CVE-2022-48872

Local kernel-memory corruption via FASTRPC map race

Published Aug 21, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux kernel FASTRPC driver allows local users to corrupt kernel memory through concurrent map ioctl operations. fastrpc_map_get increments a map reference after fastrpc_free_map begins deletion, allowing fastrpc_map_lookup to retain a reference whose count reached zero. A local user must reach the FASTRPC ioctl path and win the race; exploitation can read or alter kernel memory or crash the system.

CVSS severity7.8
High
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

Use-after-free in the Linux kernel FASTRPC driver allows local users to corrupt kernel memory through concurrent map ioctl operations. fastrpc_map_get increments a map reference after fastrpc_free_map begins deletion, allowing fastrpc_map_lookup to retain a reference whose count reached zero. A local user must reach the FASTRPC ioctl path and win the race; exploitation can read or alter kernel memory or crash the system.

The record

CVE
CVE-2022-48872
Published
Aug 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 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=5.1
  2. Affected versionversion=c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 <079c78c68714f7d8d58e66c477b0243b31806907
  3. Affected versionversion=c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 <556dfdb226ce1e5231d8836159b23f8bb0395bf4
  4. Affected versionversion=c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 <61a0890cb95afec5c8a2f4a879de2b6220984ef1
  5. Affected versionversion=c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 <96b328d119eca7563c1edcc4e1039a62e6370ecb
  6. Affected versionversion=c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 <b171d0d2cf1b8387c72c8d325c5d5746fa271e39

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.1; version=c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 <079c78c68714f7d8d58e66c477b0243b31806907; version=c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 <556dfdb226ce1e5231d8836159b23f8bb0395bf4; version=c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 <61a0890cb95afec5c8a2f4a879de2b6220984ef1; version=c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 <96b328d119eca7563c1edcc4e1039a62e6370ecb; version=c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 <b171d0d2cf1b8387c72c8d325c5d5746fa271e39

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0NIST NVDCVSS:3.1/AV:L/AC:H/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 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-416Use After Free
T1068Exploitation for Privilege Escalation

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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