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Linux Distros Unpatched Vulnerability : CVE-2026-46089

🗓️ 27 May 2026 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 4 Views

Linux kernel zram endio bug CVE-2026-46089 causes discard to hang; no vendor patch.

Related
Refs
Code
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-46089
27 May 202612:58
attackerkb
CNNVD
Linux kernel 安全漏洞
27 May 202600:00
cnnvd
CVE
CVE-2026-46089
27 May 202612:58
cve
Cvelist
CVE-2026-46089 zram: do not forget to endio for partial discard requests
27 May 202612:58
cvelist
Debian CVE
CVE-2026-46089
27 May 202612:58
debiancve
EUVD
EUVD-2026-32472
27 May 202612:58
euvd
NVD
CVE-2026-46089
27 May 202614:17
nvd
OSV
BELL-CVE-2026-46089
28 May 202606:10
osv
OSV
DEBIAN-CVE-2026-46089
27 May 202614:17
osv
OSV
ROOT-OS-UBUNTU-2404-CVE-2026-46089 CVE-2026-46089 in rootio-linux - Patched by Root
3 Jun 202607:40
osv
Rows per page
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##
# (C) Tenable, Inc.
##

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  - In the Linux kernel, the following vulnerability has been resolved: zram: do not forget to endio for
    partial discard requests As reported by Qu Wenruo and Avinesh Kumar, the following getconf PAGESIZE 65536
    blkdiscard -p 4k /dev/zram0 takes literally forever to complete. zram doesn't support partial discards and
    just returns immediately w/o doing any discard work in such cases. The problem is that we forget to endio
    on our way out, so blkdiscard sleeps forever in submit_bio_wait(). Fix this by jumping to end_bio label,
    which does bio_endio(). (CVE-2026-46089)

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if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
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          {"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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27 May 2026 00:00Current
5.7Medium risk
Vulners AI Score5.7
EPSS0.00024
4