SECUFOCUSNOW
Home›CVE index›CVE-2022-50306
Review reviewHigh

CVE-2022-50306

Linux Linux, linux kernel

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
7.1
EPSS
0.14%
4.15% percentile
CISA KEV
Not listed
Published
2025.09.16
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.14%
Technical severityCVSS 7.1

Vulnerability overview

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.

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 < 6969367c1500c15eddc38fda12f6d15518ad6d03, >= 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 < f234294812c9b68d603650d28743eafb718e7ad5, >= 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 < 1b45cc5c7b920fd8bf72e5a888ec7abeadf41e09, >= 5.10, < 5.15.87, >= 5.16 < 6.0.6
Fixed versions
5.15.87, 6.0.6

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE
CWE-125
CVE-2022-50306 — Linux Linux, linux kernel | SECUFOCUS NOW