CVE-2025-39716

MEDIUM EPSS 3.4%
Published Sep 5, 202510mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 5, 2025 10mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
3.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel*≥2.6.13  –  <6.1.149
linuxlinux_kernel*≥6.2  –  <6.6.103
linuxlinux_kernel*≥6.7  –  <6.12.44
linuxlinux_kernel*≥6.13  –  <6.16.4
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
debiandebian_linux11.0any

References 7

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-032379.html
  • git.kernel.org https://git.kernel.org/stable/c/28a9b71671fb4a2993ef85b8ef6f117ea63894fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4c981077255acc2ed5b3df6e8dd0125c81b626a9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/741b163e440683195b8fd4fc8495fcd0105c6ab7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/89f686a0fb6e473a876a9a60a13aec67a62b9a7e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f410ef9a032caf98117256b22139c31342d7bb06
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Third Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/28a9b71671fb4a2993ef85b8ef6f117ea63894fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4c981077255acc2ed5b3df6e8dd0125c81b626a9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/741b163e440683195b8fd4fc8495fcd0105c6ab7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/89f686a0fb6e473a876a9a60a13aec67a62b9a7e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f410ef9a032caf98117256b22139c31342d7bb06
    Patch