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Linux Distros Unpatched Vulnerability : CVE-2026-46115

🗓️ 29 May 2026 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 10 Views

Linux kernel CVE-2026-46115 patch prevents merging bvecs across pgmaps in zone memory.

Related
Refs
Code
ReporterTitlePublishedViews
Family
CNNVD
Linux kernel 安全漏洞
28 May 202600:00
cnnvd
CVE
CVE-2026-46115
28 May 202609:35
cve
Cvelist
CVE-2026-46115 block: add pgmap check to biovec_phys_mergeable
28 May 202609:35
cvelist
Debian CVE
CVE-2026-46115
28 May 202609:35
debiancve
EUVD
EUVD-2026-32874
28 May 202609:35
euvd
NVD
CVE-2026-46115
28 May 202610:16
nvd
OSV
BELL-CVE-2026-46115
29 May 202606:09
osv
OSV
DEBIAN-CVE-2026-46115
28 May 202610:16
osv
OSV
ROOT-OS-UBUNTU-2404-CVE-2026-46115 CVE-2026-46115 in rootio-linux - Patched by Root
3 Jun 202607:40
osv
OSV
UBUNTU-CVE-2026-46115
28 May 202610:16
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
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  - In the Linux kernel, the following vulnerability has been resolved: block: add pgmap check to
    biovec_phys_mergeable biovec_phys_mergeable() is used by the request merge, DMA mapping, and integrity
    merge paths to decide if two physically contiguous bvec segments can be coalesced into one. It currently
    has no check for whether the segments belong to different dev_pagemaps. When zone device memory is
    registered in multiple chunks, each chunk gets its own dev_pagemap. A single bio can legitimately contain
    bvecs from different pgmaps -- iov_iter_extract_bvecs() breaks at pgmap boundaries but the outer loop in
    bio_iov_iter_get_pages() continues filling the same bio. If such bvecs are physically contiguous,
    biovec_phys_mergeable() will coalesce them, making it impossible to recover the correct pgmap for the
    merged segment via page_pgmap(). Add a zone_device_pages_have_same_pgmap() check to prevent merging bvec
    segments that span different pgmaps. (CVE-2026-46115)

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

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          {"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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01 Jun 2026 00:00Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.19.8
EPSS0.0006
10