QID 354049

Date Published: 2022-08-24

QID 354049: Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.4-2022-034

An out-of-bounds write flaw was found in the linux kernel’s framebuffer-based console driver functionality in the way a user triggers ioctl fbioput_vscreeninfo with malicious data.
This flaw allows a local user to crash or potentially escalate their privileges on the system. (
( CVE-2021-33655) a bug in the ima subsystem was discovered which would incorrectly allow kexec to be used when kernel lockdown was enabled (cve-2022-21505) a heap buffer overflow flaw was found in the linux kernel's netfilter subsystem in the way a user provides incorrect input of the nft_data_verdict type.
( CVE-2022-34918) an issue was discovered in the linux kernel through 5.18.14.
Xfrm_expand_policies in net/xfrm/xfrm_policy.c can cause a refcount to be dropped twice. (
( CVE-2022-36879) a memory corruption flaw was found in the linux kernel's netfilter subsystem in the way a local user uses the libnetfilter_queue when analyzing a corrupted network packet.
This flaw allows a local user to crash the system or a remote user to crash the system when the libnetfilter_queue is used by a local user. (
( CVE-2022-36946)



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as High - 7.8 severity.
  • CVSS V2 rated as High - 7.2 severity.
    • Solution
    Please refer to Amazon advisory: ALAS2KERNEL-5.4-2022-034 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 354049

    CVE-2022-21505 | CVE-2022-34918 | CVE-2022-36879 | CVE-2022-36946 | CVE-2021-33655 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS2KERNEL-5.4-2022-034 Amazon Linux 2 URL Logo alas.aws.amazon.com/AL2/ALASKERNEL-5.4-2022-034.html
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