CVE-2022-49959

Service interruption via failed datapath memory leak

Published Jun 18, 2025 · Updated May 11, 2026

A memory leak in Linux kernel 5.15 through 5.15.65, 5.16 through 5.19.7, and 6.0-rc1 through 6.0-rc3 allows local users to interrupt service. During ovs_dp_cmd_new, ovs_dp_set_upcall_portids allocates dp->upcall_portids with kmalloc, but a later new_vport failure leaves that array unfreed. Low-privileged local access and a failed vport creation during datapath setup are required; repeated failures can exhaust kernel memory.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A memory leak in Linux kernel 5.15 through 5.15.65, 5.16 through 5.19.7, and 6.0-rc1 through 6.0-rc3 allows local users to interrupt service. During ovs_dp_cmd_new, ovs_dp_set_upcall_portids allocates dp->upcall_portids with kmalloc, but a later new_vport failure leaves that array unfreed. Low-privileged local access and a failed vport creation during datapath setup are required; repeated failures can exhaust kernel memory.

The record

CVE
CVE-2022-49959
Published
Jun 18, 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. Jun 18, 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=5.15
  2. Affected versionversion=b83d23a2a38b1770da0491257ae81d52307f7816 <a87406f4adee9c53b311d8a1ba2849c69e29a6d0
  3. Affected versionversion=b83d23a2a38b1770da0491257ae81d52307f7816 <c0c1c0241917459644326a1a3102207c871ae159
  4. Affected versionversion=b83d23a2a38b1770da0491257ae81d52307f7816 <ca54b2bfaab385778e55a9fd33f6c31e7f743b48

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=b83d23a2a38b1770da0491257ae81d52307f7816 <a87406f4adee9c53b311d8a1ba2849c69e29a6d0; version=b83d23a2a38b1770da0491257ae81d52307f7816 <c0c1c0241917459644326a1a3102207c871ae159; version=b83d23a2a38b1770da0491257ae81d52307f7816 <ca54b2bfaab385778e55a9fd33f6c31e7f743b48

Published CVSS scores

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 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.

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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