          {"reference": "kernel-64k-debug-modules-internal"},
          {"reference": "kernel-64k-debug-modules-partner"},
          {"reference": "kernel-64k-devel"},
          {"reference": "kernel-64k-devel-matched"},
          {"reference": "kernel-64k-modules"},
          {"reference": "kernel-64k-modules-core"},
          {"reference": "kernel-64k-modules-extra"},
          {"reference": "kernel-64k-modules-internal"},
          {"reference": "kernel-64k-modules-partner"},
          {"reference": "kernel-abi-stablelists"},
          {"reference": "kernel-core"},
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          {"reference": "kernel-debug-core"},
          {"reference": "kernel-debug-devel"},
          {"reference": "kernel-debug-devel-matched"},
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          {"reference": "kernel-debug-modules-extra"},
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          {"reference": "kernel-debug-modules-partner"},
          {"reference": "kernel-debug-uki-virt"},
          {"reference": "kernel-debug-uki-virt-addons"},
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          {"reference": "kernel-doc"},
          {"reference": "kernel-headers"},
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          {"reference": "kernel-rt-64k-debug-devel-matched"},
          {"reference": "kernel-rt-64k-debug-kvm"},
          {"reference": "kernel-rt-64k-debug-modules"},
          {"reference": "kernel-rt-64k-debug-modules-core"},
          {"reference": "kernel-rt-64k-debug-modules-extra"},
          {"reference": "kernel-rt-64k-debug-modules-internal"},
          {"reference": "kernel-rt-64k-debug-modules-partner"},
          {"reference": "kernel-rt-64k-devel"},
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          {"reference": "kernel-rt-64k-modules"},
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          {"reference": "kernel-rt-devel-matched"},
          {"reference": "kernel-rt-kvm"},
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          {"reference": "kernel-rt-modules-extra"},
          {"reference": "kernel-rt-modules-internal"},
          {"reference": "kernel-rt-modules-partner"},
          {"reference": "kernel-rt-selftests-internal"},
          {"reference": "kernel-selftests-internal"},
          {"reference": "kernel-tools"},
          {"reference": "kernel-tools-libs"},
          {"reference": "kernel-tools-libs-devel"},
          {"reference": "kernel-uki-virt"},
          {"reference": "kernel-uki-virt-addons"},
          {"reference": "kernel-zfcpdump"},
          {"reference": "kernel-zfcpdump-core"},
          {"reference": "kernel-zfcpdump-devel"},
          {"reference": "kernel-zfcpdump-devel-matched"},
          {"reference": "kernel-zfcpdump-modules"},
          {"reference": "kernel-zfcpdump-modules-core"},
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          {"reference": "kernel-zfcpdump-modules-internal"},
          {"reference": "kernel-zfcpdump-modules-partner"},
          {"reference": "libperf"},
          {"reference": "libperf-devel"},
          {"reference": "perf"},
          {"reference": "python3-perf"},
          {"reference": "rtla"},
          {"reference": "rv"}
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var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');
var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}

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Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation

01 Jun 2026 00:00Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.17.8
EPSS0.00014
7