Vulnerability · Published Mar 5, 2021 · Assigned by mitre
CVE-2021-28039
Medium 6.5
In plain English
A medium-severity security flaw in the linux package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)0.4%top 63.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
An issue was discovered in the Linux kernel 5.9.x through 5.11.3, as used with Xen. In some less-common configurations, an x86 PV guest OS user can crash a Dom0 or driver domain via a large amount of I/O activity. The issue relates to misuse of guest physical addresses when a configuration has CONFIG_XEN_UNPOPULATED_ALLOC but not CONFIG_XEN_BALLOON_MEMORY_HOTPLUG.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.10.24-1 | DEBIAN-CVE-2021-28039 |
| Debian:13 | linux | 5.10.24-1 | DEBIAN-CVE-2021-28039 |
| Debian:14 | linux | 5.10.24-1 | DEBIAN-CVE-2021-28039 |
Affected products (as reported)
References
- http://xenbits.xen.org/xsa/advisory-369.html
- [oss-security] 20210305 Xen Security Advisory 369 v2 (CVE-2021-28039) - Linux: special config may crash when trying to map foreign pages mailing-list
- https://security.netapp.com/advisory/ntap-20210409-0001/
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=882213990d32fd224340a4533f6318dd152be4b2