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CVE-2022-0617· NVD / CVE Program· CNA redhat

A flaw null pointer dereference in the Linux kernel UDF file system functionality was found in the way user triggers udf_file_write_iter fun

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: 0.49% (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: bpftool (AlmaLinux:8) 4.18.0-425.3.1.el8; kernel (AlmaLinux:8) 4.18.0-425.3.1.el8; kernel-abi-stablelists (AlmaLinux:8) 4.18.0-425.3.1.el8.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to bpftool (AlmaLinux:8) 4.18.0-425.3.1.el8; kernel (AlmaLinux:8) 4.18.0-425.3.1.el8; kernel-abi-stablelists (AlmaLinux:8) 4.18.0-425.3.1.el8 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

A flaw null pointer dereference in the Linux kernel UDF file system functionality was found in the way user triggers udf_file_write_iter function for the malicious UDF image. A local user could use this flaw to crash the system. Actual from Linux kernel 4.2-rc1 till 5.17-rc2.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 16, 2022
Updated
Jun 17, 2026
EPSS
0.4% · 41th percentile

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 · 0.4%

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

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • 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
debiandebian linux

Affected versions

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

  • debian debian linux10.0
  • debian debian linux11.0
  • debian debian linux9.0
  • linux linux kernel4.2.1 and later · before 5.17
  • linux linux kernel4.2
  • linux linux kernel4.2.0
  • linux linux kernel5.17

Versions reported by the vendor

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

  • n/a Kernel

    • Linux kernel 5.17-rc2affected

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:8bpftoolbefore 4.18.0-425.3.1.el84.18.0-425.3.1.el8
AlmaLinux:8kernelbefore 4.18.0-425.3.1.el84.18.0-425.3.1.el8
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-425.3.1.el84.18.0-425.3.1.el8
AlmaLinux:8kernel-corebefore 4.18.0-425.3.1.el84.18.0-425.3.1.el8
AlmaLinux:8kernel-cross-headersbefore 4.18.0-425.3.1.el84.18.0-425.3.1.el8
AlmaLinux:8kernel-debugbefore 4.18.0-425.3.1.el84.18.0-425.3.1.el8
AlmaLinux:8kernel-debug-corebefore 4.18.0-425.3.1.el84.18.0-425.3.1.el8
AlmaLinux:8kernel-debug-develbefore 4.18.0-425.3.1.el84.18.0-425.3.1.el8
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-425.3.1.el84.18.0-425.3.1.el8
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-425.3.1.el84.18.0-425.3.1.el8
AlmaLinux:8kernel-develbefore 4.18.0-425.3.1.el84.18.0-425.3.1.el8
AlmaLinux:8kernel-docbefore 4.18.0-425.3.1.el84.18.0-425.3.1.el8
AlmaLinux:8kernel-headersbefore 4.18.0-425.3.1.el84.18.0-425.3.1.el8
AlmaLinux:8kernel-modulesbefore 4.18.0-425.3.1.el84.18.0-425.3.1.el8
AlmaLinux:8kernel-modules-extrabefore 4.18.0-425.3.1.el84.18.0-425.3.1.el8
AlmaLinux:8kernel-rtbefore 4.18.0-425.3.1.rt7.213.el84.18.0-425.3.1.rt7.213.el8
AlmaLinux:8kernel-rt-corebefore 4.18.0-425.3.1.rt7.213.el84.18.0-425.3.1.rt7.213.el8
AlmaLinux:8kernel-rt-debugbefore 4.18.0-425.3.1.rt7.213.el84.18.0-425.3.1.rt7.213.el8
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-425.3.1.rt7.213.el84.18.0-425.3.1.rt7.213.el8
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-425.3.1.rt7.213.el84.18.0-425.3.1.rt7.213.el8
AlmaLinux:8kernel-rt-debug-kvmbefore 4.18.0-425.3.1.rt7.213.el84.18.0-425.3.1.rt7.213.el8
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-425.3.1.rt7.213.el84.18.0-425.3.1.rt7.213.el8
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-425.3.1.rt7.213.el84.18.0-425.3.1.rt7.213.el8
AlmaLinux:8kernel-rt-develbefore 4.18.0-425.3.1.rt7.213.el84.18.0-425.3.1.rt7.213.el8

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • 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
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2021-45402Feb 11, 2022 · The check_alu_op() function in kernel/bpf/verifier.c in the Linux kernel through v5.16-rc5 did not properly update bounds while handling the
    22Monitor
  • ← EarlierCVE-2021-44879Feb 14, 2022 · In gc_data_segment in fs/f2fs/gc.c in the Linux kernel before 5.16.3, special files are not considered, leading to a move_data_page NULL poi
    22Monitor
  • Later →CVE-2021-3752Feb 16, 2022 · A use-after-free flaw was found in the Linux kernel’s Bluetooth subsystem in the way user calls connect to the socket and disconnect simulta
    29Monitor

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
almalinux:kernel-rt4.18.0-425.3.1.rt7.213.el8 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-core4.18.0-425.3.1.rt7.213.el8 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug4.18.0-425.3.1.rt7.213.el8 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-core4.18.0-425.3.1.rt7.213.el8 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-devel4.18.0-425.3.1.rt7.213.el8 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-kvm4.18.0-425.3.1.rt7.213.el8 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-modules4.18.0-425.3.1.rt7.213.el8 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-modules-extra4.18.0-425.3.1.rt7.213.el8 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-devel4.18.0-425.3.1.rt7.213.el8 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-kvm4.18.0-425.3.1.rt7.213.el8 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-modules4.18.0-425.3.1.rt7.213.el8 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-modules-extra4.18.0-425.3.1.rt7.213.el8 · AlmaLinux:8Package registry (OSV)
debian:linux5.16.7-1 · Debian:12Package registry (OSV)
opensuse:dtb-aarch645.14.21-150400.24.11.1 · openSUSE:Leap 15.4Package registry (OSV)
opensuse:kernel-64kb5.14.21-150400.24.11.1 · openSUSE:Leap 15.4Package registry (OSV)
opensuse:kernel-debug5.14.21-150400.24.11.1 · openSUSE:Leap 15.4Package registry (OSV)
red hat:kernel-rt0:4.18.0-425.3.1.rt7.213.el8 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-core0:4.18.0-425.3.1.rt7.213.el8 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug0:4.18.0-425.3.1.rt7.213.el8 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-core0:4.18.0-425.3.1.rt7.213.el8 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-debuginfo0:4.18.0-425.3.1.rt7.213.el8 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-devel0:4.18.0-425.3.1.rt7.213.el8 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-kvm0:4.18.0-425.3.1.rt7.213.el8 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-modules0:4.18.0-425.3.1.rt7.213.el8 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-modules-extra0:4.18.0-425.3.1.rt7.213.el8 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debuginfo0:4.18.0-425.3.1.rt7.213.el8 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debuginfo-common-x86_640:4.18.0-425.3.1.rt7.213.el8 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-devel0:4.18.0-425.3.1.rt7.213.el8 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
rocky linux:kernel0:4.18.0-425.3.1.el8 · Rocky Linux:8Package registry (OSV)
rocky linux:kernel-rt0:4.18.0-425.3.1.rt7.213.el8 · Rocky Linux:8Package registry (OSV)

+21

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.

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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)

CWE-476 · NULL Pointer Dereference

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 (6 more)

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

All records