CVE-2022-49738Public exploit

Kernel-memory disclosure or crash via unchecked inode size

Published Mar 27, 2025 · Updated Aug 15, 2026

An out-of-bounds read in affected Linux kernel F2FS releases allows local users to read kernel memory or crash the host. During garbage collection, is_alive passes an inode's unchecked i_extra_isize into data_blkaddr, where offset_in_addr can index beyond the node page. Reachability requires a malformed F2FS image to be mounted with CAP_SYS_ADMIN and garbage collection to process the crafted inode; the bounded effects are kernel-memory disclosure and a host crash.

CVSS severity7.1
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds read in affected Linux kernel F2FS releases allows local users to read kernel memory or crash the host. During garbage collection, is_alive passes an inode's unchecked i_extra_isize into data_blkaddr, where offset_in_addr can index beyond the node page. Reachability requires a malformed F2FS image to be mounted with CAP_SYS_ADMIN and garbage collection to process the crafted inode; the bounded effects are kernel-memory disclosure and a host crash.

The record

CVE
CVE-2022-49738
Published
Mar 27, 2025
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Mar 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.14
  2. Affected versionversion=7a2af766af15887754f7f7a0869b4603b390876a <5b25035fb888cb2f78bf0b9c9f95b1dc54480d36
  3. Affected versionversion=7a2af766af15887754f7f7a0869b4603b390876a <914e38f02a490dafd980ff0f39cccedc074deb29
  4. Affected versionversion=7a2af766af15887754f7f7a0869b4603b390876a <97ccfffcc061e54ce87e4a51a40e2e9cb0b7076a
  5. Affected versionversion=7a2af766af15887754f7f7a0869b4603b390876a <d3b7b4afd6b2c344eabf9cc26b8bfa903c164c7c
  6. Affected versionversion=7a2af766af15887754f7f7a0869b4603b390876a <e5142a4935c1f15841d06047b8130078fc4d7b8f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=4.14; version=7a2af766af15887754f7f7a0869b4603b390876a <5b25035fb888cb2f78bf0b9c9f95b1dc54480d36; version=7a2af766af15887754f7f7a0869b4603b390876a <914e38f02a490dafd980ff0f39cccedc074deb29; version=7a2af766af15887754f7f7a0869b4603b390876a <97ccfffcc061e54ce87e4a51a40e2e9cb0b7076a; version=7a2af766af15887754f7f7a0869b4603b390876a <d3b7b4afd6b2c344eabf9cc26b8bfa903c164c7c; version=7a2af766af15887754f7f7a0869b4603b390876a <e5142a4935c1f15841d06047b8130078fc4d7b8f

Published CVSS scores

7.1NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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