In the Linux kernel, the following vulnerability has been resolved: parisc: Revise __get_user() to probe user read access Because of the way read access support is implemented, read access interruptions are only triggered at privilege levels 2 and 3. The kernel executes at privilege level 0, so __get_user() never triggers a read access interruption (code 26). Thus, it is currently possible for user code to access a read protected address via a system call. Fix this by probing read access rights at privilege level 3 (PRIV_USER) and setting __gu_err to -EFAULT (-14) if access isn't allowed. Note the cmpiclr instruction does a 32-bit compare because COND macro doesn't work inside asm.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00036.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Linux
  • Linux Kernel
References
Link Providers
https://git.kernel.org/stable/c/28a9b71671fb4a2993ef85b8ef6f117ea63894fe cve-icon cve-icon
https://git.kernel.org/stable/c/4c981077255acc2ed5b3df6e8dd0125c81b626a9 cve-icon cve-icon
https://git.kernel.org/stable/c/741b163e440683195b8fd4fc8495fcd0105c6ab7 cve-icon cve-icon
https://git.kernel.org/stable/c/89f686a0fb6e473a876a9a60a13aec67a62b9a7e cve-icon cve-icon
https://git.kernel.org/stable/c/f410ef9a032caf98117256b22139c31342d7bb06 cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html cve-icon
https://lore.kernel.org/linux-cve-announce/2025090551-CVE-2025-39716-7e3c@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-39716 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-39716 cve-icon
History

Fri, 02 Jan 2026 15:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Mon, 03 Nov 2025 18:30:00 +0000

Type Values Removed Values Added
References

Sat, 06 Sep 2025 09:15:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Sat, 06 Sep 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Fri, 05 Sep 2025 17:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: parisc: Revise __get_user() to probe user read access Because of the way read access support is implemented, read access interruptions are only triggered at privilege levels 2 and 3. The kernel executes at privilege level 0, so __get_user() never triggers a read access interruption (code 26). Thus, it is currently possible for user code to access a read protected address via a system call. Fix this by probing read access rights at privilege level 3 (PRIV_USER) and setting __gu_err to -EFAULT (-14) if access isn't allowed. Note the cmpiclr instruction does a 32-bit compare because COND macro doesn't work inside asm.
Title parisc: Revise __get_user() to probe user read access
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-01-02T15:31:49.277Z

Reserved: 2025-04-16T07:20:57.117Z

Link: CVE-2025-39716

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-09-05T18:15:49.123

Modified: 2025-11-03T18:16:44.140

Link: CVE-2025-39716

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-09-05T00:00:00Z

Links: CVE-2025-39716 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-09-06T09:01:35Z