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CVE-2026-98373

N/A

Published 2026-10-07 · Last modified 2026-10-21

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: preserve mremap address delta when skipping page tables move_hugetlb_page_tables() optimizes mremap() by advancing to the last entry in the page table when the source page table does not exist, either initially or after unsharing a PMD table. The common loop increment then steps to the first entry in the next page table. However, the code advances both the source and destination addresses to the last entries in their respective page tables, which is wrong. The destination address must be advanced only by the same amount as the source address. If the source and destination offsets within their page tables differ, the destination address can be advanced too far, causing follow-up issues. Fix this by advancing the destination address by the source advance distance. With a reproducer, we were able to trigger a kernel panic on x86-64. With this fix in place, we can no longer reproduce the issue.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.2%chance of exploitation in 30 days · 5th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

—CVSS · not scored

  • No impact metrics

Proof of concept

No public PoC is currently catalogued.

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Data snapshot:

Affected

Vendors Linux

Products Linux

Weakness (CWE)

Not classified.

CVSS vector

Not yet scored.

References and research data (JSON)

Vendor product assessments

Showing 32 of 277 vendor product statements; 245 omitted. Read the full vendor advisory.

  • kernel as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel

    • none available: Affected
    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-64k-modules-core as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-64k-modules-core

    • none available: Affected
    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-devel-matched as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-devel-matched

    • none available: Affected
    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-rt-64k-debug-modules as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-64k-debug-modules

    • none available: Affected
    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-rt-debug-modules-extra as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-debug-modules-extra

    • none available: Affected
    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-zfcpdump-devel as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-zfcpdump-devel

    • none available: Affected
    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-bootwrapper as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-bootwrapper

    • no fix planned: Out of support scope
    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel

    • none available: Affected
    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-64k-devel-matched as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-64k-devel-matched

    • none available: Affected
    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-debug-modules as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-debug-modules

    • none available: Affected
    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-modules-core as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-modules-core

    • none available: Affected
    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-rt-64k-debug-modules-core as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-64k-debug-modules-core

    • none available: Affected
    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-rt-debug-core as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-debug-core

    • none available: Affected
    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-rt-modules-core as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-modules-core

    • none available: Affected
    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-zfcpdump-devel-matched as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-zfcpdump-devel-matched

    • none available: Affected
    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · known affected

    Vendor assessment for this product only.

    pkg:oci/ose-rhel-coreos-9?repository_url=registry.redhat.io/openshift/ose-rhel-coreos-9

    • none available: Affected
    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • bpftool as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/bpftool

    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-debug-devel as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-debug-devel

    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-kdump-devel as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-kdump-devel

    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-rt-doc as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-doc

    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-rt.src as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt?arch=src

    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • perf as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/perf

    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-abi-whitelists as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-abi-whitelists

    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-debug-devel as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-debug-devel

    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-headers as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-headers

    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-rt as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt

    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-rt-debug-kvm as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-debug-kvm

    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-rt-kvm as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-kvm

    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-rt.src as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt?arch=src

    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel-zfcpdump-core as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-zfcpdump-core

    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • kernel.src as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel?arch=src

    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00
  • openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:oci/ose-rhel-coreos-8?repository_url=registry.redhat.io/openshift/ose-rhel-coreos-8

    Red Hat · CVE-2026-98373 · Updated 2026-10-09T11:05:11+00:00

References

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS