5.5

CVE-2021-47657: drm/virtio: Ensure that objs is not NULL in virtio_gpu_array_put_free()

Modified
AliasesUBUNTU-CVE-2021-47657DEBIAN-CVE-2021-47657
Published 26-02-2025Last modified 23-05-2026

Vulnerability summary

CVE-2021-47657 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 20.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.28%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 4
RHSA-2022:7683RHSA-2022:8267SUSE-SU-2025:1027-1SUSE-SU-2025:1176-1SUSE-SU-2025:1183-1SUSE-SU-2025:1241-1

Timeline

  1. 26-02-2025
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.28% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu89 products
  • linux< 5.15.0-37.39
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1011.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 377f8331d0565e6f71ba081c894029a92d0c7e77, < b094fece3810c71ceee6f0921676cb65d4e68c5a | ≥ 377f8331d0565e6f71ba081c894029a92d0c7e77, < ac92b474eeeed75b8660374ba1d129a121c09da8 | ≥ 377f8331d0565e6f71ba081c894029a92d0c7e77, < abc9ad36df16e27ac1c665085157f1a082d39bac | ≥ 377f8331d0565e6f71ba081c894029a92d0c7e77, < 6b79f96f4a23846516e5e6e4dd37fc06f43a60dd | 244dbb4abe123779ec30e7c6ca283a681aba5c94 | 1016c0f62f73d5d2c3a5d1ad1e1fb0cdce1993ae | ≥ 5.11.20, < 5.12 | ≥ 5.12.3, < 5.13 | 5.13
  • linux_kernel≥ 5.11.20, < 5.12 | ≥ 5.12.3, < 5.15.32 | ≥ 5.16, < 5.16.18 | ≥ 5.17, < 5.17.1
Debian1 product
  • linux< 5.17.3-1

3 vendors · 92 products

References

8 links