CVE-2025-39685

HIGH EPSS 4.5%
Published Sep 5, 20259mo ago · Modified Jun 17, 20261w ago
7.1 CVSS 3.1
High
Find Similar
Published Sep 5, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: comedi: pcl726: Prevent invalid irq number The reproducer passed in an irq number(0x80008000) that was too large, which triggered the oob. Added an interrupt number check to prevent users from passing in an irq number that was too large. If `it->options[1]` is 31, then `1 << it->options[1]` is still invalid because it shifts a 1-bit into the sign bit (which is UB in C). Possible solutions include reducing the upper bound on the `it->options[1]` value to 30 or lower, or using `1U << it->options[1]`. The old code would just not attempt to request the IRQ if the `options[1]` value were invalid. And it would still configure the device without interrupts even if the call to `request_irq` returned an error. So it would be better to combine this test with the test below.

CVSS Details

Base Score
7.1
Exploitability
1.8
Impact
5.2
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥3.13  –  <5.15.190
linuxlinux_kernel*≥5.16  –  <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_kernel6.17any
linuxlinux_kernel6.17any
debiandebian_linux11.0any

References 8

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-032379.html
  • git.kernel.org https://git.kernel.org/stable/c/0eb4ed2aa261dee228f1668dbfa6d87353e8162d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5a33d07c94ba91306093e823112a7aa9727549f6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/96cb948408b3adb69df7e451ba7da9d21f814d00
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a3cfcd0c78c80ca7cd80372dc28f77d01be57bf6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bab220b0bb5af652007e278e8e8357f952b0e1ea
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d8992c9a01f81128f36acb7c5755530e21fcd059
    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/0eb4ed2aa261dee228f1668dbfa6d87353e8162d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5a33d07c94ba91306093e823112a7aa9727549f6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/96cb948408b3adb69df7e451ba7da9d21f814d00
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a3cfcd0c78c80ca7cd80372dc28f77d01be57bf6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bab220b0bb5af652007e278e8e8357f952b0e1ea
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d8992c9a01f81128f36acb7c5755530e21fcd059
    Patch