Linux Kernel up to 5.19.3 ext4 iteration

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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 5.19.3. Affected by this vulnerability is an unknown functionality of the component ext4. This manipulation causes iteration. This vulnerability is tracked as CVE-2022-50020. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.19.3. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component ext4. The manipulation with an unknown input leads to a iteration vulnerability. The CWE definition for the vulnerability is CWE-834. The product performs an iteration or loop without sufficiently limiting the number of times that the loop is executed. As an impact it is known to affect availability. The summary by CVE is:

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.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2022-50020 since 06/18/2025. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 243404 (RHEL 8 : kernel (RHSA-2025:12752)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.9.326, 4.14.291, 4.19.256, 5.4.211, 5.10.138, 5.15.63 or 5.19.4 eliminates this vulnerability. Applying the patch 53f62a4201be1cfc1e3c971e566888b182c3ffb0/952b3dc02baaae6a69c71c0aca23e06741182d9a/7bdfb01fc5f6b3696728aeb527c50386e0ee09a1/a6805b3dcf5cd41f2ae3a03dca43411135b99849/80288883294c5b4ed18bae0d8bd9c4a12f297074/72b850a2a996f72541172e7cf686d54a2b29bcd8/0082e99a9074ff88eff729c70c93454c8588d8e1/69cb8e9d8cd97cdf5e293b26d70a9dee3e35e6bd is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (243404) and CERT Bund (WID-SEC-2025-1350). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel
  • RESF Rocky Linux
  • Dell Avamar
  • Dell NetWorker
  • Dell Secure Connect Gateway
  • IBM QRadar SIEM

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Iteration
CWE: CWE-834 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 243404
Nessus Name: RHEL 8 : kernel (RHSA-2025:12752)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 4.9.326/4.14.291/4.19.256/5.4.211/5.10.138/5.15.63/5.19.4
Patch: 53f62a4201be1cfc1e3c971e566888b182c3ffb0/952b3dc02baaae6a69c71c0aca23e06741182d9a/7bdfb01fc5f6b3696728aeb527c50386e0ee09a1/a6805b3dcf5cd41f2ae3a03dca43411135b99849/80288883294c5b4ed18bae0d8bd9c4a12f297074/72b850a2a996f72541172e7cf686d54a2b29bcd8/0082e99a9074ff88eff729c70c93454c8588d8e1/69cb8e9d8cd97cdf5e293b26d70a9dee3e35e6bd

Timelineinfo

06/18/2025 Advisory disclosed
06/18/2025 +0 days CVE reserved
06/18/2025 +0 days VulDB entry created
11/30/2025 +165 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2022-50020 (🔒)
GCVE (CVE): GCVE-0-2022-50020
GCVE (VulDB): GCVE-100-313027
CERT Bund: WID-SEC-2025-1350 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 06/18/2025 15:00
Updated: 11/30/2025 19:44
Changes: 06/18/2025 15:00 (58), 07/18/2025 03:19 (7), 07/29/2025 08:37 (1), 08/06/2025 01:24 (2), 10/19/2025 06:06 (1), 11/13/2025 20:40 (11), 11/30/2025 19:44 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

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