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NVD / CVE Program· CNA Linux

CVE-2022-49220: dax: make sure inodes are flushed before destroy cache

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 770d42fff12d8595adda9025a0b92091f543e775, a7e8de822e0b1979f08767c751f6c8a9c1d4ad86, b786abe7c67c6ef71410c8e23292b3091d616ad1.

Low priority for now. Upgrade to Linux Linux 770d42fff12d8595adda9025a0b92091f543e775, a7e8de822e0b1979f08767c751f6c8a9c1d4ad86, b786abe7c67c6ef71410c8e23292b3091d616ad1 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: dax: make sure inodes are flushed before destroy cache A bug can be triggered by following command $ modprobe nd_pmem && modprobe -r nd_pmem [ 10.060014] BUG dax_cache (Not tainted): Objects remaining in dax_cache on __kmem_cache_shutdown() [ 10.060938] Slab 0x0000000085b729ac objects=9 used=1 fp=0x000000004f5ae469 flags=0x200000000010200(slab|head|node) [ 10.062433] Call Trace: [ 10.062673] dump_stack_lvl+0x34/0x44 [ 10.062865] slab_err+0x90/0xd0 [ 10.063619] __kmem_cache_shutdown+0x13b/0x2f0 [ 10.063848] kmem_cache_destroy+0x4a/0x110 [ 10.064058] __x64_sys_delete_module+0x265/0x300 This is caused by dax_fs_exit() not flushing inodes before destroy cache. To fix this issue, call rcu_barrier() before destroy cache.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 26, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 19th 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%

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  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

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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 kernel4.12 and later · before 5.4.189
  • linux linux kernel5.5 and later · before 5.10.110
  • linux linux kernel5.11 and later · before 5.15.33
  • linux linux kernel5.16 and later · before 5.16.19
  • linux linux kernel5.17 and later · before 5.17.2

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

    • 4.12affected
    • 7b6be8444e0f0dd675b54d059793423d3c9b4c03 and later · before 770d42fff12d8595adda9025a0b92091f543e775affected · git
    • 7b6be8444e0f0dd675b54d059793423d3c9b4c03 and later · before ec376f5c11c88c0215d173599db8449cd4196759affected · git
    • 7b6be8444e0f0dd675b54d059793423d3c9b4c03 and later · before e2951eaa9398415ac054b7bd80b8163b6838ead4affected · git
    • 7b6be8444e0f0dd675b54d059793423d3c9b4c03 and later · before f2a1e0eb70c2d954176c07d75d28742bde30e9f3affected · git
    • 7b6be8444e0f0dd675b54d059793423d3c9b4c03 and later · before b786abe7c67c6ef71410c8e23292b3091d616ad1affected · git
    • 7b6be8444e0f0dd675b54d059793423d3c9b4c03 and later · before a7e8de822e0b1979f08767c751f6c8a9c1d4ad86affected · git
    • before 4.12not affected · semver
    • 5.4.189 and later · up to and including 5.4.*not affected · semver
    • 5.10.110 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.17.3-15.17.3-1
Red Hat:enterprise_linux:9::appstreambpftool-debuginfobefore 0:7.2.0-362.8.1.el9_30:7.2.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-64k-debug-debuginfobefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-64k-debug-develbefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-64k-debug-devel-matchedbefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-64k-debuginfobefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-64k-develbefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-64k-devel-matchedbefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-debug-debuginfobefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-debug-develbefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-debug-devel-matchedbefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-debuginfobefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-debuginfo-common-aarch64before 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-debuginfo-common-ppc64lebefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-debuginfo-common-s390xbefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-debuginfo-common-x86_64before 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-develbefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-devel-matchedbefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-docbefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-tools-debuginfobefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-zfcpdump-debuginfobefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-zfcpdump-develbefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamkernel-zfcpdump-devel-matchedbefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3
Red Hat:enterprise_linux:9::appstreamlibperf-debuginfobefore 0:5.14.0-362.8.1.el9_30:5.14.0-362.8.1.el9_3

+55

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-2022-49218Feb 26, 2025 · drm/dp: Fix OOB read when handling Post Cursor2 register
    28Monitor
  • ← EarlierCVE-2022-49219Feb 26, 2025 · vfio/pci: fix memory leak during D3hot to D0 transition
    22Monitor
  • Later →CVE-2022-49221Feb 26, 2025 · drm/msm/dp: populate connector of struct dp_panel
    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 Linux770d42fff12d8595adda9025a0b92091f543e775Vendor (CNA)
Linux Linuxa7e8de822e0b1979f08767c751f6c8a9c1d4ad86Vendor (CNA)
Linux Linuxb786abe7c67c6ef71410c8e23292b3091d616ad1Vendor (CNA)
Linux Linuxe2951eaa9398415ac054b7bd80b8163b6838ead4Vendor (CNA)
Linux Linuxec376f5c11c88c0215d173599db8449cd4196759Vendor (CNA)
Linux Linuxf2a1e0eb70c2d954176c07d75d28742bde30e9f3Vendor (CNA)
debian:linux5.17.3-1 · Debian:12Package registry (OSV)
red hat:bpftool-debuginfo0:7.2.0-362.8.1.el9_3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-362.8.1.el9_3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-362.8.1.el9_3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-362.8.1.el9_3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-362.8.1.el9_3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-362.8.1.el9_3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-362.8.1.el9_3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-362.8.1.el9_3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-362.8.1.el9_3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-362.8.1.el9_3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debuginfo0:5.14.0-362.8.1.el9_3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-aarch640:5.14.0-362.8.1.el9_3 · Red Hat:enterprise_linux:9::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.

No history yet (it accumulates with the daily EPSS job).

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 (5 more)

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

All records