CVE-2025-71274

Kernel memory corruption via unlocked driver override read

Published May 6, 2026 · Updated May 6, 2026

Use-after-free in the rpmsg core of the Linux Kernel allows local users to disclose or corrupt kernel memory through concurrent sysfs access. In drivers/rpmsg/rpmsg_core.c, driver_override_show() reads the override string without device_lock while the store path can replace and free it. An rpmsg device and write access to its driver_override attribute are required; winning the race exposes stale kernel data, corrupts memory, or triggers a kernel oops or panic.

CVSS severity7.8
High
EPSS probability0.10%
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 rpmsg core of the Linux Kernel allows local users to disclose or corrupt kernel memory through concurrent sysfs access. In drivers/rpmsg/rpmsg_core.c, driver_override_show() reads the override string without device_lock while the store path can replace and free it. An rpmsg device and write access to its driver_override attribute are required; winning the race exposes stale kernel data, corrupts memory, or triggers a kernel oops or panic.

The record

CVE
CVE-2025-71274
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=39e47767ec9b22f844c2a07c9d329256960d4021 <2e4a70f3c30910427e5ea848b799066d67b963d5
  2. Affected versionversion=39e47767ec9b22f844c2a07c9d329256960d4021 <392c6b68334aa0e0ae9aba95c0a366bcb0d92f5d
  3. Affected versionversion=39e47767ec9b22f844c2a07c9d329256960d4021 <42023d4b6d2661a40ee2dcf7e1a3528a35c638ca
  4. Affected versionversion=39e47767ec9b22f844c2a07c9d329256960d4021 <47615557447185917afa432b7958f87583c417cb
  5. Affected versionversion=39e47767ec9b22f844c2a07c9d329256960d4021 <7654e6e3cd6bdee9602f6063b3c670bd556d7e61
  6. Affected versionversion=39e47767ec9b22f844c2a07c9d329256960d4021 <90c8353f471821d7ccd4fe573a2402e056192494
  7. Affected versionversion=39e47767ec9b22f844c2a07c9d329256960d4021 <954557957177c3c13d7c655976665b1170da5e50
  8. Affected versionversion=39e47767ec9b22f844c2a07c9d329256960d4021 <d66b8074c555e8abb0ae19eea1c9f3635498bdde
  9. Affected versionversion=4.18

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=39e47767ec9b22f844c2a07c9d329256960d4021 <2e4a70f3c30910427e5ea848b799066d67b963d5; version=39e47767ec9b22f844c2a07c9d329256960d4021 <392c6b68334aa0e0ae9aba95c0a366bcb0d92f5d; version=39e47767ec9b22f844c2a07c9d329256960d4021 <42023d4b6d2661a40ee2dcf7e1a3528a35c638ca; version=39e47767ec9b22f844c2a07c9d329256960d4021 <47615557447185917afa432b7958f87583c417cb; version=39e47767ec9b22f844c2a07c9d329256960d4021 <7654e6e3cd6bdee9602f6063b3c670bd556d7e61; version=39e47767ec9b22f844c2a07c9d329256960d4021 <90c8353f471821d7ccd4fe573a2402e056192494; version=39e47767ec9b22f844c2a07c9d329256960d4021 <954557957177c3c13d7c655976665b1170da5e50; version=39e47767ec9b22f844c2a07c9d329256960d4021 <d66b8074c555e8abb0ae19eea1c9f3635498bdde; version=4.18

Published CVSS scores

4.7Canonical UbuntuCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
T1499.004Application or System Exploitation

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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