CVE-2026-53096

Kernel compromise via RCU-unsafe DEVMAP_HASH iteration

Published Jun 24, 2026 · Updated Jun 24, 2026

Race condition in the Linux Kernel BPF subsystem allows local users with BPF privileges to corrupt kernel state or crash the system. The DEVMAP_HASH branch of dev_map_redirect_multi() traverses RCU-protected buckets with hlist_for_each_entry_safe(), dereferencing pointers without the acquire barrier required to synchronize with concurrent updates and deletions. Exploitation requires BPF or CAP_NET_ADMIN-style privileges, an attached XDP program, and attacker-driven packet traffic racing map operations; weakly ordered ARM64 and POWER systems can expose inconsistent kernel objects.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux Kernel BPF subsystem allows local users with BPF privileges to corrupt kernel state or crash the system. The DEVMAP_HASH branch of dev_map_redirect_multi() traverses RCU-protected buckets with hlist_for_each_entry_safe(), dereferencing pointers without the acquire barrier required to synchronize with concurrent updates and deletions. Exploitation requires BPF or CAP_NET_ADMIN-style privileges, an attached XDP program, and attacker-driven packet traffic racing map operations; weakly ordered ARM64 and POWER systems can expose inconsistent kernel objects.

The record

CVE
CVE-2026-53096
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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=5.14
  2. Affected versionversion=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <4a3d0fe30b907ff324b1b49756f7e713d67f3645
  3. Affected versionversion=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <571a05ea1baaccc0dc1e0d227b2cbc978b96d392
  4. Affected versionversion=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <7027e705062482a8cea43a1c13ede3c35653966f
  5. Affected versionversion=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <8ed82f807bb09d2c8455aaa665f2c6cb17bc6a19
  6. Affected versionversion=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <b089aa6e94d7a08e74d076a0fe274842dc9feccc
  7. Affected versionversion=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <cb2c1f3cf65b855548e1b8d55a08bfbaa5a0901a
  8. Affected versionversion=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <d4c4bd231ebad70e6f30db429e9640bf378b2f52

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.14; version=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <4a3d0fe30b907ff324b1b49756f7e713d67f3645; version=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <571a05ea1baaccc0dc1e0d227b2cbc978b96d392; version=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <7027e705062482a8cea43a1c13ede3c35653966f; version=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <8ed82f807bb09d2c8455aaa665f2c6cb17bc6a19; version=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <b089aa6e94d7a08e74d076a0fe274842dc9feccc; version=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <cb2c1f3cf65b855548e1b8d55a08bfbaa5a0901a; version=e624d4ed4aa8cc3c69d1359b0aaea539203ed266 <d4c4bd231ebad70e6f30db429e9640bf378b2f52

Published CVSS scores

7.8kernel.orgCVSS: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 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-476NULL Pointer Dereference
T1499Endpoint Denial of Service
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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