Vulnerability · Published Oct 2, 2020 · Assigned by mitre
CVE-2020-26541
Medium 6.5
In plain English
A medium-severity security flaw in the kernel-tools-libs-devel package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.5%top 55.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
The Linux kernel through 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database (aka dbx) protection mechanism. This affects certs/blacklist.c and certs/system_keyring.c.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | kernel-tools-libs-devel | 4.18.0-305.7.1.el8_4 | ALSA-2021:2570 |
| Debian:12 | linux | 5.14.6-1 | DEBIAN-CVE-2020-26541 |
| Debian:13 | linux | 5.14.6-1 | DEBIAN-CVE-2020-26541 |
| Debian:14 | linux | 5.14.6-1 | DEBIAN-CVE-2020-26541 |
| Rocky Linux:8 | kernel | 0:4.18.0-305.7.1.el8_4 | RLSA-2021:2570 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2020-26541 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2020-26541 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2020-26541 |
Affected products (as reported)
References
- https://lkml.org/lkml/2020/9/15/1871 x_refsource_MISC