CVE-2022-48962

Kernel memory corruption via freed packet dereference

Published Oct 21, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux Hisilicon FEMAC receive path allows adjacent attackers to corrupt kernel memory through Ethernet frames. hisi_femac_rx passes an skb to napi_gro_receive, which can free it, and then dereferences skb to update received-byte statistics. Exposure requires an active Hisilicon FEMAC interface; exploitation can disclose or alter kernel data or crash the host.

CVSS severity8.8
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux Hisilicon FEMAC receive path allows adjacent attackers to corrupt kernel memory through Ethernet frames. hisi_femac_rx passes an skb to napi_gro_receive, which can free it, and then dereferences skb to update received-byte statistics. Exposure requires an active Hisilicon FEMAC interface; exploitation can disclose or alter kernel data or crash the host.

The record

CVE
CVE-2022-48962
Published
Oct 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=4.8
  2. Affected versionversion=542ae60af24f02e130e62cb3b7c23163a2350056 <196e12671cb629d9f3b77b4d8bec854fc445533a
  3. Affected versionversion=542ae60af24f02e130e62cb3b7c23163a2350056 <296a50aa8b2982117520713edc1375777a9f8506
  4. Affected versionversion=542ae60af24f02e130e62cb3b7c23163a2350056 <3501da8eb6d0f5f114a09ec953c54423f6f35885
  5. Affected versionversion=542ae60af24f02e130e62cb3b7c23163a2350056 <4640177049549de1a43e9bc49265f0cdfce08cfd
  6. Affected versionversion=542ae60af24f02e130e62cb3b7c23163a2350056 <6f4798ac9c9e98f41553c4f5e6c832c8860a6942
  7. Affected versionversion=542ae60af24f02e130e62cb3b7c23163a2350056 <8595a2db8eb0ffcbb466eb9f4a7507a5ba06ebb9
  8. Affected versionversion=542ae60af24f02e130e62cb3b7c23163a2350056 <aceec8ab752428d8e151321479e82cc1a40fee2e
  9. Affected versionversion=542ae60af24f02e130e62cb3b7c23163a2350056 <e71a46cc8c9ad75f3bb0e4b361e81f79c0214cca

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=542ae60af24f02e130e62cb3b7c23163a2350056 <196e12671cb629d9f3b77b4d8bec854fc445533a; version=542ae60af24f02e130e62cb3b7c23163a2350056 <296a50aa8b2982117520713edc1375777a9f8506; version=542ae60af24f02e130e62cb3b7c23163a2350056 <3501da8eb6d0f5f114a09ec953c54423f6f35885; version=542ae60af24f02e130e62cb3b7c23163a2350056 <4640177049549de1a43e9bc49265f0cdfce08cfd; version=542ae60af24f02e130e62cb3b7c23163a2350056 <6f4798ac9c9e98f41553c4f5e6c832c8860a6942; version=542ae60af24f02e130e62cb3b7c23163a2350056 <8595a2db8eb0ffcbb466eb9f4a7507a5ba06ebb9; version=542ae60af24f02e130e62cb3b7c23163a2350056 <aceec8ab752428d8e151321479e82cc1a40fee2e; version=542ae60af24f02e130e62cb3b7c23163a2350056 <e71a46cc8c9ad75f3bb0e4b361e81f79c0214cca

Published CVSS scores

8.8kernel.orgCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

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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