# CVE-2023-53646: drm/i915/perf: add sentinel to xehp_oa_b_counters

> A missing sentinel in the i915 GPU driver causes out-of-bounds reads, potentially leading to system crashes or information leaks.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 7 Oct 2025
- **Updated:** 5 Aug 2026
- **Also known as:** BELL-CVE-2023-53646, DEBIAN-CVE-2023-53646, GHSA-v24g-q75p-xqch, UBUNTU-CVE-2023-53646

## What is CVE-2023-53646?

CVE-2023-53646 is a high-severity memory corruption vulnerability in Linux kernel, published on 7 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

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

drm/i915/perf: add sentinel to xehp_oa_b_counters

Arrays passed to reg_in_range_table should end with empty record.

The patch solves KASAN detected bug with signature:
BUG: KASAN: global-out-of-bounds in xehp_is_valid_b_counter_addr+0x2c7/0x350 [i915]
Read of size 4 at addr ffffffffa1555d90 by task perf/1518

CPU: 4 PID: 1518 Comm: perf Tainted: G U 6.4.0-kasan_438-g3303d06107f3+ #1
Hardware name: Intel Corporation Meteor Lake Client Platform/MTL-P DDR5 SODIMM SBS RVP, BIOS MTLPFWI1.R00.3223.D80.2305311348 05/31/2023
Call Trace:
<TASK>
...
xehp_is_valid_b_counter_addr+0x2c7/0x350 [i915]

(cherry picked from commit 2f42c5afb34b5696cf5fe79e744f99be9b218798)

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2023-53646?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2023-53646?

Apply the vendor's patch.

## Is CVE-2023-53646 being exploited?

There is no known exploitation of CVE-2023-53646 in the wild and no public exploit code.

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-53646 and fix it if it is affected.

What it is: CVE-2023-53646 is a high-severity memory corruption vulnerability in Linux kernel, published on 7 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-53646 in the wild and no public exploit code.

Affected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-53646/ (Markdown: https://insights.sbomify.com/CVE-2023-53646/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-53646
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-53646
- OSV: https://osv.dev/vulnerability/CVE-2023-53646

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-53646/
Summaries are generated and may contain mistakes; the official description above is the record.