An issue was discovered in the Linux kernel through 5.11.3, as used with Xen PV.
Priority LOW 30CWE-770Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-770.
Summary
An issue was discovered in the Linux kernel through 5.11.3, as used with Xen PV. A certain part of the netback driver lacks necessary treatment of errors such as failed memory allocations (as a result of changes to the handling of grant mapping errors). A host OS denial of service may occur during misbehavior of a networking frontend driver. NOTE: this issue exists because of an incomplete fix for CVE-2021-26931.
Why it matters now
EPSS 0.00708 53rd percentileScored 2026-11-08
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 2.6.39 to before 4.4.260; 4.5.0 to before 4.9.260; 4.10.0 to before 4.14.224; 4.15.0 to before 4.19.179; 4.20.0 to before 5.4.103; 5.10.0 to before 5.10.21; 5.11.0 to before 5.11.4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.12:rc1:*:*:*:*:*:* | 5.12 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.12:rc2:*:*:*:*:*:* | 5.12 rc2 | Vulnerable | Linux |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.39 to before 4.4.260; 4.5.0 to before 4.9.260; 4.10.0 to before 4.14.224; 4.15.0 to before 4.19.179; 4.20.0 to before 5.4.103; 5.10.0 to before 5.10.21; 5.11.0 to before 5.11.4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.12:rc1:*:*:*:*:*:* Versions 5.12 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.12:rc2:*:*:*:*:*:* Versions 5.12 rc2 Vulnerable ·Linux
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2021-28038
- 2026-10-03 Alias added: GHSA-j7vw-r676-53wr
References
Patch 2
Advisory 3
Sources
- CVE-2021-28038 · CVE Program
- CVE-2021-28038 · NVD
- FIRST EPSS
- GHSA-j7vw-r676-53wr · GitHub Advisory Database · CC BY 4.0
- CVE-2021-28038 · Red Hat security data · CC BY 4.0
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