CVE-2022-50306
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-15

Last updated on: 2025-12-04

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ext4: fix potential out of bound read in ext4_fc_replay_scan() For scan loop must ensure that at least EXT4_FC_TAG_BASE_LEN space. If remain space less than EXT4_FC_TAG_BASE_LEN which will lead to out of bound read when mounting corrupt file system image. ADD_RANGE/HEAD/TAIL is needed to add extra check when do journal scan, as this three tags will read data during scan, tag length couldn't less than data length which will read.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2025-09-15
Last Modified
2025-12-04
Generated
2026-06-16
AI Q&A
2025-09-15
EPSS Evaluated
2026-06-15
NVD
CVE-2022-50306
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
linux linux_kernel to 5.15.87 (exc)
linux linux_kernel From 5.16 (inc) to 6.0.6 (exc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability is a potential out of bound read in the Linux kernel's ext4 file system code, specifically in the ext4_fc_replay_scan() function. It occurs when the scan loop does not ensure there is enough space (at least EXT4_FC_TAG_BASE_LEN) before reading, which can lead to reading beyond the intended memory bounds when mounting a corrupt file system image. The fix involves adding extra checks for certain tags (ADD_RANGE, HEAD, TAIL) during the journal scan to prevent reading invalid data lengths.

Impact Analysis

This vulnerability can lead to out of bound memory reads when mounting a corrupt ext4 file system image, which may cause system instability, crashes, or potentially expose sensitive memory contents. This could affect system reliability and security when handling corrupted file systems.

Mitigation Strategies

To mitigate this vulnerability, update the Linux kernel to a version where the ext4 out of bound read issue in ext4_fc_replay_scan() has been fixed. Avoid mounting potentially corrupt ext4 file system images until the patch is applied.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2022-50306. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart