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Linux Distros Unpatched Vulnerability : CVE-2026-43371

🗓️ 20 May 2026 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 6 Views

Linux vulnerability CVE-2026-43371 affects macb driver; tx ring shuffle and lock fix NFS rootfs recovery.

Related
Refs
Code
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-43371
8 May 202614:21
attackerkb
CNNVD
Linux kernel 安全漏洞
8 May 202600:00
cnnvd
CVE
CVE-2026-43371
8 May 202614:21
cve
Cvelist
CVE-2026-43371 net: macb: Shuffle the tx ring before enabling tx
8 May 202614:21
cvelist
Debian CVE
CVE-2026-43371
8 May 202614:21
debiancve
EUVD
EUVD-2026-28677
8 May 202615:31
euvd
NVD
CVE-2026-43371
8 May 202615:16
nvd
OSV
BELL-CVE-2026-43371
21 May 202606:10
osv
OSV
DEBIAN-CVE-2026-43371
8 May 202615:16
osv
OSV
ROOT-OS-UBUNTU-2404-CVE-2026-43371 CVE-2026-43371 in rootio-linux - Patched by Root
3 Jun 202607:40
osv
Rows per page
#%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.

  - net: macb: Shuffle the tx ring before enabling tx Quanyang observed that when using an NFS rootfs on an
    AMD ZynqMp board, the rootfs may take an extended time to recover after a suspend. Upon investigation, it
    was determined that the issue originates from a problem in the macb driver. According to the Zynq
    UltraScale TRM [1], when transmit is disabled, the transmit buffer queue pointer resets to point to the
    address specified by the transmit buffer queue base address register. In the current implementation, the
    code merely resets `queue->tx_head` and `queue->tx_tail` to '0'. This approach presents several issues: -
    Packets already queued in the tx ring are silently lost, leading to memory leaks since the associated skbs
    cannot be released. - Concurrent write access to `queue->tx_head` and `queue->tx_tail` may occur from
    `macb_tx_poll()` or `macb_start_xmit()` when these values are reset to '0'. - The transmission may become
    stuck on a packet that has already been sent out, with its 'TX_USED' bit set, but has not yet been
    processed. However, due to the manipulation of 'queue->tx_head' and 'queue->tx_tail', `macb_tx_poll()`
    incorrectly assumes there are no packets to handle because `queue->tx_head == queue->tx_tail`. This issue
    is only resolved when a new packet is placed at this position. This is the root cause of the prolonged
    recovery time observed for the NFS root filesystem. To resolve this issue, shuffle the tx ring and tx skb
    array so that the first unsent packet is positioned at the start of the tx ring. Additionally, ensure that
    updates to `queue->tx_head` and `queue->tx_tail` are properly protected with the appropriate lock. [1]
    https://docs.amd.com/v/u/en-US/ug1085-zynq-ultrascale-trm (CVE-2026-43371)

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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  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  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/Debian/dpkg-l"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

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    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
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          {"reference": "linux-azure-6.11"},
          {"reference": "linux-buildinfo-6.8.0"},
          {"reference": "linux-cloud-tools-6.8.0"},
          {"reference": "linux-cloud-tools-common"},
          {"reference": "linux-doc"},
          {"reference": "linux-gcp-6.11"},
          {"reference": "linux-gcp-6.14"},
          {"reference": "linux-headers-6.8.0"},
          {"reference": "linux-hwe-6.11"},
          {"reference": "linux-hwe-6.14"},
          {"reference": "linux-image-6.8.0"},
          {"reference": "linux-image-unsigned-6.8.0"},
          {"reference": "linux-lib-rust-6.8.0"},
          {"reference": "linux-libc-dev"},
          {"reference": "linux-lowlatency-hwe-6.11"},
          {"reference": "linux-modules-6.8.0"},
          {"reference": "linux-modules-extra-6.8.0"},
          {"reference": "linux-modules-ipu6-6.8.0"},
          {"reference": "linux-modules-ivsc-6.8.0"},
          {"reference": "linux-modules-iwlwifi-6.8.0"},
          {"reference": "linux-nvidia-6.11"},
          {"reference": "linux-oem-6.11"},
          {"reference": "linux-oem-6.14"},
          {"reference": "linux-oem-6.8-headers-6.8.0"},
          {"reference": "linux-oem-6.8-lib-rust-6.8.0"},
          {"reference": "linux-oem-6.8-tools-6.8.0"},
          {"reference": "linux-oracle-6.14"},
          {"reference": "linux-raspi-realtime"},
          {"reference": "linux-realtime"},
          {"reference": "linux-riscv-6.14"},
          {"reference": "linux-riscv-headers-6.8.0"},
          {"reference": "linux-riscv-tools-6.8.0"},
          {"reference": "linux-source-6.8.0"},
          {"reference": "linux-tools-6.8.0"},
          {"reference": "linux-tools-common"},
          {"reference": "linux-tools-host"}
        ]
      }
    ]
  }
};

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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26 May 2026 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.15.5
EPSS0.00013
6