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NVD / CVE Program· CNA Linux

CVE-2022-49991: mm/hugetlb: avoid corrupting page->mapping in hugetlb_mcopy_atomic_pte

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.26% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 3ada1b3e58db255a14ec73a59d7913e84dc5a8a4, ab74ef708dc51df7cf2b8a890b9c6990fac5c0c6, da60ddd80d09f8371fbba1a238a4b318d13ba698.
  • Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 5.5.

Low priority for now. Upgrade to Linux Linux 3ada1b3e58db255a14ec73a59d7913e84dc5a8a4, ab74ef708dc51df7cf2b8a890b9c6990fac5c0c6, da60ddd80d09f8371fbba1a238a4b318d13ba698 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: avoid corrupting page->mapping in hugetlb_mcopy_atomic_pte In MCOPY_ATOMIC_CONTINUE case with a non-shared VMA, pages in the page cache are installed in the ptes. But hugepage_add_new_anon_rmap is called for them mistakenly because they're not vm_shared. This will corrupt the page->mapping used by page cache code.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jun 18, 2025
Updated
Aug 5, 2026
EPSS
0.2% · 18th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CNA vs NVD score

NVD
5.5
CNA · Linux
7.8
2.3 point gap

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.13 and later · before 5.15.65
  • linux linux kernel5.16 and later · before 5.19.6
  • linux linux kernel6.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.13affected
    • f619147104c8ea71e120e4936d2b68ec11a1e527 and later · before da60ddd80d09f8371fbba1a238a4b318d13ba698affected · git
    • f619147104c8ea71e120e4936d2b68ec11a1e527 and later · before 3ada1b3e58db255a14ec73a59d7913e84dc5a8a4affected · git
    • f619147104c8ea71e120e4936d2b68ec11a1e527 and later · before ab74ef708dc51df7cf2b8a890b9c6990fac5c0c6affected · git
    • before 5.13not affected · semver
    • 5.15.65 and later · up to and including 5.15.*not affected · semver
    • 5.19.6 and later · up to and including 5.19.*not affected · semver
    • 6.0 and laternot affected · original_commit_for_fix

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.0.2-16.0.2-1
Red Hat:rhel_e4s:9.0::appstreambpftool-debuginfobefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamkernel-debug-debuginfobefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamkernel-debug-develbefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamkernel-debug-devel-matchedbefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamkernel-debuginfobefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamkernel-debuginfo-common-aarch64before 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamkernel-debuginfo-common-ppc64lebefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamkernel-debuginfo-common-s390xbefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamkernel-debuginfo-common-x86_64before 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamkernel-develbefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamkernel-devel-matchedbefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamkernel-docbefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamkernel-tools-debuginfobefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamkernel-zfcpdump-debuginfobefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamkernel-zfcpdump-develbefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamkernel-zfcpdump-devel-matchedbefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamperfbefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreamperf-debuginfobefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::appstreampython3-perf-debuginfobefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::baseosbpftoolbefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::baseoskernelbefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::baseoskernel-abi-stablelistsbefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0
Red Hat:rhel_e4s:9.0::baseoskernel-corebefore 0:5.14.0-70.144.1.el9_00:5.14.0-70.144.1.el9_0

+28

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2022-49987Jun 18, 2025 · md: call __md_stop_writes in md_stop
    22Monitor
  • ← EarlierCVE-2022-49989Jun 18, 2025 · xen/privcmd: fix error exit of privcmd_ioctl_dm_op()
    22Monitor
  • Later →CVE-2022-49992Jun 18, 2025 · mm/mprotect: only reference swap pfn page if type match
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux3ada1b3e58db255a14ec73a59d7913e84dc5a8a4Vendor (CNA)
Linux Linuxab74ef708dc51df7cf2b8a890b9c6990fac5c0c6Vendor (CNA)
Linux Linuxda60ddd80d09f8371fbba1a238a4b318d13ba698Vendor (CNA)
debian:linux6.0.2-1 · Debian:12Package registry (OSV)
red hat:bpftool-debuginfo0:5.14.0-70.144.1.el9_0 · Red Hat:rhel_e4s:9.0::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-70.144.1.el9_0 · Red Hat:rhel_e4s:9.0::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-70.144.1.el9_0 · Red Hat:rhel_e4s:9.0::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-70.144.1.el9_0 · Red Hat:rhel_e4s:9.0::appstreamPackage registry (OSV)
red hat:kernel-debuginfo0:5.14.0-70.144.1.el9_0 · Red Hat:rhel_e4s:9.0::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-aarch640:5.14.0-70.144.1.el9_0 · Red Hat:rhel_e4s:9.0::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-ppc64le0:5.14.0-70.144.1.el9_0 · Red Hat:rhel_e4s:9.0::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-s390x0:5.14.0-70.144.1.el9_0 · Red Hat:rhel_e4s:9.0::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-x86_640:5.14.0-70.144.1.el9_0 · Red Hat:rhel_e4s:9.0::appstreamPackage registry (OSV)
red hat:kernel-devel0:5.14.0-70.144.1.el9_0 · Red Hat:rhel_e4s:9.0::appstreamPackage registry (OSV)
red hat:kernel-devel-matched0:5.14.0-70.144.1.el9_0 · Red Hat:rhel_e4s:9.0::appstreamPackage registry (OSV)
red hat:kernel-doc0:5.14.0-70.144.1.el9_0 · Red Hat:rhel_e4s:9.0::appstreamPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records