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Oracle Linux: CVE-2020-26541: ELSA-2020-5913: Unbreakable Enterprise kernel security update (IMPORTANT) (Multiple Advisories)

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Oracle Linux: CVE-2020-26541: ELSA-2020-5913: Unbreakable Enterprise kernel security update (IMPORTANT) (Multiple Advisories)

Severity
6
CVSS
(AV:L/AC:L/Au:M/C:C/I:C/A:C)
Published
09/15/2020
Created
07/02/2021
Added
07/01/2021
Modified
11/11/2024

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. A flaw was found in the Linux kernel in certs/blacklist.c, When signature entries for EFI_CERT_X509_GUID are contained in the Secure Boot Forbidden Signature Database, the entries are skipped. This can cause a security threat and breach system integrity, confidentiality and even lead to a denial of service problem.

Solution(s)

  • oracle-linux-upgrade-kernel

References

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