CVE-2022-49277

Service interruption via leaked JFFS2 mount resources

Published Feb 26, 2025 · Updated May 11, 2026

Memory leak in the JFFS2 mount path in affected Linux kernels allows local users to interrupt service via failed filesystem mounts. When jffs2_build_filesystem returns an error, jffs2_do_mount_fs omits jffs2_sum_exit and retains memory allocated by jffs2_sum_init. Reaching the path requires local mount access; repeated failures consume kernel memory and can exhaust resources until service is disrupted.

CVSS severity5.5
Medium
EPSS probability0.27%
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 JFFS2 mount path in affected Linux kernels allows local users to interrupt service via failed filesystem mounts. When jffs2_build_filesystem returns an error, jffs2_do_mount_fs omits jffs2_sum_exit and retains memory allocated by jffs2_sum_init. Reaching the path requires local mount access; repeated failures consume kernel memory and can exhaust resources until service is disrupted.

The record

CVE
CVE-2022-49277
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 <0978e9af4559a171ac7a74a1b3ef21804b0a0fa9
  3. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <2a9d8184458562e6bf2f40d0e677fc85e2dd3834
  4. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <4392e8aeebc5a4f8073620bccba7de1b1f6d7c88
  5. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <5f34310d1376ca5b2ed798258def2c2ab3cc6699
  6. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <607d3aab7349f18e0d9dba4100d09d16fe27caca
  7. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <9a0f6610c7daedd2eace430beeb08a8b7ac80699
  8. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <c94128470e6fe53d9bd9d16d2d3271813f9d37af
  9. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <d051cef784de4d54835f6b6836d98a8f6935772c
  10. Affected versionversion=e631ddba588783edd521c5a89f7b2902772fb691 <dbe0d0521eaa6a3d235517319266c539bb5c5112

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.15; version=e631ddba588783edd521c5a89f7b2902772fb691 <0978e9af4559a171ac7a74a1b3ef21804b0a0fa9; version=e631ddba588783edd521c5a89f7b2902772fb691 <2a9d8184458562e6bf2f40d0e677fc85e2dd3834; version=e631ddba588783edd521c5a89f7b2902772fb691 <4392e8aeebc5a4f8073620bccba7de1b1f6d7c88; version=e631ddba588783edd521c5a89f7b2902772fb691 <5f34310d1376ca5b2ed798258def2c2ab3cc6699; version=e631ddba588783edd521c5a89f7b2902772fb691 <607d3aab7349f18e0d9dba4100d09d16fe27caca; version=e631ddba588783edd521c5a89f7b2902772fb691 <9a0f6610c7daedd2eace430beeb08a8b7ac80699; version=e631ddba588783edd521c5a89f7b2902772fb691 <c94128470e6fe53d9bd9d16d2d3271813f9d37af; version=e631ddba588783edd521c5a89f7b2902772fb691 <d051cef784de4d54835f6b6836d98a8f6935772c; version=e631ddba588783edd521c5a89f7b2902772fb691 <dbe0d0521eaa6a3d235517319266c539bb5c5112

Published CVSS scores

5.5CanonicalCVSS: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 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.

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Technologies

Your stack

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Your stack

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