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🛡️ CVE-2023-53112 — kernel

🟠 CVSS 7.1 — High ✅ No Known Exploit NVD
7.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

drm/i915/sseu: fix max_subslices array-index-out-of-bounds access

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

drm/i915/sseu: fix max_subslices array-index-out-of-bounds access

It seems that commit bc3c5e0809ae ("drm/i915/sseu: Don't try to store EU

mask internally in UAPI format") exposed a potential out-of-bounds

access, reported by UBSAN as following on a laptop with a gen 11 i915

card:

UBSAN: array-index-out-of-bounds in drivers/gpu/drm/i915/gt/intel_sseu.c:65:27

index 6 is out of range for type 'u16 [6]'

CPU: 2 PID: 165 Comm: systemd-udevd Not tainted 6.2.0-9-generic #9-Ubuntu

Hardware name: Dell Inc. XPS 13 9300/077Y9N, BIOS 1.11.0 03/22/2022

Call Trace:

<TASK>

show_stack+0x4e/0x61

dump_stack_lvl+0x4a/0x6f

dump_stack+0x10/0x18

ubsan_epilogue+0x9/0x3a

__ubsan_handle_out_of_bounds.cold+0x42/0x47

gen11_compute_sseu_info+0x121/0x130 [i915]

intel_sseu_info_init+0x15d/0x2b0 [i915]

intel_gt_init_mmio+0x23/0x40 [i915]

i915_driver_mmio_probe+0x129/0x400 [i915]

? intel_gt_probe_all+0x91/0x2e0 [i915]

i915_driver_probe+0xe1/0x3f0 [i915]

? drm_privacy_screen_get+0x16d/0x190 [drm]

? acpi_dev_found+0x64/0x80

i915_pci_probe+0xac/0x1b0 [i915]

...

According to the definition of sseu_dev_info, eu_mask->hsw is limited to

a maximum of GEN_MAX_SS_PER_HSW_SLICE (6) sub-slices, but

gen11_sseu_info_init() can potentially set 8 sub-slices, in the

!IS_JSL_EHL(gt->i915) case.

Fix this by reserving up to 8 slots for max_subslices in the eu_mask

struct.

(cherry picked from commit 3cba09a6ac86ea1d456909626eb2685596c07822)

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 high, 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:H/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: High — total loss, or loss the attacker controls.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2023-53112 is recorded against 2 packages.

  • kernel (from 6.2.0 up to 6.2.8)
  • linux-kernel

Timeline and source

Published on 2 May 2025 and last revised on 12 August 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 (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

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

CVE-2023-53112 on other distributions

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

Details

Severity High
CVSS Score 7.1
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2025-05-02
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.2.0 6.2.8
linux-kernel — —

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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