CVE-2021-47657

MEDIUM EPSS 16.8%
Published Feb 26, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: drm/virtio: Ensure that objs is not NULL in virtio_gpu_array_put_free() If virtio_gpu_object_shmem_init() fails (e.g. due to fault injection, as it happened in the bug report by syzbot), virtio_gpu_array_put_free() could be called with objs equal to NULL. Ensure that objs is not NULL in virtio_gpu_array_put_free(), or otherwise return from the function.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
16.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥5.11.20  –  <5.12
linuxlinux_kernel*≥5.12.3  –  <5.15.32
linuxlinux_kernel*≥5.16  –  <5.16.18
linuxlinux_kernel*≥5.17  –  <5.17.1

References 4

  • git.kernel.org https://git.kernel.org/stable/c/6b79f96f4a23846516e5e6e4dd37fc06f43a60dd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/abc9ad36df16e27ac1c665085157f1a082d39bac
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ac92b474eeeed75b8660374ba1d129a121c09da8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b094fece3810c71ceee6f0921676cb65d4e68c5a
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/6b79f96f4a23846516e5e6e4dd37fc06f43a60dd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/abc9ad36df16e27ac1c665085157f1a082d39bac
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ac92b474eeeed75b8660374ba1d129a121c09da8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b094fece3810c71ceee6f0921676cb65d4e68c5a
    Patch