Vulnerability · Published Aug 8, 2021 · Assigned by mitre
CVE-2021-38198
Medium 5.5
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 39% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.4%top 60.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
arch/x86/kvm/mmu/paging_tmpl.h in the Linux kernel before 5.12.11 incorrectly computes the access permissions of a shadow page, leading to a missing guest protection page fault.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.10.46-1 | DEBIAN-CVE-2021-38198 |
| Debian:13 | linux | 5.10.46-1 | DEBIAN-CVE-2021-38198 |
| Debian:14 | linux | 5.10.46-1 | DEBIAN-CVE-2021-38198 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2021-38198 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2021-38198 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2021-38198 |
Affected products (as reported)
References
- https://github.com/torvalds/linux/commit/b1bd5cba3306691c771d558e94baa73e8b0b96b7 x_refsource_MISC
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.11 x_refsource_MISC
- [debian-lts-announce] 20211015 [SECURITY] [DLA 2785-1] linux-4.19 security update mailing-list, x_refsource_MLIST
- [debian-lts-announce] 20211216 [SECURITY] [DLA 2843-1] linux security update mailing-list, x_refsource_MLIST