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Linux Distros Unpatched Vulnerability : CVE-2026-53126

🗓️ 25 Jun 2026 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 3 Views

Linux kernel fix for disk reference leak in blkcg throttle on error paths; CVE-2026-53126.

Related
Refs
Code
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-53126
24 Jun 202616:30
attackerkb
Circl
CVE-2026-53126
24 Jun 202618:18
circl
CVE
CVE-2026-53126
24 Jun 202616:30
cve
Cvelist
CVE-2026-53126 blk-cgroup: fix disk reference leak in blkcg_maybe_throttle_current()
24 Jun 202616:30
cvelist
Debian CVE
CVE-2026-53126
24 Jun 202616:30
debiancve
EUVD
EUVD-2026-38994
24 Jun 202616:30
euvd
NVD
CVE-2026-53126
24 Jun 202617:17
nvd
OSV
DEBIAN-CVE-2026-53126
24 Jun 202620:48
osv
OSV
UBUNTU-CVE-2026-53126
25 Jun 202600:00
osv
Positive Technologies
PT-2026-52020
24 Jun 202600:00
ptsecurity
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.

  - In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: fix disk reference leak in
    blkcg_maybe_throttle_current() Add the missing put_disk() on the error path in
    blkcg_maybe_throttle_current(). When blkcg lookup, blkg lookup, or blkg_tryget() fails, the function jumps
    to the out label which only calls rcu_read_unlock() but does not release the disk reference acquired by
    blkcg_schedule_throttle() via get_device(). Since current->throttle_disk is already set to NULL before the
    lookup, blkcg_exit() cannot release this reference either, causing the disk to never be freed. Restore the
    reference release that was present as blk_put_queue() in the original code but was inadvertently dropped
    during the conversion from request_queue to gendisk. (CVE-2026-53126)

Note that Nessus relies on the presence of the package as reported by the vendor.");
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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');

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          {"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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25 Jun 2026 00:00Current
5.7Medium risk
Vulners AI Score5.7
3