CVE-2022-48722

Kernel memory exhaustion via leaked transmit buffers

Published Jun 20, 2024 · Updated May 11, 2026

Memory leak in the ca8210 IEEE 802.15.4 driver in Linux allows local users to exhaust kernel memory through failed transmissions. The ca8210_async_xmit_complete function returns from a non-overflow error after waking the queue without freeing priv->tx_skb. Exploitation requires local access and an active Cascoda CA8210 device; repeated failures can degrade availability without reading or altering data.

CVSS severity5.5
Medium
EPSS probability0.22%
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 ca8210 IEEE 802.15.4 driver in Linux allows local users to exhaust kernel memory through failed transmissions. The ca8210_async_xmit_complete function returns from a non-overflow error after waking the queue without freeing priv->tx_skb. Exploitation requires local access and an active Cascoda CA8210 device; repeated failures can degrade availability without reading or altering data.

The record

CVE
CVE-2022-48722
Published
Jun 20, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 20, 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=4.12
  2. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <21feb6df3967541931242c427fe0958276af81cc
  3. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <621b24b09eb61c63f262da0c9c5f0e93348897e5
  4. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <6f38d3a6ec11c2733b1c641a46a2a2ecec57be08
  5. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <78b3f20c17cbcb7645bfa63f2ca0e11b53c09d56
  6. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <94cd597e20ed4acedb8f15f029d92998b011cb1a
  7. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <a1c277b0ed2a13e7de923b5f03bc23586eceb851
  8. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <d6a44feb2f28d71a7e725f72d09c97c81561cd9a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.12; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <21feb6df3967541931242c427fe0958276af81cc; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <621b24b09eb61c63f262da0c9c5f0e93348897e5; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <6f38d3a6ec11c2733b1c641a46a2a2ecec57be08; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <78b3f20c17cbcb7645bfa63f2ca0e11b53c09d56; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <94cd597e20ed4acedb8f15f029d92998b011cb1a; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <a1c277b0ed2a13e7de923b5f03bc23586eceb851; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <d6a44feb2f28d71a7e725f72d09c97c81561cd9a

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Canonical UbuntuCVSS: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
T1499.001OS Exhaustion Flood

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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