CVE-2022-48996

Excess kernel memory use via duplicate schemes

Published Oct 21, 2024 · Updated May 11, 2026

Resource exhaustion in Linux 5.19 through 6.0.11 allows local users to consume excess kernel memory through DAMON online tuning. damon_sysfs_set_schemes() assumes a running DAMON context has no schemes and adds new schemes instead of updating, removing, or reusing existing entries. Triggering the flaw requires root-controlled DAMON sysfs access; duplicate schemes remain attached to the context, increasing memory use without leaking memory.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Linux 5.19 through 6.0.11 allows local users to consume excess kernel memory through DAMON online tuning. damon_sysfs_set_schemes() assumes a running DAMON context has no schemes and adds new schemes instead of updating, removing, or reusing existing entries. Triggering the flaw requires root-controlled DAMON sysfs access; duplicate schemes remain attached to the context, increasing memory use without leaking memory.

The record

CVE
CVE-2022-48996
Published
Oct 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Oct 21, 2024CVE 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=5.19
  2. Affected versionversion=da87878010e59869d4d27b3c01ecc8ec06ff4a20 <95bc35f9bee5220dad4e8567654ab3288a181639
  3. Affected versionversion=da87878010e59869d4d27b3c01ecc8ec06ff4a20 <f98d1f2a36ad7ab48fb4cf73ca14e7b19482fd4d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=da87878010e59869d4d27b3c01ecc8ec06ff4a20 <95bc35f9bee5220dad4e8567654ab3288a181639; version=da87878010e59869d4d27b3c01ecc8ec06ff4a20 <f98d1f2a36ad7ab48fb4cf73ca14e7b19482fd4d

Published CVSS scores

5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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 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 exploitUnconfirmed

Weakness, pattern, technique

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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