CVE-2022-48958

Local service interruption via GRETH skb leak

Published Oct 21, 2024 · Updated May 11, 2026

Memory leak in the Aeroflex GRETH Ethernet driver in affected Linux kernels allows local users to interrupt service. greth_init_rings() allocates a receive-ring skb but fails to free it when dma_mapping_error() reports a mapping failure, leaking kernel memory on the error path. Exploitation requires local low-privileged access and the GRETH driver path; repeated failures can exhaust memory and disrupt availability.

CVSS severity5.5
Medium
EPSS probability0.24%
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 Aeroflex GRETH Ethernet driver in affected Linux kernels allows local users to interrupt service. greth_init_rings() allocates a receive-ring skb but fails to free it when dma_mapping_error() reports a mapping failure, leaking kernel memory on the error path. Exploitation requires local low-privileged access and the GRETH driver path; repeated failures can exhaust memory and disrupt availability.

The record

CVE
CVE-2022-48958
Published
Oct 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

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=2.6.34
  2. Affected versionversion=d4c41139df6e74c6fff0cbac43e51cab782133be <063a932b64db3317ec020c94466fe52923a15f60
  3. Affected versionversion=d4c41139df6e74c6fff0cbac43e51cab782133be <223654e2e2c8d05347cd8e300f8d1ec6023103dd
  4. Affected versionversion=d4c41139df6e74c6fff0cbac43e51cab782133be <87277bdf2c370ab2d07cfe77dfa9b37f82bbe1e5
  5. Affected versionversion=d4c41139df6e74c6fff0cbac43e51cab782133be <99669d94ce145389f1d6f197e6e18ed50d43fb76
  6. Affected versionversion=d4c41139df6e74c6fff0cbac43e51cab782133be <bfaa8f6c5b84b295dd73b0138b57c5555ca12b1c
  7. Affected versionversion=d4c41139df6e74c6fff0cbac43e51cab782133be <c7adcbd0fd3fde1b19150c3e955fb4a30c5bd9b7
  8. Affected versionversion=d4c41139df6e74c6fff0cbac43e51cab782133be <cb1e293f858e5e1152b8791047ed4bdaaf392189
  9. Affected versionversion=d4c41139df6e74c6fff0cbac43e51cab782133be <dd62867a6383f78f75f07039394aac25924a3307

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.34; version=d4c41139df6e74c6fff0cbac43e51cab782133be <063a932b64db3317ec020c94466fe52923a15f60; version=d4c41139df6e74c6fff0cbac43e51cab782133be <223654e2e2c8d05347cd8e300f8d1ec6023103dd; version=d4c41139df6e74c6fff0cbac43e51cab782133be <87277bdf2c370ab2d07cfe77dfa9b37f82bbe1e5; version=d4c41139df6e74c6fff0cbac43e51cab782133be <99669d94ce145389f1d6f197e6e18ed50d43fb76; version=d4c41139df6e74c6fff0cbac43e51cab782133be <bfaa8f6c5b84b295dd73b0138b57c5555ca12b1c; version=d4c41139df6e74c6fff0cbac43e51cab782133be <c7adcbd0fd3fde1b19150c3e955fb4a30c5bd9b7; version=d4c41139df6e74c6fff0cbac43e51cab782133be <cb1e293f858e5e1152b8791047ed4bdaaf392189; version=d4c41139df6e74c6fff0cbac43e51cab782133be <dd62867a6383f78f75f07039394aac25924a3307

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

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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

T1499.004Application or System Exploitation

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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