CVE-2021-28038

MEDIUM

6.5

CVSS Score

Published: March 5, 2021 at 12:00 AM UTC

Updated: June 17, 2026 at 03:45 AM UTC

4 products affected across 3 vendorsLinux KernelDebian LinuxCloud Backup

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Severity

MEDIUM6.5

Exploit prediction

EPSS 0.7%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

9.0

Linux Kernel · Linux

95%

2.6.39 ≤ v < 4.4.2604.10.0 ≤ v < 4.14.2244.15.0 ≤ v < 4.19.1794.20.0 ≤ v < 5.4.1034.5.0 ≤ v < 4.9.2605.10.0 ≤ v < 5.10.215.11.0 ≤ v < 5.11.45.12 rc1 5.12 rc2

Affected range stops below 4.14.224, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.19.179, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.4.260, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.9.260, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.10.21, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.11.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.4.103, so it looks safe — our inference, not a vendor statement

Cloud Backup · NetAppdrupal

95%

All versions

Solidfire Baseboard Management Controller Firmware · NetApp

95%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (6)

Mailing ListPatchThird Party Advisory

Source: [email protected]

http://www.openwall.com/lists/oss-security/2021/03/05/1

PatchVendor Advisory

Source: [email protected]

http://xenbits.xen.org/xsa/advisory-367.html

Source: [email protected]

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2991397d23ec597405b116d96de3813420bdcbc3

Mailing ListThird Party Advisory

Source: [email protected]

https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html

Mailing ListThird Party Advisory

Source: [email protected]

https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html

Third Party Advisory

Source: [email protected]

https://security.netapp.com/advisory/ntap-20210409-0001/

CVSS

6.5MEDIUM[email protected]

Attack Vector: LOCAL
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: CHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-770

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