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Linux Distros Unpatched Vulnerability : CVE-2026-46050

🗓️ 27 May 2026 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 5 Views

Unpatched Linux vulnerability CVE-2026-46050 causes raid ten deadlock when NOWAIT IO interacts with array check.

Related
Refs
Code
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-46050
27 May 202612:57
attackerkb
CNNVD
Linux kernel 安全漏洞
27 May 202600:00
cnnvd
CVE
CVE-2026-46050
27 May 202612:57
cve
Cvelist
CVE-2026-46050 md/raid10: fix deadlock with check operation and nowait requests
27 May 202612:57
cvelist
Debian CVE
CVE-2026-46050
27 May 202612:57
debiancve
EUVD
EUVD-2026-32432
27 May 202612:57
euvd
NVD
CVE-2026-46050
27 May 202614:17
nvd
OSV
BELL-CVE-2026-46050
28 May 202606:10
osv
OSV
DEBIAN-CVE-2026-46050
27 May 202614:17
osv
OSV
ECHO-F42D-8E47-1DB6
28 May 202604:57
osv
Rows per page
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

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patched.");
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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.

  - md/raid10: fix deadlock with check operation and nowait requests When an array check is running it will
    raise the barrier at which point normal requests will become blocked and increment the nr_pending value to
    signal there is work pending inside of wait_barrier(). NOWAIT requests do not block and so will return
    immediately with an error, and additionally do not increment nr_pending in wait_barrier(). Upstream change
    commit 43806c3d5b9b (raid10: cleanup memleak at raid10_make_request) added a call to raid_end_bio_io()
    to fix a memory leak when NOWAIT requests hit this condition. raid_end_bio_io() eventually calls
    allow_barrier() and it will unconditionally do an atomic_dec_and_test(&conf->nr_pending) even though the
    corresponding increment on nr_pending didn't happen in the NOWAIT case. This can be easily seen by
    starting a check operation while an application is doing nowait IO on the same array. This results in a
    deadlocked state due to nr_pending value underflowing and so the md resync thread gets stuck waiting for
    nr_pending to == 0. Output of r10conf state of the array when we hit this condition: crash> struct r10conf
    barrier = 1, nr_pending = { counter = -41 }, nr_waiting = 15, nr_queued = 0, Example of md_sync thread
    stuck waiting on raise_barrier() and other requests stuck in wait_barrier(): md1_resync [<0>]
    raise_barrier+0xce/0x1c0 [<0>] raid10_sync_request+0x1ca/0x1ed0 [<0>] md_do_sync+0x779/0x1110 [<0>]
    md_thread+0x90/0x160 [<0>] kthread+0xbe/0xf0 [<0>] ret_from_fork+0x34/0x50 [<0>]
    ret_from_fork_asm+0x1a/0x30 kworker/u1040:2+flush-253:4 [<0>] wait_barrier+0x1de/0x220 [<0>]
    regular_request_wait+0x30/0x180 [<0>] raid10_make_request+0x261/0x1000 [<0>] md_handle_request+0x13b/0x230
    [<0>] __submit_bio+0x107/0x1f0 [<0>] submit_bio_noacct_nocheck+0x16f/0x390 [<0>] ext4_io_submit+0x24/0x40
    [<0>] ext4_do_writepages+0x254/0xc80 [<0>] ext4_writepages+0x84/0x120 [<0>] do_writepages+0x7a/0x260 [<0>]
    __writeback_single_inode+0x3d/0x300 [<0>] writeback_sb_inodes+0x1dd/0x470 [<0>]
    __writeback_inodes_wb+0x4c/0xe0 [<0>] wb_writeback+0x18b/0x2d0 [<0>] wb_workfn+0x2a1/0x400 [<0>]
    process_one_work+0x149/0x330 [<0>] worker_thread+0x2d2/0x410 [<0>] kthread+0xbe/0xf0 [<0>]
    ret_from_fork+0x34/0x50 [<0>] ret_from_fork_asm+0x1a/0x30 (CVE-2026-46050)

Note that Nessus relies on the presence of the package as reported by the vendor.");
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  script_set_attribute(attribute:"solution", value:
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  script_set_attribute(attribute:"agent", value:"unix");
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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/Debian/dpkg-l")) && empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

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          {"reference": "kernel-rt-debug-devel"},
          {"reference": "kernel-rt-debug-kvm"},
          {"reference": "kernel-rt-debug-modules"},
          {"reference": "kernel-rt-debug-modules-core"},
          {"reference": "kernel-rt-debug-modules-extra"},
          {"reference": "kernel-rt-devel"},
          {"reference": "kernel-rt-kvm"},
          {"reference": "kernel-rt-modules"},
          {"reference": "kernel-rt-modules-core"},
          {"reference": "kernel-rt-modules-extra"},
          {"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"},
          {"reference": "kernel-zfcpdump-modules-extra"},
          {"reference": "libperf"},
          {"reference": "perf"},
          {"reference": "python3-perf"},
          {"reference": "rtla"},
          {"reference": "rv"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "bpftool"},
          {"reference": "kernel"},
          {"reference": "kernel-64k"},
          {"reference": "kernel-64k-core"},
          {"reference": "kernel-64k-debug"},
          {"reference": "kernel-64k-debug-core"},
          {"reference": "kernel-64k-debug-devel"},
          {"reference": "kernel-64k-debug-devel-matched"},
          {"reference": "kernel-64k-debug-modules"},
          {"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"},
          {"reference": "kernel-cross-headers"},
          {"reference": "kernel-debug"},
          {"reference": "kernel-debug-core"},
          {"reference": "kernel-debug-devel"},
          {"reference": "kernel-debug-devel-matched"},
          {"reference": "kernel-debug-modules"},
          {"reference": "kernel-debug-modules-core"},
          {"reference": "kernel-debug-modules-extra"},
          {"reference": "kernel-debug-modules-internal"},
          {"reference": "kernel-debug-modules-partner"},
          {"reference": "kernel-debug-uki-virt"},
          {"reference": "kernel-debug-uki-virt-addons"},
          {"reference": "kernel-devel"},
          {"reference": "kernel-devel-matched"},
          {"reference": "kernel-doc"},
          {"reference": "kernel-headers"},
          {"reference": "kernel-ipaclones-internal"},
          {"reference": "kernel-modules"},
          {"reference": "kernel-modules-core"},
          {"reference": "kernel-modules-extra"},
          {"reference": "kernel-modules-internal"},
          {"reference": "kernel-modules-partner"},
          {"reference": "kernel-rt"},
          {"reference": "kernel-rt-64k"},
          {"reference": "kernel-rt-64k-core"},
          {"reference": "kernel-rt-64k-debug"},
          {"reference": "kernel-rt-64k-debug-core"},
          {"reference": "kernel-rt-64k-debug-devel"},
          {"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"},
          {"reference": "kernel-rt-64k-devel-matched"},
          {"reference": "kernel-rt-64k-kvm"},
          {"reference": "kernel-rt-64k-modules"},
          {"reference": "kernel-rt-64k-modules-core"},
          {"reference": "kernel-rt-64k-modules-extra"},
          {"reference": "kernel-rt-64k-modules-internal"},
          {"reference": "kernel-rt-64k-modules-partner"},
          {"reference": "kernel-rt-core"},
          {"reference": "kernel-rt-debug"},
          {"reference": "kernel-rt-debug-core"},
          {"reference": "kernel-rt-debug-devel"},
          {"reference": "kernel-rt-debug-devel-matched"},
          {"reference": "kernel-rt-debug-kvm"},
          {"reference": "kernel-rt-debug-modules"},
          {"reference": "kernel-rt-debug-modules-core"},
          {"reference": "kernel-rt-debug-modules-extra"},
          {"reference": "kernel-rt-debug-modules-internal"},
          {"reference": "kernel-rt-debug-modules-partner"},
          {"reference": "kernel-rt-devel"},
          {"reference": "kernel-rt-devel-matched"},
          {"reference": "kernel-rt-kvm"},
          {"reference": "kernel-rt-modules"},
          {"reference": "kernel-rt-modules-core"},
          {"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"},
          {"reference": "kernel-zfcpdump-modules-extra"},
          {"reference": "kernel-zfcpdump-modules-internal"},
          {"reference": "kernel-zfcpdump-modules-partner"},
          {"reference": "libperf"},
          {"reference": "libperf-devel"},
          {"reference": "perf"},
          {"reference": "python3-perf"},
          {"reference": "rtla"},
          {"reference": "rv"}
        ]
      }
    ]
  }
};

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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28 May 2026 00:00Current
5.8Medium risk
Vulners AI Score5.8
EPSS0.00032
5