CVE-2021-47657
drm/virtio: Ensure that objs is not NULL in virtio_gpu_array_put_free()
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Timeline
ID reserved
By Linux
Published
- 15 months later
· 15 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.28% · top 80% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected 377f8331d0565e6f71ba081c894029a92d0c7e77 – < b094fece3810c71ceee6f0921676cb65d4e68c5a
- affected 377f8331d0565e6f71ba081c894029a92d0c7e77 – < ac92b474eeeed75b8660374ba1d129a121c09da8
- affected 377f8331d0565e6f71ba081c894029a92d0c7e77 – < abc9ad36df16e27ac1c665085157f1a082d39bac
- affected 377f8331d0565e6f71ba081c894029a92d0c7e77 – < 6b79f96f4a23846516e5e6e4dd37fc06f43a60dd
- affected 244dbb4abe123779ec30e7c6ca283a681aba5c94
- affected 1016c0f62f73d5d2c3a5d1ad1e1fb0cdce1993ae
- affected 5.11.20 – < 5.12
- affected 5.12.3 – < 5.13
- affected 5.13
- unaffected < 5.13
- unaffected 5.15.32 – ≤ 5.15.*
- unaffected 5.16.18 – ≤ 5.16.*
- unaffected 5.17.1 – ≤ 5.17.*
- unaffected 5.18 – ≤ *
References (4)
- https://git.kernel.org/stable/c/b094fece3810c71ceee6f0921676cb65d4e68c5a (opens in a new tab)
- https://git.kernel.org/stable/c/ac92b474eeeed75b8660374ba1d129a121c09da8 (opens in a new tab)
- https://git.kernel.org/stable/c/abc9ad36df16e27ac1c665085157f1a082d39bac (opens in a new tab)
- https://git.kernel.org/stable/c/6b79f96f4a23846516e5e6e4dd37fc06f43a60dd (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-47657)Record last updated .