CVE-2022-49857

Local service interruption via initialization memory leak

Published May 1, 2025 · Updated May 11, 2026

Memory leak in the Marvell Prestera network driver in Linux allows local users to interrupt service by exhausting kernel memory during initialization. The prestera_rxtx_switch_init function allocates sw->rxtx but returns without releasing it when prestera_sdma_switch_init fails. Reachability requires the Prestera driver and an SDMA switch initialization failure; the bounded consequence is an unreleased kernel allocation.

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

Memory leak in the Marvell Prestera network driver in Linux allows local users to interrupt service by exhausting kernel memory during initialization. The prestera_rxtx_switch_init function allocates sw->rxtx but returns without releasing it when prestera_sdma_switch_init fails. Reachability requires the Prestera driver and an SDMA switch initialization failure; the bounded consequence is an unreleased kernel allocation.

The record

CVE
CVE-2022-49857
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 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=501ef3066c89d7f9045315e1be58749cf9e6814d <31e5084ac6876e52dbb0a1cc4fc18b6c79979f31
  2. Affected versionversion=501ef3066c89d7f9045315e1be58749cf9e6814d <409731df6310a33f4d0a3ef594d2410cdcd637f2
  3. Affected versionversion=501ef3066c89d7f9045315e1be58749cf9e6814d <519b58bbfa825f042fcf80261cc18e1e35f85ffd
  4. Affected versionversion=501ef3066c89d7f9045315e1be58749cf9e6814d <5333cf1b7f6861912aff6263978d4781f9858e47
  5. Affected versionversion=5.10

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=501ef3066c89d7f9045315e1be58749cf9e6814d <31e5084ac6876e52dbb0a1cc4fc18b6c79979f31; version=501ef3066c89d7f9045315e1be58749cf9e6814d <409731df6310a33f4d0a3ef594d2410cdcd637f2; version=501ef3066c89d7f9045315e1be58749cf9e6814d <519b58bbfa825f042fcf80261cc18e1e35f85ffd; version=501ef3066c89d7f9045315e1be58749cf9e6814d <5333cf1b7f6861912aff6263978d4781f9858e47; version=5.10

Published CVSS scores

5.5NVDCVSS: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

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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