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🛡️ CVE-2023-52627 — debian-linux

🟡 CVSS 5.5 — Medium ✅ No Known Exploit CWE-476 NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

iio: adc: ad7091r: Allow users to configure device events

In the Linux kernel, the following vulnerability has been resolved:

iio: adc: ad7091r: Allow users to configure device events

AD7091R-5 devices are supported by the ad7091r-5 driver together with

the ad7091r-base driver. Those drivers declared iio events for notifying

user space when ADC readings fall bellow the thresholds of low limit

registers or above the values set in high limit registers.

However, to configure iio events and their thresholds, a set of callback

functions must be implemented and those were not present until now.

The consequence of trying to configure ad7091r-5 events without the

proper callback functions was a null pointer dereference in the kernel

because the pointers to the callback functions were not set.

Implement event configuration callbacks allowing users to read/write

event thresholds and enable/disable event generation.

Since the event spec structs are generic to AD7091R devices, also move

those from the ad7091r-5 driver the base driver so they can be reused

when support for ad7091r-2/-4/-8 be added.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: None.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2023-52627 is classified as CWE-476: NULL Pointer Dereference. A pointer that can be null is used without a check, crashing the process.

Affected software

CVE-2023-52627 is recorded against 3 packages.

  • debian-linux
  • kernel (from 6.7.0 up to 6.7.3)
  • linux-kernel (from 6.7 up to 6.7.3)

Timeline and source

Published on 26 March 2024 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
lists.debian.org

Other advisories for this package

debian-linux has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-476: NULL Pointer Dereference) in other software:

CVE-2023-52627 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE CWE-476
Public Exploit ✅ No
Source NVD
Published 2024-03-26
Updated 2026-08-20
Modified 2026-06-17

Affected Packages

Software From version Fixed in
debian-linux — —
kernel 6.7.0 6.7.3
linux-kernel 6.7 6.7.3

References

Similar Threats

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