CVE-2022-49710

Local crash via undersized dm-log region bitmap

Published Feb 26, 2025 · Updated May 11, 2026

Out-of-bounds read in the Linux kernel dm mirror log allows local users to crash affected 64-bit systems through device-mapper activity. The dm-log code rounds the region bitmap to 32 bits, but find_next_zero_bit_le reads it through unsigned long pointers and can access four bytes beyond the allocation. Reaching the fault requires local low-privileged access on a 64-bit system using the dm mirror log; no confidentiality or integrity impact is documented.

CVSS severity5.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the Linux kernel dm mirror log allows local users to crash affected 64-bit systems through device-mapper activity. The dm-log code rounds the region bitmap to 32 bits, but find_next_zero_bit_le reads it through unsigned long pointers and can access four bytes beyond the allocation. Reaching the fault requires local low-privileged access on a 64-bit system using the dm mirror log; no confidentiality or integrity impact is documented.

The record

CVE
CVE-2022-49710
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 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=2.6.18
  2. Affected versionversion=29121bd0b00ebb9524971a583fea4a2f7afe8041 <0d2209b54f1de0c2f99cab246d4cf2cfe24aaaa9
  3. Affected versionversion=29121bd0b00ebb9524971a583fea4a2f7afe8041 <85e123c27d5cbc22cfdc01de1e2ca1d9003a02d0
  4. Affected versionversion=29121bd0b00ebb9524971a583fea4a2f7afe8041 <9a02f3275acc628c0d956be771405ced79ac36df
  5. Affected versionversion=29121bd0b00ebb9524971a583fea4a2f7afe8041 <ae460312875159285cef5bf3dc654593f404a1ef
  6. Affected versionversion=29121bd0b00ebb9524971a583fea4a2f7afe8041 <ba751f0d25f07aa21ce9b85372a3792bf7969d13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.18; version=29121bd0b00ebb9524971a583fea4a2f7afe8041 <0d2209b54f1de0c2f99cab246d4cf2cfe24aaaa9; version=29121bd0b00ebb9524971a583fea4a2f7afe8041 <85e123c27d5cbc22cfdc01de1e2ca1d9003a02d0; version=29121bd0b00ebb9524971a583fea4a2f7afe8041 <9a02f3275acc628c0d956be771405ced79ac36df; version=29121bd0b00ebb9524971a583fea4a2f7afe8041 <ae460312875159285cef5bf3dc654593f404a1ef; version=29121bd0b00ebb9524971a583fea4a2f7afe8041 <ba751f0d25f07aa21ce9b85372a3792bf7969d13

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon LinuxCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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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