CVE-2022-49747Public exploit

Local denial of service via reversed offset subtraction

Published Mar 27, 2025 · Updated May 11, 2026

Denial of service in Linux kernel EROFS code allows local users to crash the system through post-EOF file access. z_erofs_iomap_begin_report() reverses the post-EOF offset subtraction, reducing iomap->length to zero and triggering WARN_ON in iomap_iter_done(). Local low-privileged access and an EROFS read beyond end of file are required; the demonstrated consequence is a kernel warning or crash.

CVSS severity5.5
Medium
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

Denial of service in Linux kernel EROFS code allows local users to crash the system through post-EOF file access. z_erofs_iomap_begin_report() reverses the post-EOF offset subtraction, reducing iomap->length to zero and triggering WARN_ON in iomap_iter_done(). Local low-privileged access and an EROFS read beyond end of file are required; the demonstrated consequence is a kernel warning or crash.

The record

CVE
CVE-2022-49747
Published
Mar 27, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 27, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=5.15
  2. Affected versionversion=eadcd6b5a1eb39866ab8d8a3e4f2e51bc51a2350 <2144859229c1e74f52d3ea067338d314a83a8afb
  3. Affected versionversion=eadcd6b5a1eb39866ab8d8a3e4f2e51bc51a2350 <6acd87d50998ef0afafc441613aeaf5a8f5c9eff
  4. Affected versionversion=eadcd6b5a1eb39866ab8d8a3e4f2e51bc51a2350 <9f31d8c889d9a4e47bfcc6c4537d0c9f89fe582c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=eadcd6b5a1eb39866ab8d8a3e4f2e51bc51a2350 <2144859229c1e74f52d3ea067338d314a83a8afb; version=eadcd6b5a1eb39866ab8d8a3e4f2e51bc51a2350 <6acd87d50998ef0afafc441613aeaf5a8f5c9eff; version=eadcd6b5a1eb39866ab8d8a3e4f2e51bc51a2350 <9f31d8c889d9a4e47bfcc6c4537d0c9f89fe582c

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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