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NVD / CVE Program· CNA Linux

CVE-2022-50020: ext4: avoid resizing to a partial cluster size

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: 0.20% (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 0082e99a9074ff88eff729c70c93454c8588d8e1, 69cb8e9d8cd97cdf5e293b26d70a9dee3e35e6bd, 72b850a2a996f72541172e7cf686d54a2b29bcd8.

Low priority for now. Upgrade to Linux Linux 0082e99a9074ff88eff729c70c93454c8588d8e1, 69cb8e9d8cd97cdf5e293b26d70a9dee3e35e6bd, 72b850a2a996f72541172e7cf686d54a2b29bcd8 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: ext4: avoid resizing to a partial cluster size This patch avoids an attempt to resize the filesystem to an unaligned cluster boundary. An online resize to a size that is not integral to cluster size results in the last iteration attempting to grow the fs by a negative amount, which trips a BUG_ON and leaves the fs with a corrupted in-memory superblock.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jun 18, 2025
Updated
Nov 5, 2026
EPSS
0.2% · 11th 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 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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.

Follow CVE-2022-50020

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

Affected versions

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

  • linux linux kernelbefore 4.9.326
  • linux linux kernel4.10 and later · before 4.14.291
  • linux linux kernel4.15 and later · before 4.19.256
  • linux linux kernel4.20 and later · before 5.4.211
  • linux linux kernel5.5 and later · before 5.10.138
  • linux linux kernel5.11 and later · before 5.15.63
  • linux linux kernel5.16 and later · before 5.19.4

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

    • 4.15affected
    • d77147ff443b255d82c907a632c825b2cc610b10 and later · before 7bdfb01fc5f6b3696728aeb527c50386e0ee09a1affected · git
    • d77147ff443b255d82c907a632c825b2cc610b10 and later · before a6805b3dcf5cd41f2ae3a03dca43411135b99849affected · git
    • d77147ff443b255d82c907a632c825b2cc610b10 and later · before 80288883294c5b4ed18bae0d8bd9c4a12f297074affected · git
    • d77147ff443b255d82c907a632c825b2cc610b10 and later · before 72b850a2a996f72541172e7cf686d54a2b29bcd8affected · git
    • d77147ff443b255d82c907a632c825b2cc610b10 and later · before 0082e99a9074ff88eff729c70c93454c8588d8e1affected · git
    • d77147ff443b255d82c907a632c825b2cc610b10 and later · before 69cb8e9d8cd97cdf5e293b26d70a9dee3e35e6bdaffected · git
    • before 4.15not affected · semver
    • 4.19.256 and later · up to and including 4.19.*not affected · semver
    • 5.4.211 and later · up to and including 5.4.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:8bpftoolbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-rtbefore 4.18.0-553.66.1.rt7.407.el8_104.18.0-553.66.1.rt7.407.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.66.1.rt7.407.el8_104.18.0-553.66.1.rt7.407.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.66.1.rt7.407.el8_104.18.0-553.66.1.rt7.407.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.66.1.rt7.407.el8_104.18.0-553.66.1.rt7.407.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.66.1.rt7.407.el8_104.18.0-553.66.1.rt7.407.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.66.1.rt7.407.el8_104.18.0-553.66.1.rt7.407.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.66.1.rt7.407.el8_104.18.0-553.66.1.rt7.407.el8_10
AlmaLinux:8kernel-rt-develbefore 4.18.0-553.66.1.rt7.407.el8_104.18.0-553.66.1.rt7.407.el8_10
AlmaLinux:8kernel-rt-modulesbefore 4.18.0-553.66.1.rt7.407.el8_104.18.0-553.66.1.rt7.407.el8_10

+96

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-2022-50008Jun 18, 2025 · kprobes: don't call disarm_kprobe() for disabled kprobes
    22Monitor
  • ← EarlierCVE-2022-50012Jun 18, 2025 · powerpc/64: Init jump labels before parse_early_param()
    22Monitor
  • Later →CVE-2022-50021Jun 18, 2025 · ext4: block range must be validated before use in ext4_mb_clear_bb()
    31Monitor

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 Linux0082e99a9074ff88eff729c70c93454c8588d8e1Vendor (CNA)
Linux Linux69cb8e9d8cd97cdf5e293b26d70a9dee3e35e6bdVendor (CNA)
Linux Linux72b850a2a996f72541172e7cf686d54a2b29bcd8Vendor (CNA)
Linux Linux7bdfb01fc5f6b3696728aeb527c50386e0ee09a1Vendor (CNA)
Linux Linux80288883294c5b4ed18bae0d8bd9c4a12f297074Vendor (CNA)
Linux Linuxa6805b3dcf5cd41f2ae3a03dca43411135b99849Vendor (CNA)
almalinux:bpftool4.18.0-553.66.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel4.18.0-553.66.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-abi-stablelists4.18.0-553.66.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-core4.18.0-553.66.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-cross-headers4.18.0-553.66.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug4.18.0-553.66.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-core4.18.0-553.66.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-devel4.18.0-553.66.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules4.18.0-553.66.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules-extra4.18.0-553.66.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-devel4.18.0-553.66.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-doc4.18.0-553.66.1.el8_10 · AlmaLinux:8Package registry (OSV)
debian:linux6.0.2-1 · Debian:12Package registry (OSV)
red hat:bpftool0:4.18.0-553.66.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-553.66.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-553.66.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-abi-stablelists0:4.18.0-553.66.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-553.66.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug0:4.18.0-553.66.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-core0:4.18.0-553.66.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-553.66.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-devel0:4.18.0-553.66.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-modules0:4.18.0-553.66.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-modules-extra0:4.18.0-553.66.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)

+3

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.

  • CVE-2021-47251393 days apartmac80211: fix skb length check in ieee80211_scan_rx()
    31Monitor
  • CVE-2026-63869396 days apartwifi: mac80211: limit injected antenna index in ieee80211_parse_tx_radiotap
    30Monitor
  • CVE-2024-38659362 days apartenic: Validate length of nl attributes in enic_set_vf_port
    28Monitor
  • CVE-2024-35963394 days apartBluetooth: hci_sock: Fix not validating setsockopt user input
    28Monitor
  • CVE-2024-35964394 days apartBluetooth: ISO: Fix not validating setsockopt user input
    28Monitor
  • CVE-2024-35965394 days apartBluetooth: L2CAP: Fix not validating setsockopt user input
    28Monitor

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)

CWE-1284 · Improper Validation of Specified Quantity in Input

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. SSVC exploitation— → none
  2. 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