CVE-2022-49381

Service interruption via failed JFFS2 mount cleanup

Published Feb 26, 2025 · Updated May 11, 2026

Memory leak in the Linux kernel allows local users to interrupt service through repeated failed JFFS2 filesystem mounts. When jffs2_iget() or d_make_root() returns an error, jffs2_do_fill_super() omits jffs2_sum_exit() and retains memory allocated by jffs2_sum_init(). Exploitation requires local access and the ability to initiate a JFFS2 mount; repeated error paths can exhaust kernel memory.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the Linux kernel allows local users to interrupt service through repeated failed JFFS2 filesystem mounts. When jffs2_iget() or d_make_root() returns an error, jffs2_do_fill_super() omits jffs2_sum_exit() and retains memory allocated by jffs2_sum_init(). Exploitation requires local access and the ability to initiate a JFFS2 mount; repeated error paths can exhaust kernel memory.

The record

CVE
CVE-2022-49381
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
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

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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=2.6.15
  2. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <28048a4cf3813b7cf5cc8cce629dfdc7951cb1c2
  3. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <3252d327f977b14663a10967f3b0930d6c325687
  4. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <4ba7bbeab8009faf3a726e565d98816593ddd5b0
  5. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <4da8763a3d2b684c773b72ed80fad40bc264bc40
  6. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <69295267c481545f636b69ff341b8db75aa136b9
  7. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <c14adb1cf70a984ed081c67e9d27bc3caad9537c
  8. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <cf9db013e167bc8fc2ecd7a13ed97a37df0c9dab
  9. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <d3a4fff1e7e408c32649030daa7c2c42a7e19a95
  10. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <ecc53e58596542791e82eff00702f8af7a313f70

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.15; version=e631ddba588783edd521c5a89f7b2902772fb691 <28048a4cf3813b7cf5cc8cce629dfdc7951cb1c2; version=e631ddba588783edd521c5a89f7b2902772fb691 <3252d327f977b14663a10967f3b0930d6c325687; version=e631ddba588783edd521c5a89f7b2902772fb691 <4ba7bbeab8009faf3a726e565d98816593ddd5b0; version=e631ddba588783edd521c5a89f7b2902772fb691 <4da8763a3d2b684c773b72ed80fad40bc264bc40; version=e631ddba588783edd521c5a89f7b2902772fb691 <69295267c481545f636b69ff341b8db75aa136b9; version=e631ddba588783edd521c5a89f7b2902772fb691 <c14adb1cf70a984ed081c67e9d27bc3caad9537c; version=e631ddba588783edd521c5a89f7b2902772fb691 <cf9db013e167bc8fc2ecd7a13ed97a37df0c9dab; version=e631ddba588783edd521c5a89f7b2902772fb691 <d3a4fff1e7e408c32649030daa7c2c42a7e19a95; version=e631ddba588783edd521c5a89f7b2902772fb691 <ecc53e58596542791e82eff00702f8af7a313f70

Published CVSS scores

5.5CISA-ADPCVSS: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

CWE-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

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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