CyberSecBulletin
CVE-2025-38529NVD status: Analyzed

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2025-38529 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists versions a88692245c315bf8e225f205297a6f4b13d6856a, 5ac7c60439236fb691b8c7987390e2327bbf18fa, c593215385f0c0163015cca4512ed3ff42875d19 as the first without the flaw, so updating Linux to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.2% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Linux to a88692245c315bf8e225f205297a6f4b13d6856a or 5ac7c60439236fb691b8c7987390e2327bbf18fa or c593215385f0c0163015cca4512ed3ff42875d19 or ff30dd3f15f443d2a0085b12ec2cc95d44f35fa7, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 5.4.297 or 5.10.241 or 5.15.190 or 6.1.147, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinuxad7a370c8be47247f68f7187cc82f4f25a347116 up to, but not including, a88692245c315bf8e225f205297a6f4b13d6856a; ad7a370c8be47247f68f7187cc82f4f25a347116 up to, but not including, 5ac7c60439236fb691b8c7987390e2327bbf18fa; ad7a370c8be47247f68f7187cc82f4f25a347116 up to, but not including, c593215385f0c0163015cca4512ed3ff42875d19; ad7a370c8be47247f68f7187cc82f4f25a347116 up to, but not including, ff30dd3f15f443d2a0085b12ec2cc95d44f35fa7; ad7a370c8be47247f68f7187cc82f4f25a347116 up to, but not including, 955e8835855fed8e87f7d8c8075564a1746c1b4c; ad7a370c8be47247f68f7187cc82f4f25a347116 up to, but not including, e0f3c0867d7d231c70984f05c97752caacd0daba; ad7a370c8be47247f68f7187cc82f4f25a347116 up to, but not including, 43ddd82e6a91913cea1c078e782afd8de60c3a53; ad7a370c8be47247f68f7187cc82f4f25a347116 up to, but not including, 66acb1586737a22dd7b78abc63213b1bcaa100e4; and 1 more rangesa88692245c315bf8e225f205297a6f4b13d6856a, 5ac7c60439236fb691b8c7987390e2327bbf18fa, c593215385f0c0163015cca4512ed3ff42875d19, ff30dd3f15f443d2a0085b12ec2cc95d44f35fa7, 955e8835855fed8e87f7d8c8075564a1746c1b4c, e0f3c0867d7d231c70984f05c97752caacd0daba
LinuxLinux Kernel4.0 up to, but not including, 5.4.297; 5.5 up to, but not including, 5.10.241; 5.11 up to, but not including, 5.15.190; 5.16 up to, but not including, 6.1.147; 6.2 up to, but not including, 6.6.100; 6.7 up to, but not including, 6.12.40; 6.13 up to, but not including, 6.15.8; 6.165.4.297, 5.10.241, 5.15.190, 6.1.147, 6.6.100, 6.12.40
DebianDebian Linux11.0Not stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
LocalThe attacker needs local access or must trick a user into running something.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H. Scored by NVD.

Official description

In the Linux kernel, the following vulnerability has been resolved: comedi: aio_iiro_16: Fix bit shift out of bounds When checking for a supported IRQ number, the following test is used: if ((1 << it->options[1]) & 0xdcfc) { However, `it->options[i]` is an unchecked `int` value from userspace, so the shift amount could be negative or out of bounds. Fix the test by requiring `it->options[1]` to be within bounds before proceeding with the original test. Valid `it->options[1]` values that select the IRQ will be in the range [1,15]. The value 0 explicitly disables the use of interrupts.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

How developers prevent this class of flaw

  • Use a language that provides appropriate memory abstractions.

More Out-of-bounds Read vulnerabilities (CWE-125)

Timeline

  1. CVE record published.
  2. Record last changed materially (score, affected products, status or references).

References

Third-party and government advisories

Recent Out-of-bounds Read vulnerabilities

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