Home/CVE/An issue was discovered in the Linux kernel through 5.11.3, as used with Xen PV. A certain part of the netback driver la
CVE

CVE-2021-28038

An issue was discovered in the Linux kernel through 5.11.3, as used with Xen PV. A certain part of the netback driver la

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.

MEDIUM · CVSS 6.5 EPSS 0.00057
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-770Allocation of Resources Without Limits or Throttling
▤

Affected Products & Versions

11
linux kernel>= 2.6.39 and < 4.4.260
linux kernel>= 4.5.0 and < 4.9.260
linux kernel>= 4.10.0 and < 4.14.224
linux kernel>= 4.15.0 and < 4.19.179
linux kernel>= 4.20.0 and < 5.4.103
linux kernel>= 5.10.0 and < 5.10.21
linux kernel>= 5.11.0 and < 5.11.4
linux kernelall versions
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD05 Mar 2021 · 06:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
⚑

Vendor Advisories

24
suse-csafopenSUSE-SU-2021:1975-1
suse-csafopenSUSE-SU-2021:1977-1
suse-csafSUSE-SU-2021:1975-1
suse-csafSUSE-SU-2021:1977-1
usnUSN-4984-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.openwall.com/lists/oss-security/2021/03/05/1Mailing ListPatchThird Party Advisory
http://xenbits.xen.org/xsa/advisory-367.htmlPatchVendor Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2991397d23ec597405b116d96de3813420bdcbc3
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/03/msg00035.htmlThird Party Advisory
https://security.netapp.com/advisory/ntap-20210409-0001/Third Party Advisory
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