CVE-2026-53160

Local kernel memory corruption via FastRPC map race

Published Jun 25, 2026 · Updated Jun 25, 2026

A use-after-free in the Linux Kernel FastRPC driver allows local users to corrupt kernel memory through concurrent map operations. The fastrpc_map_lookup function returns a raw pointer after releasing fl->lock, so MEM_UNMAP can free the map before fastrpc_map_get acquires a reference. Access to an openable /dev/fastrpc-* device is required; published analysis identifies kernel-memory disclosure, corruption, and system crashes as impacts.

CVSS severity7.8
High
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 use-after-free in the Linux Kernel FastRPC driver allows local users to corrupt kernel memory through concurrent map operations. The fastrpc_map_lookup function returns a raw pointer after releasing fl->lock, so MEM_UNMAP can free the map before fastrpc_map_get acquires a reference. Access to an openable /dev/fastrpc-* device is required; published analysis identifies kernel-memory disclosure, corruption, and system crashes as impacts.

The record

CVE
CVE-2026-53160
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 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=0b70ec82b309a4093106ff399da1911ad23b52d3 <0a3b87293fbd34fda651e6aead9964f84b893962
  2. Affected versionversion=10df039834f84a297c72ec962c0f9b7c8c5ca31a <07ebe87915d8accdaba20c4f88c5ae430fe62fbb
  3. Affected versionversion=10df039834f84a297c72ec962c0f9b7c8c5ca31a <992f121796b7ca83a5a8b93da24e971363206218
  4. Affected versionversion=10df039834f84a297c72ec962c0f9b7c8c5ca31a <f20f6512ecb75c816e0debf4551a138f098615c4
  5. Affected versionversion=6.1.156 <6.1.176
  6. Affected versionversion=6.12.53 <6.12.94
  7. Affected versionversion=6.17.3 <6.18
  8. Affected versionversion=6.18
  9. Affected versionversion=6.6.112 <6.6.143
  10. Affected versionversion=802359a52676176b18713e33caa17572ad009057 <5b0166112019d1dce30b976ab28fd67f7f0be532
  11. Affected versionversion=d7513b47082c08105e837b06cebeb3f07a5fa56f <8b080c89183196fd3e49212f2a1a1c4a29335b9c
  12. Affected versionversion=f3f59bab68e9bc714f757ab22f3fb36153014043

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0b70ec82b309a4093106ff399da1911ad23b52d3 <0a3b87293fbd34fda651e6aead9964f84b893962; version=10df039834f84a297c72ec962c0f9b7c8c5ca31a <07ebe87915d8accdaba20c4f88c5ae430fe62fbb; version=10df039834f84a297c72ec962c0f9b7c8c5ca31a <992f121796b7ca83a5a8b93da24e971363206218; version=10df039834f84a297c72ec962c0f9b7c8c5ca31a <f20f6512ecb75c816e0debf4551a138f098615c4; version=6.1.156 <6.1.176; version=6.12.53 <6.12.94; version=6.17.3 <6.18; version=6.18; version=6.6.112 <6.6.143; version=802359a52676176b18713e33caa17572ad009057 <5b0166112019d1dce30b976ab28fd67f7f0be532; version=d7513b47082c08105e837b06cebeb3f07a5fa56f <8b080c89183196fd3e49212f2a1a1c4a29335b9c; version=f3f59bab68e9bc714f757ab22f3fb36153014043

Published CVSS scores

7.8Linux kernel CVE teamCVSS: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

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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

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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